kern_racct.c revision 290857
1220137Strasz/*- 2220137Strasz * Copyright (c) 2010 The FreeBSD Foundation 3220137Strasz * All rights reserved. 4220137Strasz * 5220137Strasz * This software was developed by Edward Tomasz Napierala under sponsorship 6220137Strasz * from the FreeBSD Foundation. 7220137Strasz * 8220137Strasz * Redistribution and use in source and binary forms, with or without 9220137Strasz * modification, are permitted provided that the following conditions 10220137Strasz * are met: 11220137Strasz * 1. Redistributions of source code must retain the above copyright 12220137Strasz * notice, this list of conditions and the following disclaimer. 13220137Strasz * 2. Redistributions in binary form must reproduce the above copyright 14220137Strasz * notice, this list of conditions and the following disclaimer in the 15220137Strasz * documentation and/or other materials provided with the distribution. 16220137Strasz * 17220137Strasz * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18220137Strasz * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19220137Strasz * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20220137Strasz * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21220137Strasz * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22220137Strasz * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23220137Strasz * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24220137Strasz * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25220137Strasz * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26220137Strasz * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27220137Strasz * SUCH DAMAGE. 28220137Strasz * 29220137Strasz * $FreeBSD: head/sys/kern/kern_racct.c 290857 2015-11-15 12:10:51Z trasz $ 30220137Strasz */ 31220137Strasz 32220137Strasz#include <sys/cdefs.h> 33220137Strasz__FBSDID("$FreeBSD: head/sys/kern/kern_racct.c 290857 2015-11-15 12:10:51Z trasz $"); 34220137Strasz 35242139Strasz#include "opt_sched.h" 36220137Strasz 37220137Strasz#include <sys/param.h> 38228430Savg#include <sys/systm.h> 39220137Strasz#include <sys/eventhandler.h> 40220137Strasz#include <sys/jail.h> 41220137Strasz#include <sys/kernel.h> 42220137Strasz#include <sys/kthread.h> 43220137Strasz#include <sys/lock.h> 44220137Strasz#include <sys/loginclass.h> 45220137Strasz#include <sys/malloc.h> 46220137Strasz#include <sys/mutex.h> 47220137Strasz#include <sys/proc.h> 48220137Strasz#include <sys/racct.h> 49220137Strasz#include <sys/resourcevar.h> 50220137Strasz#include <sys/sbuf.h> 51220137Strasz#include <sys/sched.h> 52220137Strasz#include <sys/sdt.h> 53242139Strasz#include <sys/smp.h> 54220137Strasz#include <sys/sx.h> 55242139Strasz#include <sys/sysctl.h> 56220137Strasz#include <sys/sysent.h> 57220137Strasz#include <sys/sysproto.h> 58220137Strasz#include <sys/umtx.h> 59242139Strasz#include <machine/smp.h> 60220137Strasz 61220137Strasz#ifdef RCTL 62220137Strasz#include <sys/rctl.h> 63220137Strasz#endif 64220137Strasz 65220137Strasz#ifdef RACCT 66220137Strasz 67220137StraszFEATURE(racct, "Resource Accounting"); 68220137Strasz 69242139Strasz/* 70242139Strasz * Do not block processes that have their %cpu usage <= pcpu_threshold. 71242139Strasz */ 72242139Straszstatic int pcpu_threshold = 1; 73282901Strasz#ifdef RACCT_DEFAULT_TO_DISABLED 74282213Straszint racct_enable = 0; 75282213Strasz#else 76282213Straszint racct_enable = 1; 77282213Strasz#endif 78242139Strasz 79242139StraszSYSCTL_NODE(_kern, OID_AUTO, racct, CTLFLAG_RW, 0, "Resource Accounting"); 80282213StraszSYSCTL_UINT(_kern_racct, OID_AUTO, enable, CTLFLAG_RDTUN, &racct_enable, 81282213Strasz 0, "Enable RACCT/RCTL"); 82242139StraszSYSCTL_UINT(_kern_racct, OID_AUTO, pcpu_threshold, CTLFLAG_RW, &pcpu_threshold, 83242139Strasz 0, "Processes with higher %cpu usage than this value can be throttled."); 84242139Strasz 85242139Strasz/* 86242139Strasz * How many seconds it takes to use the scheduler %cpu calculations. When a 87242139Strasz * process starts, we compute its %cpu usage by dividing its runtime by the 88242139Strasz * process wall clock time. After RACCT_PCPU_SECS pass, we use the value 89242139Strasz * provided by the scheduler. 90242139Strasz */ 91242139Strasz#define RACCT_PCPU_SECS 3 92242139Strasz 93220137Straszstatic struct mtx racct_lock; 94220137StraszMTX_SYSINIT(racct_lock, &racct_lock, "racct lock", MTX_DEF); 95220137Strasz 96220137Straszstatic uma_zone_t racct_zone; 97220137Strasz 98220137Straszstatic void racct_sub_racct(struct racct *dest, const struct racct *src); 99220137Straszstatic void racct_sub_cred_locked(struct ucred *cred, int resource, 100220137Strasz uint64_t amount); 101220137Straszstatic void racct_add_cred_locked(struct ucred *cred, int resource, 102220137Strasz uint64_t amount); 103220137Strasz 104220137StraszSDT_PROVIDER_DEFINE(racct); 105258622SavgSDT_PROBE_DEFINE3(racct, kernel, rusage, add, "struct proc *", "int", 106220137Strasz "uint64_t"); 107258622SavgSDT_PROBE_DEFINE3(racct, kernel, rusage, add__failure, 108220137Strasz "struct proc *", "int", "uint64_t"); 109258622SavgSDT_PROBE_DEFINE3(racct, kernel, rusage, add__cred, "struct ucred *", 110220137Strasz "int", "uint64_t"); 111258622SavgSDT_PROBE_DEFINE3(racct, kernel, rusage, add__force, "struct proc *", 112220137Strasz "int", "uint64_t"); 113258622SavgSDT_PROBE_DEFINE3(racct, kernel, rusage, set, "struct proc *", "int", 114220137Strasz "uint64_t"); 115258622SavgSDT_PROBE_DEFINE3(racct, kernel, rusage, set__failure, 116220137Strasz "struct proc *", "int", "uint64_t"); 117258622SavgSDT_PROBE_DEFINE3(racct, kernel, rusage, sub, "struct proc *", "int", 118220137Strasz "uint64_t"); 119258622SavgSDT_PROBE_DEFINE3(racct, kernel, rusage, sub__cred, "struct ucred *", 120220137Strasz "int", "uint64_t"); 121258622SavgSDT_PROBE_DEFINE1(racct, kernel, racct, create, "struct racct *"); 122258622SavgSDT_PROBE_DEFINE1(racct, kernel, racct, destroy, "struct racct *"); 123258622SavgSDT_PROBE_DEFINE2(racct, kernel, racct, join, "struct racct *", 124220137Strasz "struct racct *"); 125258622SavgSDT_PROBE_DEFINE2(racct, kernel, racct, join__failure, 126220137Strasz "struct racct *", "struct racct *"); 127258622SavgSDT_PROBE_DEFINE2(racct, kernel, racct, leave, "struct racct *", 128220137Strasz "struct racct *"); 129220137Strasz 130220137Straszint racct_types[] = { 131220137Strasz [RACCT_CPU] = 132224036Strasz RACCT_IN_MILLIONS, 133220137Strasz [RACCT_DATA] = 134220137Strasz RACCT_RECLAIMABLE | RACCT_INHERITABLE | RACCT_DENIABLE, 135220137Strasz [RACCT_STACK] = 136220137Strasz RACCT_RECLAIMABLE | RACCT_INHERITABLE | RACCT_DENIABLE, 137220137Strasz [RACCT_CORE] = 138220137Strasz RACCT_DENIABLE, 139220137Strasz [RACCT_RSS] = 140220137Strasz RACCT_RECLAIMABLE, 141220137Strasz [RACCT_MEMLOCK] = 142220137Strasz RACCT_RECLAIMABLE | RACCT_DENIABLE, 143220137Strasz [RACCT_NPROC] = 144220137Strasz RACCT_RECLAIMABLE | RACCT_DENIABLE, 145220137Strasz [RACCT_NOFILE] = 146220137Strasz RACCT_RECLAIMABLE | RACCT_INHERITABLE | RACCT_DENIABLE, 147220137Strasz [RACCT_VMEM] = 148220137Strasz RACCT_RECLAIMABLE | RACCT_INHERITABLE | RACCT_DENIABLE, 149220137Strasz [RACCT_NPTS] = 150220137Strasz RACCT_RECLAIMABLE | RACCT_DENIABLE | RACCT_SLOPPY, 151220137Strasz [RACCT_SWAP] = 152220137Strasz RACCT_RECLAIMABLE | RACCT_DENIABLE | RACCT_SLOPPY, 153220137Strasz [RACCT_NTHR] = 154220137Strasz RACCT_RECLAIMABLE | RACCT_DENIABLE, 155220137Strasz [RACCT_MSGQQUEUED] = 156220137Strasz RACCT_RECLAIMABLE | RACCT_DENIABLE | RACCT_SLOPPY, 157220137Strasz [RACCT_MSGQSIZE] = 158220137Strasz RACCT_RECLAIMABLE | RACCT_DENIABLE | RACCT_SLOPPY, 159220137Strasz [RACCT_NMSGQ] = 160220137Strasz RACCT_RECLAIMABLE | RACCT_DENIABLE | RACCT_SLOPPY, 161220137Strasz [RACCT_NSEM] = 162220137Strasz RACCT_RECLAIMABLE | RACCT_DENIABLE | RACCT_SLOPPY, 163220137Strasz [RACCT_NSEMOP] = 164220137Strasz RACCT_RECLAIMABLE | RACCT_INHERITABLE | RACCT_DENIABLE, 165220137Strasz [RACCT_NSHM] = 166220137Strasz RACCT_RECLAIMABLE | RACCT_DENIABLE | RACCT_SLOPPY, 167220137Strasz [RACCT_SHMSIZE] = 168220137Strasz RACCT_RECLAIMABLE | RACCT_DENIABLE | RACCT_SLOPPY, 169220137Strasz [RACCT_WALLCLOCK] = 170242139Strasz RACCT_IN_MILLIONS, 171242139Strasz [RACCT_PCTCPU] = 172242139Strasz RACCT_DECAYING | RACCT_DENIABLE | RACCT_IN_MILLIONS }; 173220137Strasz 174242139Straszstatic const fixpt_t RACCT_DECAY_FACTOR = 0.3 * FSCALE; 175242139Strasz 176242139Strasz#ifdef SCHED_4BSD 177242139Strasz/* 178242139Strasz * Contains intermediate values for %cpu calculations to avoid using floating 179242139Strasz * point in the kernel. 180242139Strasz * ccpu_exp[k] = FSCALE * (ccpu/FSCALE)^k = FSCALE * exp(-k/20) 181242139Strasz * It is needed only for the 4BSD scheduler, because in ULE, the ccpu equals to 182242139Strasz * zero so the calculations are more straightforward. 183242139Strasz */ 184242139Straszfixpt_t ccpu_exp[] = { 185242139Strasz [0] = FSCALE * 1, 186242139Strasz [1] = FSCALE * 0.95122942450071400909, 187242139Strasz [2] = FSCALE * 0.90483741803595957316, 188242139Strasz [3] = FSCALE * 0.86070797642505780722, 189242139Strasz [4] = FSCALE * 0.81873075307798185866, 190242139Strasz [5] = FSCALE * 0.77880078307140486824, 191242139Strasz [6] = FSCALE * 0.74081822068171786606, 192242139Strasz [7] = FSCALE * 0.70468808971871343435, 193242139Strasz [8] = FSCALE * 0.67032004603563930074, 194242139Strasz [9] = FSCALE * 0.63762815162177329314, 195242139Strasz [10] = FSCALE * 0.60653065971263342360, 196242139Strasz [11] = FSCALE * 0.57694981038048669531, 197242139Strasz [12] = FSCALE * 0.54881163609402643262, 198242139Strasz [13] = FSCALE * 0.52204577676101604789, 199242139Strasz [14] = FSCALE * 0.49658530379140951470, 200242139Strasz [15] = FSCALE * 0.47236655274101470713, 201242139Strasz [16] = FSCALE * 0.44932896411722159143, 202242139Strasz [17] = FSCALE * 0.42741493194872666992, 203242139Strasz [18] = FSCALE * 0.40656965974059911188, 204242139Strasz [19] = FSCALE * 0.38674102345450120691, 205242139Strasz [20] = FSCALE * 0.36787944117144232159, 206242139Strasz [21] = FSCALE * 0.34993774911115535467, 207242139Strasz [22] = FSCALE * 0.33287108369807955328, 208242139Strasz [23] = FSCALE * 0.31663676937905321821, 209242139Strasz [24] = FSCALE * 0.30119421191220209664, 210242139Strasz [25] = FSCALE * 0.28650479686019010032, 211242139Strasz [26] = FSCALE * 0.27253179303401260312, 212242139Strasz [27] = FSCALE * 0.25924026064589150757, 213242139Strasz [28] = FSCALE * 0.24659696394160647693, 214242139Strasz [29] = FSCALE * 0.23457028809379765313, 215242139Strasz [30] = FSCALE * 0.22313016014842982893, 216242139Strasz [31] = FSCALE * 0.21224797382674305771, 217242139Strasz [32] = FSCALE * 0.20189651799465540848, 218242139Strasz [33] = FSCALE * 0.19204990862075411423, 219242139Strasz [34] = FSCALE * 0.18268352405273465022, 220242139Strasz [35] = FSCALE * 0.17377394345044512668, 221242139Strasz [36] = FSCALE * 0.16529888822158653829, 222242139Strasz [37] = FSCALE * 0.15723716631362761621, 223242139Strasz [38] = FSCALE * 0.14956861922263505264, 224242139Strasz [39] = FSCALE * 0.14227407158651357185, 225242139Strasz [40] = FSCALE * 0.13533528323661269189, 226242139Strasz [41] = FSCALE * 0.12873490358780421886, 227242139Strasz [42] = FSCALE * 0.12245642825298191021, 228242139Strasz [43] = FSCALE * 0.11648415777349695786, 229242139Strasz [44] = FSCALE * 0.11080315836233388333, 230242139Strasz [45] = FSCALE * 0.10539922456186433678, 231242139Strasz [46] = FSCALE * 0.10025884372280373372, 232242139Strasz [47] = FSCALE * 0.09536916221554961888, 233242139Strasz [48] = FSCALE * 0.09071795328941250337, 234242139Strasz [49] = FSCALE * 0.08629358649937051097, 235242139Strasz [50] = FSCALE * 0.08208499862389879516, 236242139Strasz [51] = FSCALE * 0.07808166600115315231, 237242139Strasz [52] = FSCALE * 0.07427357821433388042, 238242139Strasz [53] = FSCALE * 0.07065121306042958674, 239242139Strasz [54] = FSCALE * 0.06720551273974976512, 240242139Strasz [55] = FSCALE * 0.06392786120670757270, 241242139Strasz [56] = FSCALE * 0.06081006262521796499, 242242139Strasz [57] = FSCALE * 0.05784432087483846296, 243242139Strasz [58] = FSCALE * 0.05502322005640722902, 244242139Strasz [59] = FSCALE * 0.05233970594843239308, 245242139Strasz [60] = FSCALE * 0.04978706836786394297, 246242139Strasz [61] = FSCALE * 0.04735892439114092119, 247242139Strasz [62] = FSCALE * 0.04504920239355780606, 248242139Strasz [63] = FSCALE * 0.04285212686704017991, 249242139Strasz [64] = FSCALE * 0.04076220397836621516, 250242139Strasz [65] = FSCALE * 0.03877420783172200988, 251242139Strasz [66] = FSCALE * 0.03688316740124000544, 252242139Strasz [67] = FSCALE * 0.03508435410084502588, 253242139Strasz [68] = FSCALE * 0.03337326996032607948, 254242139Strasz [69] = FSCALE * 0.03174563637806794323, 255242139Strasz [70] = FSCALE * 0.03019738342231850073, 256242139Strasz [71] = FSCALE * 0.02872463965423942912, 257242139Strasz [72] = FSCALE * 0.02732372244729256080, 258242139Strasz [73] = FSCALE * 0.02599112877875534358, 259242139Strasz [74] = FSCALE * 0.02472352647033939120, 260242139Strasz [75] = FSCALE * 0.02351774585600910823, 261242139Strasz [76] = FSCALE * 0.02237077185616559577, 262242139Strasz [77] = FSCALE * 0.02127973643837716938, 263242139Strasz [78] = FSCALE * 0.02024191144580438847, 264242139Strasz [79] = FSCALE * 0.01925470177538692429, 265242139Strasz [80] = FSCALE * 0.01831563888873418029, 266242139Strasz [81] = FSCALE * 0.01742237463949351138, 267242139Strasz [82] = FSCALE * 0.01657267540176124754, 268242139Strasz [83] = FSCALE * 0.01576441648485449082, 269242139Strasz [84] = FSCALE * 0.01499557682047770621, 270242139Strasz [85] = FSCALE * 0.01426423390899925527, 271242139Strasz [86] = FSCALE * 0.01356855901220093175, 272242139Strasz [87] = FSCALE * 0.01290681258047986886, 273242139Strasz [88] = FSCALE * 0.01227733990306844117, 274242139Strasz [89] = FSCALE * 0.01167856697039544521, 275242139Strasz [90] = FSCALE * 0.01110899653824230649, 276242139Strasz [91] = FSCALE * 0.01056720438385265337, 277242139Strasz [92] = FSCALE * 0.01005183574463358164, 278242139Strasz [93] = FSCALE * 0.00956160193054350793, 279242139Strasz [94] = FSCALE * 0.00909527710169581709, 280242139Strasz [95] = FSCALE * 0.00865169520312063417, 281242139Strasz [96] = FSCALE * 0.00822974704902002884, 282242139Strasz [97] = FSCALE * 0.00782837754922577143, 283242139Strasz [98] = FSCALE * 0.00744658307092434051, 284242139Strasz [99] = FSCALE * 0.00708340892905212004, 285242139Strasz [100] = FSCALE * 0.00673794699908546709, 286242139Strasz [101] = FSCALE * 0.00640933344625638184, 287242139Strasz [102] = FSCALE * 0.00609674656551563610, 288242139Strasz [103] = FSCALE * 0.00579940472684214321, 289242139Strasz [104] = FSCALE * 0.00551656442076077241, 290242139Strasz [105] = FSCALE * 0.00524751839918138427, 291242139Strasz [106] = FSCALE * 0.00499159390691021621, 292242139Strasz [107] = FSCALE * 0.00474815099941147558, 293242139Strasz [108] = FSCALE * 0.00451658094261266798, 294242139Strasz [109] = FSCALE * 0.00429630469075234057, 295242139Strasz [110] = FSCALE * 0.00408677143846406699, 296242139Strasz}; 297242139Strasz#endif 298242139Strasz 299242139Strasz#define CCPU_EXP_MAX 110 300242139Strasz 301242139Strasz/* 302242139Strasz * This function is analogical to the getpcpu() function in the ps(1) command. 303242139Strasz * They should both calculate in the same way so that the racct %cpu 304242139Strasz * calculations are consistent with the values showed by the ps(1) tool. 305242139Strasz * The calculations are more complex in the 4BSD scheduler because of the value 306242139Strasz * of the ccpu variable. In ULE it is defined to be zero which saves us some 307242139Strasz * work. 308242139Strasz */ 309242139Straszstatic uint64_t 310242139Straszracct_getpcpu(struct proc *p, u_int pcpu) 311242139Strasz{ 312242139Strasz u_int swtime; 313242139Strasz#ifdef SCHED_4BSD 314242139Strasz fixpt_t pctcpu, pctcpu_next; 315242139Strasz#endif 316242139Strasz#ifdef SMP 317242139Strasz struct pcpu *pc; 318242139Strasz int found; 319242139Strasz#endif 320242139Strasz fixpt_t p_pctcpu; 321242139Strasz struct thread *td; 322242139Strasz 323282213Strasz ASSERT_RACCT_ENABLED(); 324282213Strasz 325242139Strasz /* 326242139Strasz * If the process is swapped out, we count its %cpu usage as zero. 327242139Strasz * This behaviour is consistent with the userland ps(1) tool. 328242139Strasz */ 329242139Strasz if ((p->p_flag & P_INMEM) == 0) 330242139Strasz return (0); 331242139Strasz swtime = (ticks - p->p_swtick) / hz; 332242139Strasz 333242139Strasz /* 334242139Strasz * For short-lived processes, the sched_pctcpu() returns small 335242139Strasz * values even for cpu intensive processes. Therefore we use 336242139Strasz * our own estimate in this case. 337242139Strasz */ 338242139Strasz if (swtime < RACCT_PCPU_SECS) 339242139Strasz return (pcpu); 340242139Strasz 341242139Strasz p_pctcpu = 0; 342242139Strasz FOREACH_THREAD_IN_PROC(p, td) { 343242139Strasz if (td == PCPU_GET(idlethread)) 344242139Strasz continue; 345242139Strasz#ifdef SMP 346242139Strasz found = 0; 347242139Strasz STAILQ_FOREACH(pc, &cpuhead, pc_allcpu) { 348242139Strasz if (td == pc->pc_idlethread) { 349242139Strasz found = 1; 350242139Strasz break; 351242139Strasz } 352242139Strasz } 353242139Strasz if (found) 354242139Strasz continue; 355242139Strasz#endif 356242139Strasz thread_lock(td); 357242139Strasz#ifdef SCHED_4BSD 358242139Strasz pctcpu = sched_pctcpu(td); 359242139Strasz /* Count also the yet unfinished second. */ 360242139Strasz pctcpu_next = (pctcpu * ccpu_exp[1]) >> FSHIFT; 361242139Strasz pctcpu_next += sched_pctcpu_delta(td); 362242139Strasz p_pctcpu += max(pctcpu, pctcpu_next); 363242139Strasz#else 364242139Strasz /* 365242139Strasz * In ULE the %cpu statistics are updated on every 366242139Strasz * sched_pctcpu() call. So special calculations to 367242139Strasz * account for the latest (unfinished) second are 368242139Strasz * not needed. 369242139Strasz */ 370242139Strasz p_pctcpu += sched_pctcpu(td); 371242139Strasz#endif 372242139Strasz thread_unlock(td); 373242139Strasz } 374242139Strasz 375242139Strasz#ifdef SCHED_4BSD 376242139Strasz if (swtime <= CCPU_EXP_MAX) 377242139Strasz return ((100 * (uint64_t)p_pctcpu * 1000000) / 378242139Strasz (FSCALE - ccpu_exp[swtime])); 379242139Strasz#endif 380242139Strasz 381242139Strasz return ((100 * (uint64_t)p_pctcpu * 1000000) / FSCALE); 382242139Strasz} 383242139Strasz 384220137Straszstatic void 385220137Straszracct_add_racct(struct racct *dest, const struct racct *src) 386220137Strasz{ 387220137Strasz int i; 388220137Strasz 389282213Strasz ASSERT_RACCT_ENABLED(); 390220137Strasz mtx_assert(&racct_lock, MA_OWNED); 391220137Strasz 392220137Strasz /* 393220137Strasz * Update resource usage in dest. 394220137Strasz */ 395220137Strasz for (i = 0; i <= RACCT_MAX; i++) { 396220137Strasz KASSERT(dest->r_resources[i] >= 0, 397243088Strasz ("%s: resource %d propagation meltdown: dest < 0", 398243088Strasz __func__, i)); 399220137Strasz KASSERT(src->r_resources[i] >= 0, 400243088Strasz ("%s: resource %d propagation meltdown: src < 0", 401243088Strasz __func__, i)); 402220137Strasz dest->r_resources[i] += src->r_resources[i]; 403220137Strasz } 404220137Strasz} 405220137Strasz 406220137Straszstatic void 407220137Straszracct_sub_racct(struct racct *dest, const struct racct *src) 408220137Strasz{ 409220137Strasz int i; 410220137Strasz 411282213Strasz ASSERT_RACCT_ENABLED(); 412220137Strasz mtx_assert(&racct_lock, MA_OWNED); 413220137Strasz 414220137Strasz /* 415220137Strasz * Update resource usage in dest. 416220137Strasz */ 417220137Strasz for (i = 0; i <= RACCT_MAX; i++) { 418243070Strasz if (!RACCT_IS_SLOPPY(i) && !RACCT_IS_DECAYING(i)) { 419220137Strasz KASSERT(dest->r_resources[i] >= 0, 420243088Strasz ("%s: resource %d propagation meltdown: dest < 0", 421243088Strasz __func__, i)); 422220137Strasz KASSERT(src->r_resources[i] >= 0, 423243088Strasz ("%s: resource %d propagation meltdown: src < 0", 424243088Strasz __func__, i)); 425220137Strasz KASSERT(src->r_resources[i] <= dest->r_resources[i], 426243088Strasz ("%s: resource %d propagation meltdown: src > dest", 427243088Strasz __func__, i)); 428220137Strasz } 429242139Strasz if (RACCT_CAN_DROP(i)) { 430220137Strasz dest->r_resources[i] -= src->r_resources[i]; 431220137Strasz if (dest->r_resources[i] < 0) { 432243070Strasz KASSERT(RACCT_IS_SLOPPY(i) || 433243070Strasz RACCT_IS_DECAYING(i), 434243088Strasz ("%s: resource %d usage < 0", __func__, i)); 435220137Strasz dest->r_resources[i] = 0; 436220137Strasz } 437220137Strasz } 438220137Strasz } 439220137Strasz} 440220137Strasz 441220137Straszvoid 442220137Straszracct_create(struct racct **racctp) 443220137Strasz{ 444220137Strasz 445282213Strasz if (!racct_enable) 446282213Strasz return; 447282213Strasz 448288336Savg SDT_PROBE1(racct, kernel, racct, create, racctp); 449220137Strasz 450220137Strasz KASSERT(*racctp == NULL, ("racct already allocated")); 451220137Strasz 452220137Strasz *racctp = uma_zalloc(racct_zone, M_WAITOK | M_ZERO); 453220137Strasz} 454220137Strasz 455220137Straszstatic void 456220137Straszracct_destroy_locked(struct racct **racctp) 457220137Strasz{ 458220137Strasz int i; 459220137Strasz struct racct *racct; 460220137Strasz 461282213Strasz ASSERT_RACCT_ENABLED(); 462282213Strasz 463288336Savg SDT_PROBE1(racct, kernel, racct, destroy, racctp); 464220137Strasz 465220137Strasz mtx_assert(&racct_lock, MA_OWNED); 466220137Strasz KASSERT(racctp != NULL, ("NULL racctp")); 467220137Strasz KASSERT(*racctp != NULL, ("NULL racct")); 468220137Strasz 469220137Strasz racct = *racctp; 470220137Strasz 471220137Strasz for (i = 0; i <= RACCT_MAX; i++) { 472223844Strasz if (RACCT_IS_SLOPPY(i)) 473220137Strasz continue; 474223844Strasz if (!RACCT_IS_RECLAIMABLE(i)) 475220137Strasz continue; 476220137Strasz KASSERT(racct->r_resources[i] == 0, 477220137Strasz ("destroying non-empty racct: " 478220137Strasz "%ju allocated for resource %d\n", 479220137Strasz racct->r_resources[i], i)); 480220137Strasz } 481220137Strasz uma_zfree(racct_zone, racct); 482220137Strasz *racctp = NULL; 483220137Strasz} 484220137Strasz 485220137Straszvoid 486220137Straszracct_destroy(struct racct **racct) 487220137Strasz{ 488220137Strasz 489282213Strasz if (!racct_enable) 490282213Strasz return; 491282213Strasz 492220137Strasz mtx_lock(&racct_lock); 493220137Strasz racct_destroy_locked(racct); 494220137Strasz mtx_unlock(&racct_lock); 495220137Strasz} 496220137Strasz 497220137Strasz/* 498220137Strasz * Increase consumption of 'resource' by 'amount' for 'racct' 499220137Strasz * and all its parents. Differently from other cases, 'amount' here 500220137Strasz * may be less than zero. 501220137Strasz */ 502220137Straszstatic void 503284378Sjlhracct_adjust_resource(struct racct *racct, int resource, 504220137Strasz uint64_t amount) 505220137Strasz{ 506220137Strasz 507282213Strasz ASSERT_RACCT_ENABLED(); 508220137Strasz mtx_assert(&racct_lock, MA_OWNED); 509220137Strasz KASSERT(racct != NULL, ("NULL racct")); 510220137Strasz 511220137Strasz racct->r_resources[resource] += amount; 512220137Strasz if (racct->r_resources[resource] < 0) { 513242139Strasz KASSERT(RACCT_IS_SLOPPY(resource) || RACCT_IS_DECAYING(resource), 514243088Strasz ("%s: resource %d usage < 0", __func__, resource)); 515220137Strasz racct->r_resources[resource] = 0; 516220137Strasz } 517242139Strasz 518242139Strasz /* 519242139Strasz * There are some cases where the racct %cpu resource would grow 520290662Sjpaetzel * beyond 100% per core. For example in racct_proc_exit() we add 521290662Sjpaetzel * the process %cpu usage to the ucred racct containers. If too 522290662Sjpaetzel * many processes terminated in a short time span, the ucred %cpu 523290662Sjpaetzel * resource could grow too much. Also, the 4BSD scheduler sometimes 524290662Sjpaetzel * returns for a thread more than 100% cpu usage. So we set a sane 525290662Sjpaetzel * boundary here to 100% * the maxumum number of CPUs. 526242139Strasz */ 527242139Strasz if ((resource == RACCT_PCTCPU) && 528290662Sjpaetzel (racct->r_resources[RACCT_PCTCPU] > 100 * 1000000 * (int64_t)MAXCPU)) 529290662Sjpaetzel racct->r_resources[RACCT_PCTCPU] = 100 * 1000000 * (int64_t)MAXCPU; 530220137Strasz} 531220137Strasz 532225944Straszstatic int 533225944Straszracct_add_locked(struct proc *p, int resource, uint64_t amount) 534220137Strasz{ 535220137Strasz#ifdef RCTL 536220137Strasz int error; 537220137Strasz#endif 538220137Strasz 539282213Strasz ASSERT_RACCT_ENABLED(); 540282213Strasz 541288336Savg SDT_PROBE3(racct, kernel, rusage, add, p, resource, amount); 542220137Strasz 543220137Strasz /* 544220137Strasz * We need proc lock to dereference p->p_ucred. 545220137Strasz */ 546220137Strasz PROC_LOCK_ASSERT(p, MA_OWNED); 547220137Strasz 548220137Strasz#ifdef RCTL 549220137Strasz error = rctl_enforce(p, resource, amount); 550223844Strasz if (error && RACCT_IS_DENIABLE(resource)) { 551288336Savg SDT_PROBE3(racct, kernel, rusage, add__failure, p, resource, 552288336Savg amount); 553220137Strasz return (error); 554220137Strasz } 555220137Strasz#endif 556284378Sjlh racct_adjust_resource(p->p_racct, resource, amount); 557220137Strasz racct_add_cred_locked(p->p_ucred, resource, amount); 558220137Strasz 559220137Strasz return (0); 560220137Strasz} 561220137Strasz 562225944Strasz/* 563225944Strasz * Increase allocation of 'resource' by 'amount' for process 'p'. 564225944Strasz * Return 0 if it's below limits, or errno, if it's not. 565225944Strasz */ 566225944Straszint 567225944Straszracct_add(struct proc *p, int resource, uint64_t amount) 568225944Strasz{ 569225944Strasz int error; 570225944Strasz 571282213Strasz if (!racct_enable) 572282213Strasz return (0); 573282213Strasz 574225944Strasz mtx_lock(&racct_lock); 575225944Strasz error = racct_add_locked(p, resource, amount); 576225944Strasz mtx_unlock(&racct_lock); 577225944Strasz return (error); 578225944Strasz} 579225944Strasz 580220137Straszstatic void 581220137Straszracct_add_cred_locked(struct ucred *cred, int resource, uint64_t amount) 582220137Strasz{ 583220137Strasz struct prison *pr; 584220137Strasz 585282213Strasz ASSERT_RACCT_ENABLED(); 586282213Strasz 587288336Savg SDT_PROBE3(racct, kernel, rusage, add__cred, cred, resource, amount); 588220137Strasz 589284378Sjlh racct_adjust_resource(cred->cr_ruidinfo->ui_racct, resource, amount); 590220137Strasz for (pr = cred->cr_prison; pr != NULL; pr = pr->pr_parent) 591284378Sjlh racct_adjust_resource(pr->pr_prison_racct->prr_racct, resource, 592221362Strasz amount); 593284378Sjlh racct_adjust_resource(cred->cr_loginclass->lc_racct, resource, amount); 594220137Strasz} 595220137Strasz 596220137Strasz/* 597220137Strasz * Increase allocation of 'resource' by 'amount' for credential 'cred'. 598220137Strasz * Doesn't check for limits and never fails. 599220137Strasz * 600220137Strasz * XXX: Shouldn't this ever return an error? 601220137Strasz */ 602220137Straszvoid 603220137Straszracct_add_cred(struct ucred *cred, int resource, uint64_t amount) 604220137Strasz{ 605220137Strasz 606282213Strasz if (!racct_enable) 607282213Strasz return; 608282213Strasz 609220137Strasz mtx_lock(&racct_lock); 610220137Strasz racct_add_cred_locked(cred, resource, amount); 611220137Strasz mtx_unlock(&racct_lock); 612220137Strasz} 613220137Strasz 614220137Strasz/* 615220137Strasz * Increase allocation of 'resource' by 'amount' for process 'p'. 616220137Strasz * Doesn't check for limits and never fails. 617220137Strasz */ 618220137Straszvoid 619220137Straszracct_add_force(struct proc *p, int resource, uint64_t amount) 620220137Strasz{ 621220137Strasz 622282213Strasz if (!racct_enable) 623282213Strasz return; 624282213Strasz 625288336Savg SDT_PROBE3(racct, kernel, rusage, add__force, p, resource, amount); 626220137Strasz 627220137Strasz /* 628220137Strasz * We need proc lock to dereference p->p_ucred. 629220137Strasz */ 630220137Strasz PROC_LOCK_ASSERT(p, MA_OWNED); 631220137Strasz 632220137Strasz mtx_lock(&racct_lock); 633284378Sjlh racct_adjust_resource(p->p_racct, resource, amount); 634220137Strasz mtx_unlock(&racct_lock); 635220137Strasz racct_add_cred(p->p_ucred, resource, amount); 636220137Strasz} 637220137Strasz 638220137Straszstatic int 639220137Straszracct_set_locked(struct proc *p, int resource, uint64_t amount) 640220137Strasz{ 641242139Strasz int64_t old_amount, decayed_amount; 642242139Strasz int64_t diff_proc, diff_cred; 643220137Strasz#ifdef RCTL 644220137Strasz int error; 645220137Strasz#endif 646220137Strasz 647282213Strasz ASSERT_RACCT_ENABLED(); 648282213Strasz 649288336Savg SDT_PROBE3(racct, kernel, rusage, set, p, resource, amount); 650220137Strasz 651220137Strasz /* 652220137Strasz * We need proc lock to dereference p->p_ucred. 653220137Strasz */ 654220137Strasz PROC_LOCK_ASSERT(p, MA_OWNED); 655220137Strasz 656242139Strasz old_amount = p->p_racct->r_resources[resource]; 657242139Strasz /* 658242139Strasz * The diffs may be negative. 659242139Strasz */ 660242139Strasz diff_proc = amount - old_amount; 661242139Strasz if (RACCT_IS_DECAYING(resource)) { 662242139Strasz /* 663242139Strasz * Resources in per-credential racct containers may decay. 664242139Strasz * If this is the case, we need to calculate the difference 665242139Strasz * between the new amount and the proportional value of the 666242139Strasz * old amount that has decayed in the ucred racct containers. 667242139Strasz */ 668242139Strasz decayed_amount = old_amount * RACCT_DECAY_FACTOR / FSCALE; 669242139Strasz diff_cred = amount - decayed_amount; 670242139Strasz } else 671242139Strasz diff_cred = diff_proc; 672220137Strasz#ifdef notyet 673242139Strasz KASSERT(diff_proc >= 0 || RACCT_CAN_DROP(resource), 674243088Strasz ("%s: usage of non-droppable resource %d dropping", __func__, 675220137Strasz resource)); 676220137Strasz#endif 677220137Strasz#ifdef RCTL 678242139Strasz if (diff_proc > 0) { 679242139Strasz error = rctl_enforce(p, resource, diff_proc); 680223844Strasz if (error && RACCT_IS_DENIABLE(resource)) { 681288336Savg SDT_PROBE3(racct, kernel, rusage, set__failure, p, 682288336Savg resource, amount); 683220137Strasz return (error); 684220137Strasz } 685220137Strasz } 686220137Strasz#endif 687284378Sjlh racct_adjust_resource(p->p_racct, resource, diff_proc); 688242139Strasz if (diff_cred > 0) 689242139Strasz racct_add_cred_locked(p->p_ucred, resource, diff_cred); 690242139Strasz else if (diff_cred < 0) 691242139Strasz racct_sub_cred_locked(p->p_ucred, resource, -diff_cred); 692220137Strasz 693220137Strasz return (0); 694220137Strasz} 695220137Strasz 696220137Strasz/* 697220137Strasz * Set allocation of 'resource' to 'amount' for process 'p'. 698220137Strasz * Return 0 if it's below limits, or errno, if it's not. 699220137Strasz * 700220137Strasz * Note that decreasing the allocation always returns 0, 701220137Strasz * even if it's above the limit. 702220137Strasz */ 703220137Straszint 704220137Straszracct_set(struct proc *p, int resource, uint64_t amount) 705220137Strasz{ 706220137Strasz int error; 707220137Strasz 708282213Strasz if (!racct_enable) 709282213Strasz return (0); 710282213Strasz 711220137Strasz mtx_lock(&racct_lock); 712220137Strasz error = racct_set_locked(p, resource, amount); 713220137Strasz mtx_unlock(&racct_lock); 714220137Strasz return (error); 715220137Strasz} 716220137Strasz 717242139Straszstatic void 718242139Straszracct_set_force_locked(struct proc *p, int resource, uint64_t amount) 719220137Strasz{ 720242139Strasz int64_t old_amount, decayed_amount; 721242139Strasz int64_t diff_proc, diff_cred; 722220137Strasz 723282213Strasz ASSERT_RACCT_ENABLED(); 724282213Strasz 725288336Savg SDT_PROBE3(racct, kernel, rusage, set, p, resource, amount); 726220137Strasz 727220137Strasz /* 728220137Strasz * We need proc lock to dereference p->p_ucred. 729220137Strasz */ 730220137Strasz PROC_LOCK_ASSERT(p, MA_OWNED); 731220137Strasz 732242139Strasz old_amount = p->p_racct->r_resources[resource]; 733242139Strasz /* 734242139Strasz * The diffs may be negative. 735242139Strasz */ 736242139Strasz diff_proc = amount - old_amount; 737242139Strasz if (RACCT_IS_DECAYING(resource)) { 738242139Strasz /* 739242139Strasz * Resources in per-credential racct containers may decay. 740242139Strasz * If this is the case, we need to calculate the difference 741242139Strasz * between the new amount and the proportional value of the 742242139Strasz * old amount that has decayed in the ucred racct containers. 743242139Strasz */ 744242139Strasz decayed_amount = old_amount * RACCT_DECAY_FACTOR / FSCALE; 745242139Strasz diff_cred = amount - decayed_amount; 746242139Strasz } else 747242139Strasz diff_cred = diff_proc; 748242139Strasz 749284378Sjlh racct_adjust_resource(p->p_racct, resource, diff_proc); 750242139Strasz if (diff_cred > 0) 751242139Strasz racct_add_cred_locked(p->p_ucred, resource, diff_cred); 752242139Strasz else if (diff_cred < 0) 753242139Strasz racct_sub_cred_locked(p->p_ucred, resource, -diff_cred); 754242139Strasz} 755242139Strasz 756242139Straszvoid 757242139Straszracct_set_force(struct proc *p, int resource, uint64_t amount) 758242139Strasz{ 759282213Strasz 760282213Strasz if (!racct_enable) 761282213Strasz return; 762282213Strasz 763220137Strasz mtx_lock(&racct_lock); 764242139Strasz racct_set_force_locked(p, resource, amount); 765220137Strasz mtx_unlock(&racct_lock); 766220137Strasz} 767220137Strasz 768220137Strasz/* 769220137Strasz * Returns amount of 'resource' the process 'p' can keep allocated. 770220137Strasz * Allocating more than that would be denied, unless the resource 771220137Strasz * is marked undeniable. Amount of already allocated resource does 772220137Strasz * not matter. 773220137Strasz */ 774220137Straszuint64_t 775220137Straszracct_get_limit(struct proc *p, int resource) 776220137Strasz{ 777220137Strasz 778282213Strasz if (!racct_enable) 779282213Strasz return (UINT64_MAX); 780282213Strasz 781220137Strasz#ifdef RCTL 782220137Strasz return (rctl_get_limit(p, resource)); 783220137Strasz#else 784220137Strasz return (UINT64_MAX); 785220137Strasz#endif 786220137Strasz} 787220137Strasz 788220137Strasz/* 789220137Strasz * Returns amount of 'resource' the process 'p' can keep allocated. 790220137Strasz * Allocating more than that would be denied, unless the resource 791220137Strasz * is marked undeniable. Amount of already allocated resource does 792220137Strasz * matter. 793220137Strasz */ 794220137Straszuint64_t 795220137Straszracct_get_available(struct proc *p, int resource) 796220137Strasz{ 797220137Strasz 798282213Strasz if (!racct_enable) 799282213Strasz return (UINT64_MAX); 800282213Strasz 801220137Strasz#ifdef RCTL 802220137Strasz return (rctl_get_available(p, resource)); 803220137Strasz#else 804220137Strasz return (UINT64_MAX); 805220137Strasz#endif 806220137Strasz} 807220137Strasz 808220137Strasz/* 809242139Strasz * Returns amount of the %cpu resource that process 'p' can add to its %cpu 810242139Strasz * utilization. Adding more than that would lead to the process being 811242139Strasz * throttled. 812242139Strasz */ 813242139Straszstatic int64_t 814242139Straszracct_pcpu_available(struct proc *p) 815242139Strasz{ 816242139Strasz 817282213Strasz ASSERT_RACCT_ENABLED(); 818282213Strasz 819242139Strasz#ifdef RCTL 820242139Strasz return (rctl_pcpu_available(p)); 821242139Strasz#else 822242139Strasz return (INT64_MAX); 823242139Strasz#endif 824242139Strasz} 825242139Strasz 826242139Strasz/* 827220137Strasz * Decrease allocation of 'resource' by 'amount' for process 'p'. 828220137Strasz */ 829220137Straszvoid 830220137Straszracct_sub(struct proc *p, int resource, uint64_t amount) 831220137Strasz{ 832220137Strasz 833282213Strasz if (!racct_enable) 834282213Strasz return; 835282213Strasz 836288336Savg SDT_PROBE3(racct, kernel, rusage, sub, p, resource, amount); 837220137Strasz 838220137Strasz /* 839220137Strasz * We need proc lock to dereference p->p_ucred. 840220137Strasz */ 841220137Strasz PROC_LOCK_ASSERT(p, MA_OWNED); 842242139Strasz KASSERT(RACCT_CAN_DROP(resource), 843243088Strasz ("%s: called for non-droppable resource %d", __func__, resource)); 844220137Strasz 845220137Strasz mtx_lock(&racct_lock); 846220137Strasz KASSERT(amount <= p->p_racct->r_resources[resource], 847243088Strasz ("%s: freeing %ju of resource %d, which is more " 848243088Strasz "than allocated %jd for %s (pid %d)", __func__, amount, resource, 849220137Strasz (intmax_t)p->p_racct->r_resources[resource], p->p_comm, p->p_pid)); 850220137Strasz 851284378Sjlh racct_adjust_resource(p->p_racct, resource, -amount); 852220137Strasz racct_sub_cred_locked(p->p_ucred, resource, amount); 853220137Strasz mtx_unlock(&racct_lock); 854220137Strasz} 855220137Strasz 856220137Straszstatic void 857220137Straszracct_sub_cred_locked(struct ucred *cred, int resource, uint64_t amount) 858220137Strasz{ 859220137Strasz struct prison *pr; 860220137Strasz 861282213Strasz ASSERT_RACCT_ENABLED(); 862282213Strasz 863288336Savg SDT_PROBE3(racct, kernel, rusage, sub__cred, cred, resource, amount); 864220137Strasz 865220137Strasz#ifdef notyet 866242139Strasz KASSERT(RACCT_CAN_DROP(resource), 867243088Strasz ("%s: called for resource %d which can not drop", __func__, 868220137Strasz resource)); 869220137Strasz#endif 870220137Strasz 871284378Sjlh racct_adjust_resource(cred->cr_ruidinfo->ui_racct, resource, -amount); 872220137Strasz for (pr = cred->cr_prison; pr != NULL; pr = pr->pr_parent) 873284378Sjlh racct_adjust_resource(pr->pr_prison_racct->prr_racct, resource, 874221362Strasz -amount); 875284378Sjlh racct_adjust_resource(cred->cr_loginclass->lc_racct, resource, -amount); 876220137Strasz} 877220137Strasz 878220137Strasz/* 879220137Strasz * Decrease allocation of 'resource' by 'amount' for credential 'cred'. 880220137Strasz */ 881220137Straszvoid 882220137Straszracct_sub_cred(struct ucred *cred, int resource, uint64_t amount) 883220137Strasz{ 884220137Strasz 885282213Strasz if (!racct_enable) 886282213Strasz return; 887282213Strasz 888220137Strasz mtx_lock(&racct_lock); 889220137Strasz racct_sub_cred_locked(cred, resource, amount); 890220137Strasz mtx_unlock(&racct_lock); 891220137Strasz} 892220137Strasz 893220137Strasz/* 894220137Strasz * Inherit resource usage information from the parent process. 895220137Strasz */ 896220137Straszint 897220137Straszracct_proc_fork(struct proc *parent, struct proc *child) 898220137Strasz{ 899220137Strasz int i, error = 0; 900220137Strasz 901282213Strasz if (!racct_enable) 902282213Strasz return (0); 903282213Strasz 904220137Strasz /* 905220137Strasz * Create racct for the child process. 906220137Strasz */ 907220137Strasz racct_create(&child->p_racct); 908220137Strasz 909220137Strasz PROC_LOCK(parent); 910220137Strasz PROC_LOCK(child); 911220137Strasz mtx_lock(&racct_lock); 912220137Strasz 913225981Strasz#ifdef RCTL 914225981Strasz error = rctl_proc_fork(parent, child); 915225981Strasz if (error != 0) 916225981Strasz goto out; 917225981Strasz#endif 918225981Strasz 919242139Strasz /* Init process cpu time. */ 920242139Strasz child->p_prev_runtime = 0; 921242139Strasz child->p_throttled = 0; 922242139Strasz 923220137Strasz /* 924220137Strasz * Inherit resource usage. 925220137Strasz */ 926220137Strasz for (i = 0; i <= RACCT_MAX; i++) { 927220137Strasz if (parent->p_racct->r_resources[i] == 0 || 928223844Strasz !RACCT_IS_INHERITABLE(i)) 929220137Strasz continue; 930220137Strasz 931220137Strasz error = racct_set_locked(child, i, 932220137Strasz parent->p_racct->r_resources[i]); 933225938Strasz if (error != 0) 934220137Strasz goto out; 935220137Strasz } 936220137Strasz 937225944Strasz error = racct_add_locked(child, RACCT_NPROC, 1); 938225944Strasz error += racct_add_locked(child, RACCT_NTHR, 1); 939225944Strasz 940220137Straszout: 941220137Strasz mtx_unlock(&racct_lock); 942220137Strasz PROC_UNLOCK(child); 943220137Strasz PROC_UNLOCK(parent); 944220137Strasz 945235787Strasz if (error != 0) 946235787Strasz racct_proc_exit(child); 947235787Strasz 948220137Strasz return (error); 949220137Strasz} 950220137Strasz 951225940Strasz/* 952225940Strasz * Called at the end of fork1(), to handle rules that require the process 953225940Strasz * to be fully initialized. 954225940Strasz */ 955220137Straszvoid 956225940Straszracct_proc_fork_done(struct proc *child) 957225940Strasz{ 958225940Strasz 959225940Strasz#ifdef RCTL 960282213Strasz if (!racct_enable) 961282213Strasz return; 962282213Strasz 963225940Strasz PROC_LOCK(child); 964225940Strasz mtx_lock(&racct_lock); 965225940Strasz rctl_enforce(child, RACCT_NPROC, 0); 966225940Strasz rctl_enforce(child, RACCT_NTHR, 0); 967225940Strasz mtx_unlock(&racct_lock); 968225940Strasz PROC_UNLOCK(child); 969225940Strasz#endif 970225940Strasz} 971225940Strasz 972225940Straszvoid 973220137Straszracct_proc_exit(struct proc *p) 974220137Strasz{ 975225364Strasz int i; 976220137Strasz uint64_t runtime; 977242139Strasz struct timeval wallclock; 978242139Strasz uint64_t pct_estimate, pct; 979220137Strasz 980282213Strasz if (!racct_enable) 981282213Strasz return; 982282213Strasz 983220137Strasz PROC_LOCK(p); 984220137Strasz /* 985220137Strasz * We don't need to calculate rux, proc_reap() has already done this. 986220137Strasz */ 987220137Strasz runtime = cputick2usec(p->p_rux.rux_runtime); 988220137Strasz#ifdef notyet 989220137Strasz KASSERT(runtime >= p->p_prev_runtime, ("runtime < p_prev_runtime")); 990220137Strasz#else 991220137Strasz if (runtime < p->p_prev_runtime) 992220137Strasz runtime = p->p_prev_runtime; 993220137Strasz#endif 994242139Strasz microuptime(&wallclock); 995242139Strasz timevalsub(&wallclock, &p->p_stats->p_start); 996242957Strasz if (wallclock.tv_sec > 0 || wallclock.tv_usec > 0) { 997242957Strasz pct_estimate = (1000000 * runtime * 100) / 998242957Strasz ((uint64_t)wallclock.tv_sec * 1000000 + 999242957Strasz wallclock.tv_usec); 1000242957Strasz } else 1001242957Strasz pct_estimate = 0; 1002242139Strasz pct = racct_getpcpu(p, pct_estimate); 1003242139Strasz 1004225364Strasz mtx_lock(&racct_lock); 1005225364Strasz racct_set_locked(p, RACCT_CPU, runtime); 1006242139Strasz racct_add_cred_locked(p->p_ucred, RACCT_PCTCPU, pct); 1007220137Strasz 1008225364Strasz for (i = 0; i <= RACCT_MAX; i++) { 1009225364Strasz if (p->p_racct->r_resources[i] == 0) 1010225364Strasz continue; 1011225364Strasz if (!RACCT_IS_RECLAIMABLE(i)) 1012225364Strasz continue; 1013225364Strasz racct_set_locked(p, i, 0); 1014225364Strasz } 1015225364Strasz 1016225364Strasz mtx_unlock(&racct_lock); 1017220137Strasz PROC_UNLOCK(p); 1018220137Strasz 1019220137Strasz#ifdef RCTL 1020220137Strasz rctl_racct_release(p->p_racct); 1021220137Strasz#endif 1022220137Strasz racct_destroy(&p->p_racct); 1023220137Strasz} 1024220137Strasz 1025220137Strasz/* 1026220137Strasz * Called after credentials change, to move resource utilisation 1027220137Strasz * between raccts. 1028220137Strasz */ 1029220137Straszvoid 1030220137Straszracct_proc_ucred_changed(struct proc *p, struct ucred *oldcred, 1031220137Strasz struct ucred *newcred) 1032220137Strasz{ 1033220137Strasz struct uidinfo *olduip, *newuip; 1034220137Strasz struct loginclass *oldlc, *newlc; 1035220137Strasz struct prison *oldpr, *newpr, *pr; 1036220137Strasz 1037282213Strasz if (!racct_enable) 1038282213Strasz return; 1039282213Strasz 1040220137Strasz PROC_LOCK_ASSERT(p, MA_NOTOWNED); 1041220137Strasz 1042220137Strasz newuip = newcred->cr_ruidinfo; 1043220137Strasz olduip = oldcred->cr_ruidinfo; 1044220137Strasz newlc = newcred->cr_loginclass; 1045220137Strasz oldlc = oldcred->cr_loginclass; 1046220137Strasz newpr = newcred->cr_prison; 1047220137Strasz oldpr = oldcred->cr_prison; 1048220137Strasz 1049220137Strasz mtx_lock(&racct_lock); 1050220137Strasz if (newuip != olduip) { 1051220137Strasz racct_sub_racct(olduip->ui_racct, p->p_racct); 1052220137Strasz racct_add_racct(newuip->ui_racct, p->p_racct); 1053220137Strasz } 1054220137Strasz if (newlc != oldlc) { 1055220137Strasz racct_sub_racct(oldlc->lc_racct, p->p_racct); 1056220137Strasz racct_add_racct(newlc->lc_racct, p->p_racct); 1057220137Strasz } 1058220137Strasz if (newpr != oldpr) { 1059220137Strasz for (pr = oldpr; pr != NULL; pr = pr->pr_parent) 1060221362Strasz racct_sub_racct(pr->pr_prison_racct->prr_racct, 1061221362Strasz p->p_racct); 1062220137Strasz for (pr = newpr; pr != NULL; pr = pr->pr_parent) 1063221362Strasz racct_add_racct(pr->pr_prison_racct->prr_racct, 1064221362Strasz p->p_racct); 1065220137Strasz } 1066220137Strasz mtx_unlock(&racct_lock); 1067220137Strasz 1068220137Strasz#ifdef RCTL 1069220137Strasz rctl_proc_ucred_changed(p, newcred); 1070220137Strasz#endif 1071220137Strasz} 1072220137Strasz 1073232598Straszvoid 1074232598Straszracct_move(struct racct *dest, struct racct *src) 1075232598Strasz{ 1076232598Strasz 1077282213Strasz ASSERT_RACCT_ENABLED(); 1078282213Strasz 1079232598Strasz mtx_lock(&racct_lock); 1080232598Strasz 1081232598Strasz racct_add_racct(dest, src); 1082232598Strasz racct_sub_racct(src, src); 1083232598Strasz 1084232598Strasz mtx_unlock(&racct_lock); 1085232598Strasz} 1086232598Strasz 1087220137Straszstatic void 1088242139Straszracct_proc_throttle(struct proc *p) 1089242139Strasz{ 1090242139Strasz struct thread *td; 1091242139Strasz#ifdef SMP 1092242139Strasz int cpuid; 1093242139Strasz#endif 1094242139Strasz 1095282213Strasz ASSERT_RACCT_ENABLED(); 1096242139Strasz PROC_LOCK_ASSERT(p, MA_OWNED); 1097242139Strasz 1098242139Strasz /* 1099242139Strasz * Do not block kernel processes. Also do not block processes with 1100242139Strasz * low %cpu utilization to improve interactivity. 1101242139Strasz */ 1102242139Strasz if (((p->p_flag & (P_SYSTEM | P_KTHREAD)) != 0) || 1103242139Strasz (p->p_racct->r_resources[RACCT_PCTCPU] <= pcpu_threshold)) 1104242139Strasz return; 1105242139Strasz p->p_throttled = 1; 1106242139Strasz 1107242139Strasz FOREACH_THREAD_IN_PROC(p, td) { 1108248298Strasz thread_lock(td); 1109242139Strasz switch (td->td_state) { 1110242139Strasz case TDS_RUNQ: 1111242139Strasz /* 1112242139Strasz * If the thread is on the scheduler run-queue, we can 1113242139Strasz * not just remove it from there. So we set the flag 1114242139Strasz * TDF_NEEDRESCHED for the thread, so that once it is 1115242139Strasz * running, it is taken off the cpu as soon as possible. 1116242139Strasz */ 1117242139Strasz td->td_flags |= TDF_NEEDRESCHED; 1118242139Strasz break; 1119242139Strasz case TDS_RUNNING: 1120242139Strasz /* 1121242139Strasz * If the thread is running, we request a context 1122242139Strasz * switch for it by setting the TDF_NEEDRESCHED flag. 1123242139Strasz */ 1124242139Strasz td->td_flags |= TDF_NEEDRESCHED; 1125242139Strasz#ifdef SMP 1126242139Strasz cpuid = td->td_oncpu; 1127242139Strasz if ((cpuid != NOCPU) && (td != curthread)) 1128242139Strasz ipi_cpu(cpuid, IPI_AST); 1129242139Strasz#endif 1130242139Strasz break; 1131242139Strasz default: 1132242139Strasz break; 1133242139Strasz } 1134248298Strasz thread_unlock(td); 1135242139Strasz } 1136242139Strasz} 1137242139Strasz 1138242139Straszstatic void 1139242139Straszracct_proc_wakeup(struct proc *p) 1140242139Strasz{ 1141282213Strasz 1142282213Strasz ASSERT_RACCT_ENABLED(); 1143282213Strasz 1144242139Strasz PROC_LOCK_ASSERT(p, MA_OWNED); 1145242139Strasz 1146242139Strasz if (p->p_throttled) { 1147242139Strasz p->p_throttled = 0; 1148242139Strasz wakeup(p->p_racct); 1149242139Strasz } 1150242139Strasz} 1151242139Strasz 1152242139Straszstatic void 1153242139Straszracct_decay_resource(struct racct *racct, void * res, void* dummy) 1154242139Strasz{ 1155242139Strasz int resource; 1156242139Strasz int64_t r_old, r_new; 1157242139Strasz 1158282213Strasz ASSERT_RACCT_ENABLED(); 1159290857Strasz mtx_assert(&racct_lock, MA_OWNED); 1160282213Strasz 1161242139Strasz resource = *(int *)res; 1162242139Strasz r_old = racct->r_resources[resource]; 1163242139Strasz 1164242139Strasz /* If there is nothing to decay, just exit. */ 1165242139Strasz if (r_old <= 0) 1166242139Strasz return; 1167242139Strasz 1168242139Strasz r_new = r_old * RACCT_DECAY_FACTOR / FSCALE; 1169242139Strasz racct->r_resources[resource] = r_new; 1170290857Strasz} 1171290857Strasz 1172290857Straszstatic void 1173290857Straszracct_decay_pre(void) 1174290857Strasz{ 1175290857Strasz 1176290857Strasz mtx_lock(&racct_lock); 1177290857Strasz} 1178290857Strasz 1179290857Straszstatic void 1180290857Straszracct_decay_post(void) 1181290857Strasz{ 1182290857Strasz 1183242139Strasz mtx_unlock(&racct_lock); 1184242139Strasz} 1185242139Strasz 1186242139Straszstatic void 1187242139Straszracct_decay(int resource) 1188242139Strasz{ 1189282213Strasz 1190282213Strasz ASSERT_RACCT_ENABLED(); 1191282213Strasz 1192290857Strasz ui_racct_foreach(racct_decay_resource, racct_decay_pre, 1193290857Strasz racct_decay_post, &resource, NULL); 1194290857Strasz loginclass_racct_foreach(racct_decay_resource, racct_decay_pre, 1195290857Strasz racct_decay_post, &resource, NULL); 1196290857Strasz prison_racct_foreach(racct_decay_resource, racct_decay_pre, 1197290857Strasz racct_decay_post, &resource, NULL); 1198242139Strasz} 1199242139Strasz 1200242139Straszstatic void 1201220137Straszracctd(void) 1202220137Strasz{ 1203220137Strasz struct thread *td; 1204220137Strasz struct proc *p; 1205220137Strasz struct timeval wallclock; 1206220137Strasz uint64_t runtime; 1207242139Strasz uint64_t pct, pct_estimate; 1208220137Strasz 1209282213Strasz ASSERT_RACCT_ENABLED(); 1210282213Strasz 1211220137Strasz for (;;) { 1212242139Strasz racct_decay(RACCT_PCTCPU); 1213242139Strasz 1214220137Strasz sx_slock(&allproc_lock); 1215220137Strasz 1216242139Strasz LIST_FOREACH(p, &zombproc, p_list) { 1217242139Strasz PROC_LOCK(p); 1218242139Strasz racct_set(p, RACCT_PCTCPU, 0); 1219242139Strasz PROC_UNLOCK(p); 1220242139Strasz } 1221242139Strasz 1222220137Strasz FOREACH_PROC_IN_SYSTEM(p) { 1223242139Strasz PROC_LOCK(p); 1224242139Strasz if (p->p_state != PRS_NORMAL) { 1225242139Strasz PROC_UNLOCK(p); 1226220137Strasz continue; 1227242139Strasz } 1228220137Strasz 1229220137Strasz microuptime(&wallclock); 1230220137Strasz timevalsub(&wallclock, &p->p_stats->p_start); 1231275121Skib PROC_STATLOCK(p); 1232232782Strasz FOREACH_THREAD_IN_PROC(p, td) 1233220137Strasz ruxagg(p, td); 1234220137Strasz runtime = cputick2usec(p->p_rux.rux_runtime); 1235275121Skib PROC_STATUNLOCK(p); 1236220137Strasz#ifdef notyet 1237220137Strasz KASSERT(runtime >= p->p_prev_runtime, 1238220137Strasz ("runtime < p_prev_runtime")); 1239220137Strasz#else 1240220137Strasz if (runtime < p->p_prev_runtime) 1241220137Strasz runtime = p->p_prev_runtime; 1242220137Strasz#endif 1243220137Strasz p->p_prev_runtime = runtime; 1244242957Strasz if (wallclock.tv_sec > 0 || wallclock.tv_usec > 0) { 1245242957Strasz pct_estimate = (1000000 * runtime * 100) / 1246242957Strasz ((uint64_t)wallclock.tv_sec * 1000000 + 1247242957Strasz wallclock.tv_usec); 1248242957Strasz } else 1249242957Strasz pct_estimate = 0; 1250242139Strasz pct = racct_getpcpu(p, pct_estimate); 1251220137Strasz mtx_lock(&racct_lock); 1252242139Strasz racct_set_force_locked(p, RACCT_PCTCPU, pct); 1253220137Strasz racct_set_locked(p, RACCT_CPU, runtime); 1254220137Strasz racct_set_locked(p, RACCT_WALLCLOCK, 1255233126Sjh (uint64_t)wallclock.tv_sec * 1000000 + 1256233126Sjh wallclock.tv_usec); 1257220137Strasz mtx_unlock(&racct_lock); 1258220137Strasz PROC_UNLOCK(p); 1259220137Strasz } 1260242139Strasz 1261242139Strasz /* 1262242139Strasz * To ensure that processes are throttled in a fair way, we need 1263242139Strasz * to iterate over all processes again and check the limits 1264242139Strasz * for %cpu resource only after ucred racct containers have been 1265242139Strasz * properly filled. 1266242139Strasz */ 1267242139Strasz FOREACH_PROC_IN_SYSTEM(p) { 1268242139Strasz PROC_LOCK(p); 1269242139Strasz if (p->p_state != PRS_NORMAL) { 1270242139Strasz PROC_UNLOCK(p); 1271242139Strasz continue; 1272242139Strasz } 1273242139Strasz 1274242139Strasz if (racct_pcpu_available(p) <= 0) 1275242139Strasz racct_proc_throttle(p); 1276242139Strasz else if (p->p_throttled) 1277242139Strasz racct_proc_wakeup(p); 1278242139Strasz PROC_UNLOCK(p); 1279242139Strasz } 1280220137Strasz sx_sunlock(&allproc_lock); 1281220137Strasz pause("-", hz); 1282220137Strasz } 1283220137Strasz} 1284220137Strasz 1285220137Straszstatic struct kproc_desc racctd_kp = { 1286220137Strasz "racctd", 1287220137Strasz racctd, 1288220137Strasz NULL 1289220137Strasz}; 1290220137Strasz 1291220137Straszstatic void 1292282213Straszracctd_init(void) 1293282213Strasz{ 1294282213Strasz if (!racct_enable) 1295282213Strasz return; 1296282213Strasz 1297282213Strasz kproc_start(&racctd_kp); 1298282213Strasz} 1299282213StraszSYSINIT(racctd, SI_SUB_RACCTD, SI_ORDER_FIRST, racctd_init, NULL); 1300282213Strasz 1301282213Straszstatic void 1302220137Straszracct_init(void) 1303220137Strasz{ 1304282213Strasz if (!racct_enable) 1305282213Strasz return; 1306220137Strasz 1307220137Strasz racct_zone = uma_zcreate("racct", sizeof(struct racct), 1308220137Strasz NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE); 1309220137Strasz /* 1310220137Strasz * XXX: Move this somewhere. 1311220137Strasz */ 1312221362Strasz prison0.pr_prison_racct = prison_racct_find("0"); 1313220137Strasz} 1314220137StraszSYSINIT(racct, SI_SUB_RACCT, SI_ORDER_FIRST, racct_init, NULL); 1315220137Strasz 1316220137Strasz#endif /* !RACCT */ 1317