vmm_stat.c revision 270071
1117632Sharti/*- 2117632Sharti * Copyright (c) 2011 NetApp, Inc. 3117632Sharti * All rights reserved. 4117632Sharti * 5117632Sharti * Redistribution and use in source and binary forms, with or without 6117632Sharti * modification, are permitted provided that the following conditions 7117632Sharti * are met: 8117632Sharti * 1. Redistributions of source code must retain the above copyright 9117632Sharti * notice, this list of conditions and the following disclaimer. 10117632Sharti * 2. Redistributions in binary form must reproduce the above copyright 11117632Sharti * notice, this list of conditions and the following disclaimer in the 12117632Sharti * documentation and/or other materials provided with the distribution. 13117632Sharti * 14117632Sharti * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND 15117632Sharti * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16117632Sharti * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17117632Sharti * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE 18117632Sharti * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19117632Sharti * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20117632Sharti * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21117632Sharti * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22117632Sharti * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23117632Sharti * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24117632Sharti * SUCH DAMAGE. 25117632Sharti * 26117632Sharti * $FreeBSD: stable/10/sys/amd64/vmm/vmm_stat.c 270071 2014-08-17 01:00:42Z grehan $ 27117632Sharti */ 28117632Sharti 29117632Sharti#include <sys/cdefs.h> 30117632Sharti__FBSDID("$FreeBSD: stable/10/sys/amd64/vmm/vmm_stat.c 270071 2014-08-17 01:00:42Z grehan $"); 31117632Sharti 32117632Sharti#include <sys/param.h> 33117632Sharti#include <sys/kernel.h> 34117632Sharti#include <sys/systm.h> 35117632Sharti#include <sys/malloc.h> 36117632Sharti#include <sys/smp.h> 37117632Sharti 38117632Sharti#include <machine/vmm.h> 39117632Sharti#include "vmm_util.h" 40117632Sharti#include "vmm_stat.h" 41117632Sharti 42117632Sharti/* 43117632Sharti * 'vst_num_elems' is the total number of addressable statistic elements 44117632Sharti * 'vst_num_types' is the number of unique statistic types 45117632Sharti * 46117632Sharti * It is always true that 'vst_num_elems' is greater than or equal to 47117632Sharti * 'vst_num_types'. This is because a stat type may represent more than 48117632Sharti * one element (for e.g. VMM_STAT_ARRAY). 49117632Sharti */ 50117632Shartistatic int vst_num_elems, vst_num_types; 51117632Shartistatic struct vmm_stat_type *vsttab[MAX_VMM_STAT_ELEMS]; 52117632Sharti 53117632Shartistatic MALLOC_DEFINE(M_VMM_STAT, "vmm stat", "vmm stat"); 54117632Sharti 55117632Sharti#define vst_size ((size_t)vst_num_elems * sizeof(uint64_t)) 56117632Sharti 57117632Shartivoid 58117632Shartivmm_stat_register(void *arg) 59117632Sharti{ 60117632Sharti struct vmm_stat_type *vst = arg; 61117632Sharti 62117632Sharti /* We require all stats to identify themselves with a description */ 63117632Sharti if (vst->desc == NULL) 64117632Sharti return; 65117632Sharti 66117632Sharti if (vst->scope == VMM_STAT_SCOPE_INTEL && !vmm_is_intel()) 67117632Sharti return; 68117632Sharti 69117632Sharti if (vst->scope == VMM_STAT_SCOPE_AMD && !vmm_is_amd()) 70117632Sharti return; 71117632Sharti 72117632Sharti if (vst_num_elems + vst->nelems >= MAX_VMM_STAT_ELEMS) { 73117632Sharti printf("Cannot accomodate vmm stat type \"%s\"!\n", vst->desc); 74117632Sharti return; 75117632Sharti } 76117632Sharti 77117632Sharti vst->index = vst_num_elems; 78117632Sharti vst_num_elems += vst->nelems; 79117632Sharti 80117632Sharti vsttab[vst_num_types++] = vst; 81117632Sharti} 82117632Sharti 83117632Shartiint 84117632Shartivmm_stat_copy(struct vm *vm, int vcpu, int *num_stats, uint64_t *buf) 85117632Sharti{ 86117632Sharti int i; 87117632Sharti uint64_t *stats; 88117632Sharti 89117632Sharti if (vcpu < 0 || vcpu >= VM_MAXCPU) 90117632Sharti return (EINVAL); 91117632Sharti 92117632Sharti stats = vcpu_stats(vm, vcpu); 93117632Sharti for (i = 0; i < vst_num_elems; i++) 94117632Sharti buf[i] = stats[i]; 95117632Sharti *num_stats = vst_num_elems; 96117632Sharti return (0); 97117632Sharti} 98117632Sharti 99117632Shartivoid * 100117632Shartivmm_stat_alloc(void) 101117632Sharti{ 102117632Sharti 103117632Sharti return (malloc(vst_size, M_VMM_STAT, M_WAITOK)); 104117632Sharti} 105117632Sharti 106117632Shartivoid 107117632Shartivmm_stat_init(void *vp) 108117632Sharti{ 109117632Sharti 110117632Sharti bzero(vp, vst_size); 111117632Sharti} 112117632Sharti 113117632Shartivoid 114117632Shartivmm_stat_free(void *vp) 115117632Sharti{ 116117632Sharti free(vp, M_VMM_STAT); 117117632Sharti} 118117632Sharti 119117632Shartiint 120117632Shartivmm_stat_desc_copy(int index, char *buf, int bufsize) 121117632Sharti{ 122117632Sharti int i; 123117632Sharti struct vmm_stat_type *vst; 124117632Sharti 125117632Sharti for (i = 0; i < vst_num_types; i++) { 126117632Sharti vst = vsttab[i]; 127117632Sharti if (index >= vst->index && index < vst->index + vst->nelems) { 128117632Sharti if (vst->nelems > 1) { 129117632Sharti snprintf(buf, bufsize, "%s[%d]", 130117632Sharti vst->desc, index - vst->index); 131117632Sharti } else { 132117632Sharti strlcpy(buf, vst->desc, bufsize); 133117632Sharti } 134117632Sharti return (0); /* found it */ 135117632Sharti } 136117632Sharti } 137117632Sharti 138117632Sharti return (EINVAL); 139117632Sharti} 140117632Sharti 141117632Sharti/* global statistics */ 142117632ShartiVMM_STAT(VCPU_MIGRATIONS, "vcpu migration across host cpus"); 143117632ShartiVMM_STAT(VMEXIT_COUNT, "total number of vm exits"); 144117632ShartiVMM_STAT(VMEXIT_EXTINT, "vm exits due to external interrupt"); 145117632ShartiVMM_STAT(VMEXIT_HLT, "number of times hlt was intercepted"); 146117632ShartiVMM_STAT(VMEXIT_CR_ACCESS, "number of times %cr access was intercepted"); 147117632ShartiVMM_STAT(VMEXIT_RDMSR, "number of times rdmsr was intercepted"); 148117632ShartiVMM_STAT(VMEXIT_WRMSR, "number of times wrmsr was intercepted"); 149117632ShartiVMM_STAT(VMEXIT_MTRAP, "number of monitor trap exits"); 150117632ShartiVMM_STAT(VMEXIT_PAUSE, "number of times pause was intercepted"); 151117632ShartiVMM_STAT(VMEXIT_INTR_WINDOW, "vm exits due to interrupt window opening"); 152117632ShartiVMM_STAT(VMEXIT_NMI_WINDOW, "vm exits due to nmi window opening"); 153117632ShartiVMM_STAT(VMEXIT_INOUT, "number of times in/out was intercepted"); 154117632ShartiVMM_STAT(VMEXIT_CPUID, "number of times cpuid was intercepted"); 155117632ShartiVMM_STAT(VMEXIT_NESTED_FAULT, "vm exits due to nested page fault"); 156117632ShartiVMM_STAT(VMEXIT_INST_EMUL, "vm exits for instruction emulation"); 157117632ShartiVMM_STAT(VMEXIT_UNKNOWN, "number of vm exits for unknown reason"); 158117632ShartiVMM_STAT(VMEXIT_ASTPENDING, "number of times astpending at exit"); 159117632ShartiVMM_STAT(VMEXIT_USERSPACE, "number of vm exits handled in userspace"); 160117632ShartiVMM_STAT(VMEXIT_RENDEZVOUS, "number of times rendezvous pending at exit"); 161117632ShartiVMM_STAT(VMEXIT_EXCEPTION, "number of vm exits due to exceptions"); 162117632Sharti