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hwpmc_logging.c (172836) hwpmc_logging.c (174395)
1/*-
1/*-
2 * Copyright (c) 2005 Joseph Koshy
2 * Copyright (c) 2005-2007 Joseph Koshy
3 * Copyright (c) 2007 The FreeBSD Foundation
3 * All rights reserved.
4 *
4 * All rights reserved.
5 *
6 * Portions of this software were developed by A. Joseph Koshy under
7 * sponsorship from the FreeBSD Foundation and Google, Inc.
8 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.

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25 *
26 */
27
28/*
29 * Logging code for hwpmc(4)
30 */
31
32#include <sys/cdefs.h>
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.

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29 *
30 */
31
32/*
33 * Logging code for hwpmc(4)
34 */
35
36#include <sys/cdefs.h>
33__FBSDID("$FreeBSD: head/sys/dev/hwpmc/hwpmc_logging.c 172836 2007-10-20 23:23:23Z julian $");
37__FBSDID("$FreeBSD: head/sys/dev/hwpmc/hwpmc_logging.c 174395 2007-12-07 08:20:17Z jkoshy $");
34
35#include <sys/param.h>
36#include <sys/file.h>
37#include <sys/kernel.h>
38#include <sys/kthread.h>
39#include <sys/lock.h>
40#include <sys/module.h>
41#include <sys/mutex.h>

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59 * kern.hwpmc.logbuffersize -- size of the per-cpu owner buffers.
60 */
61
62static int pmclog_buffer_size = PMC_LOG_BUFFER_SIZE;
63TUNABLE_INT(PMC_SYSCTL_NAME_PREFIX "logbuffersize", &pmclog_buffer_size);
64SYSCTL_INT(_kern_hwpmc, OID_AUTO, logbuffersize, CTLFLAG_TUN|CTLFLAG_RD,
65 &pmclog_buffer_size, 0, "size of log buffers in kilobytes");
66
38
39#include <sys/param.h>
40#include <sys/file.h>
41#include <sys/kernel.h>
42#include <sys/kthread.h>
43#include <sys/lock.h>
44#include <sys/module.h>
45#include <sys/mutex.h>

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63 * kern.hwpmc.logbuffersize -- size of the per-cpu owner buffers.
64 */
65
66static int pmclog_buffer_size = PMC_LOG_BUFFER_SIZE;
67TUNABLE_INT(PMC_SYSCTL_NAME_PREFIX "logbuffersize", &pmclog_buffer_size);
68SYSCTL_INT(_kern_hwpmc, OID_AUTO, logbuffersize, CTLFLAG_TUN|CTLFLAG_RD,
69 &pmclog_buffer_size, 0, "size of log buffers in kilobytes");
70
67
68/*
69 * kern.hwpmc.nbuffer -- number of global log buffers
70 */
71
72static int pmc_nlogbuffers = PMC_NLOGBUFFERS;
73TUNABLE_INT(PMC_SYSCTL_NAME_PREFIX "nbuffers", &pmc_nlogbuffers);
74SYSCTL_INT(_kern_hwpmc, OID_AUTO, nbuffers, CTLFLAG_TUN|CTLFLAG_RD,
75 &pmc_nlogbuffers, 0, "number of global log buffers");

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91 (D)->plb_base = (D)->plb_ptr = ((char *) (D)) + \
92 __roundup; \
93 } while (0)
94
95
96/*
97 * Log file record constructors.
98 */
71/*
72 * kern.hwpmc.nbuffer -- number of global log buffers
73 */
74
75static int pmc_nlogbuffers = PMC_NLOGBUFFERS;
76TUNABLE_INT(PMC_SYSCTL_NAME_PREFIX "nbuffers", &pmc_nlogbuffers);
77SYSCTL_INT(_kern_hwpmc, OID_AUTO, nbuffers, CTLFLAG_TUN|CTLFLAG_RD,
78 &pmc_nlogbuffers, 0, "number of global log buffers");

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94 (D)->plb_base = (D)->plb_ptr = ((char *) (D)) + \
95 __roundup; \
96 } while (0)
97
98
99/*
100 * Log file record constructors.
101 */
99
100#define _PMCLOG_TO_HEADER(T,L) \
101 ((PMCLOG_HEADER_MAGIC << 24) | \
102 (PMCLOG_TYPE_ ## T << 16) | \
103 ((L) & 0xFFFF))
104
105/* reserve LEN bytes of space and initialize the entry header */
106#define _PMCLOG_RESERVE(PO,TYPE,LEN,ACTION) do { \
107 uint32_t *_le; \

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130 pmclog_release((PO)); \
131 } while (0)
132
133
134/*
135 * Assertions about the log file format.
136 */
137
102#define _PMCLOG_TO_HEADER(T,L) \
103 ((PMCLOG_HEADER_MAGIC << 24) | \
104 (PMCLOG_TYPE_ ## T << 16) | \
105 ((L) & 0xFFFF))
106
107/* reserve LEN bytes of space and initialize the entry header */
108#define _PMCLOG_RESERVE(PO,TYPE,LEN,ACTION) do { \
109 uint32_t *_le; \

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132 pmclog_release((PO)); \
133 } while (0)
134
135
136/*
137 * Assertions about the log file format.
138 */
139
140CTASSERT(sizeof(struct pmclog_callchain) == 6*4 +
141 PMC_CALLCHAIN_DEPTH_MAX*sizeof(uintfptr_t));
138CTASSERT(sizeof(struct pmclog_closelog) == 3*4);
139CTASSERT(sizeof(struct pmclog_dropnotify) == 3*4);
140CTASSERT(sizeof(struct pmclog_map_in) == PATH_MAX +
141 4*4 + sizeof(uintfptr_t));
142CTASSERT(offsetof(struct pmclog_map_in,pl_pathname) ==
143 4*4 + sizeof(uintfptr_t));
144CTASSERT(sizeof(struct pmclog_map_out) == 4*4 + 2*sizeof(uintfptr_t));
145CTASSERT(sizeof(struct pmclog_pcsample) == 6*4 + sizeof(uintfptr_t));

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705
706 error:
707 mtx_unlock(&pmc_kthread_mtx);
708
709 return error;
710}
711
712
142CTASSERT(sizeof(struct pmclog_closelog) == 3*4);
143CTASSERT(sizeof(struct pmclog_dropnotify) == 3*4);
144CTASSERT(sizeof(struct pmclog_map_in) == PATH_MAX +
145 4*4 + sizeof(uintfptr_t));
146CTASSERT(offsetof(struct pmclog_map_in,pl_pathname) ==
147 4*4 + sizeof(uintfptr_t));
148CTASSERT(sizeof(struct pmclog_map_out) == 4*4 + 2*sizeof(uintfptr_t));
149CTASSERT(sizeof(struct pmclog_pcsample) == 6*4 + sizeof(uintfptr_t));

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709
710 error:
711 mtx_unlock(&pmc_kthread_mtx);
712
713 return error;
714}
715
716
713/*
714 * Send a 'close log' event to the log file.
715 */
717void
718pmclog_process_callchain(struct pmc *pm, struct pmc_sample *ps)
719{
720 int n, recordlen;
721 uint32_t flags;
722 struct pmc_owner *po;
716
723
724 PMCDBG(LOG,SAM,1,"pm=%p pid=%d n=%d", pm, ps->ps_pid,
725 ps->ps_nsamples);
726
727 recordlen = offsetof(struct pmclog_callchain, pl_pc) +
728 ps->ps_nsamples * sizeof(uintfptr_t);
729 po = pm->pm_owner;
730 flags = PMC_CALLCHAIN_TO_CPUFLAGS(ps->ps_cpu,ps->ps_flags);
731 PMCLOG_RESERVE(po, CALLCHAIN, recordlen);
732 PMCLOG_EMIT32(ps->ps_pid);
733 PMCLOG_EMIT32(pm->pm_id);
734 PMCLOG_EMIT32(flags);
735 for (n = 0; n < ps->ps_nsamples; n++)
736 PMCLOG_EMITADDR(ps->ps_pc[n]);
737 PMCLOG_DESPATCH(po);
738}
739
717void
718pmclog_process_closelog(struct pmc_owner *po)
719{
720 PMCLOG_RESERVE(po,CLOSELOG,sizeof(struct pmclog_closelog));
721 PMCLOG_DESPATCH(po);
722}
723
724void

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756 PMCLOG_RESERVE(po, MAP_OUT, sizeof(struct pmclog_map_out));
757 PMCLOG_EMIT32(pid);
758 PMCLOG_EMITADDR(start);
759 PMCLOG_EMITADDR(end);
760 PMCLOG_DESPATCH(po);
761}
762
763void
740void
741pmclog_process_closelog(struct pmc_owner *po)
742{
743 PMCLOG_RESERVE(po,CLOSELOG,sizeof(struct pmclog_closelog));
744 PMCLOG_DESPATCH(po);
745}
746
747void

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779 PMCLOG_RESERVE(po, MAP_OUT, sizeof(struct pmclog_map_out));
780 PMCLOG_EMIT32(pid);
781 PMCLOG_EMITADDR(start);
782 PMCLOG_EMITADDR(end);
783 PMCLOG_DESPATCH(po);
784}
785
786void
764pmclog_process_pcsample(struct pmc *pm, struct pmc_sample *ps)
765{
766 struct pmc_owner *po;
767
768 PMCDBG(LOG,SAM,1,"pm=%p pid=%d pc=%p", pm, ps->ps_pid,
769 (void *) ps->ps_pc);
770
771 po = pm->pm_owner;
772
773 PMCLOG_RESERVE(po, PCSAMPLE, sizeof(struct pmclog_pcsample));
774 PMCLOG_EMIT32(ps->ps_pid);
775 PMCLOG_EMITADDR(ps->ps_pc);
776 PMCLOG_EMIT32(pm->pm_id);
777 PMCLOG_EMIT32(ps->ps_usermode);
778 PMCLOG_DESPATCH(po);
779}
780
781void
782pmclog_process_pmcallocate(struct pmc *pm)
783{
784 struct pmc_owner *po;
785
786 po = pm->pm_owner;
787
788 PMCDBG(LOG,ALL,1, "pm=%p", pm);
789

--- 210 unchanged lines hidden --- 		787pmclog_process_pmcallocate(struct pmc *pm)
788{
789 struct pmc_owner *po;
790
791 po = pm->pm_owner;
792
793 PMCDBG(LOG,ALL,1, "pm=%p", pm);
794

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