+++ /dev/null
-/*
- * Ioctls that can be done on a perf counter fd:
- */
-#define PERF_COUNTER_IOC_ENABLE _IO('$', 0)
-#define PERF_COUNTER_IOC_DISABLE _IO('$', 1)
-
-/*
- * prctl(PR_TASK_PERF_COUNTERS_DISABLE) will (cheaply) disable all
- * counters in the current task.
- */
-#define PR_TASK_PERF_COUNTERS_DISABLE 31
-#define PR_TASK_PERF_COUNTERS_ENABLE 32
-
-#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
-
-#define rdclock() \
-({ \
- struct timespec ts; \
- \
- clock_gettime(CLOCK_MONOTONIC, &ts); \
- ts.tv_sec * 1000000000ULL + ts.tv_nsec; \
-})
-
-/*
- * Pick up some kernel type conventions:
- */
-#define __user
-#define asmlinkage
-
-typedef unsigned int __u32;
-typedef unsigned long long __u64;
-typedef long long __s64;
-
-/*
- * User-space ABI bits:
- */
-
-/*
- * Generalized performance counter event types, used by the hw_event.type
- * parameter of the sys_perf_counter_open() syscall:
- */
-enum hw_event_types {
- /*
- * Common hardware events, generalized by the kernel:
- */
- PERF_COUNT_CPU_CYCLES = 0,
- PERF_COUNT_INSTRUCTIONS = 1,
- PERF_COUNT_CACHE_REFERENCES = 2,
- PERF_COUNT_CACHE_MISSES = 3,
- PERF_COUNT_BRANCH_INSTRUCTIONS = 4,
- PERF_COUNT_BRANCH_MISSES = 5,
- PERF_COUNT_BUS_CYCLES = 6,
-
- PERF_HW_EVENTS_MAX = 7,
-
- /*
- * Special "software" counters provided by the kernel, even if
- * the hardware does not support performance counters. These
- * counters measure various physical and sw events of the
- * kernel (and allow the profiling of them as well):
- */
- PERF_COUNT_CPU_CLOCK = -1,
- PERF_COUNT_TASK_CLOCK = -2,
- PERF_COUNT_PAGE_FAULTS = -3,
- PERF_COUNT_CONTEXT_SWITCHES = -4,
- PERF_COUNT_CPU_MIGRATIONS = -5,
-
- PERF_SW_EVENTS_MIN = -6,
-};
-
-/*
- * IRQ-notification data record type:
- */
-enum perf_counter_record_type {
- PERF_RECORD_SIMPLE = 0,
- PERF_RECORD_IRQ = 1,
- PERF_RECORD_GROUP = 2,
-};
-
-/*
- * Hardware event to monitor via a performance monitoring counter:
- */
-struct perf_counter_hw_event {
- __s64 type;
-
- __u64 irq_period;
- __u64 record_type;
- __u64 read_format;
-
- __u64 disabled : 1, /* off by default */
- nmi : 1, /* NMI sampling */
- raw : 1, /* raw event type */
- inherit : 1, /* children inherit it */
- pinned : 1, /* must always be on PMU */
- exclusive : 1, /* only group on PMU */
- exclude_user : 1, /* don't count user */
- exclude_kernel : 1, /* ditto kernel */
- exclude_hv : 1, /* ditto hypervisor */
- exclude_idle : 1, /* don't count when idle */
-
- __reserved_1 : 54;
-
- __u32 extra_config_len;
- __u32 __reserved_4;
-
- __u64 __reserved_2;
- __u64 __reserved_3;
-};
-
-
-#ifdef __x86_64__
-# define __NR_perf_counter_open 295
-#endif
-
-#ifdef __i386__
-# define __NR_perf_counter_open 333
-#endif
-
-#ifdef __powerpc__
-#define __NR_perf_counter_open 319
-#endif
-
-asmlinkage int sys_perf_counter_open(
-
- struct perf_counter_hw_event *hw_event_uptr __user,
- pid_t pid,
- int cpu,
- int group_fd,
- unsigned long flags)
-{
- int ret;
-
- ret = syscall(
- __NR_perf_counter_open, hw_event_uptr, pid, cpu, group_fd, flags);
-#if defined(__x86_64__) || defined(__i386__)
- if (ret < 0 && ret > -4096) {
- errno = -ret;
- ret = -1;
- }
-#endif
- return ret;
-}
+++ /dev/null
-/*
- * perfstat: /usr/bin/time -alike performance counter statistics utility
- *
- * It summarizes the counter events of all tasks (and child tasks),
- * covering all CPUs that the command (or workload) executes on.
- * It only counts the per-task events of the workload started,
- * independent of how many other tasks run on those CPUs.
- *
- * Build with: cc -O2 -g -lrt -Wall -W -o perfstat perfstat.c
- *
- * Sample output:
- *
-
- $ ./perfstat -e 1 -e 3 -e 5 ls -lR /usr/include/ >/dev/null
-
- Performance counter stats for 'ls':
-
- 163516953 instructions
- 2295 cache-misses
- 2855182 branch-misses
-
- *
- * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
- *
- * Released under the GPLv2 (not later).
- *
- * Percpu counter support by: Yanmin Zhang <yanmin_zhang@linux.intel.com>
- * Symbolic event options by: Wu Fengguang <fengguang.wu@intel.com>
- */
-#define _GNU_SOURCE
-
-#include <assert.h>
-#include <getopt.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <ctype.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <time.h>
-
-#include <sys/syscall.h>
-#include <sys/ioctl.h>
-#include <sys/prctl.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/time.h>
-#include <sys/wait.h>
-#include <sys/uio.h>
-
-#include <linux/unistd.h>
-
-#include "perfcounters.h"
-
-static int nr_cpus = 0;
-
-static int system_wide = 0;
-
-static void display_help(void)
-{
- unsigned int i;
- int e;
-
- printf(
- "Usage: perfstat [<events...>] <cmd...>\n\n"
- "PerfStat Options (up to %d event types can be specified):\n\n",
- MAX_COUNTERS);
- printf(
- " -e EVENT --event=EVENT # symbolic-name abbreviations");
-
- for (i = 0, e = PERF_HW_EVENTS_MAX; i < ARRAY_SIZE(event_symbols); i++) {
- if (e != event_symbols[i].event) {
- e = event_symbols[i].event;
- printf(
- "\n %2d: %-20s", e, event_symbols[i].symbol);
- } else
- printf(" %s", event_symbols[i].symbol);
- }
-
- printf("\n"
- " rNNN: raw event type\n\n"
- " -s # system-wide collection\n\n"
- " -c <cmd..> --command=<cmd..> # command+arguments to be timed.\n"
- "\n");
- exit(0);
-}
-
-static void process_options(int argc, char *argv[])
-{
- for (;;) {
- int option_index = 0;
- /** Options for getopt */
- static struct option long_options[] = {
- {"event", required_argument, NULL, 'e'},
- {"help", no_argument, NULL, 'h'},
- {"command", no_argument, NULL, 'c'},
- {NULL, 0, NULL, 0 }
- };
- int c = getopt_long(argc, argv, "+:e:c:s",
- long_options, &option_index);
- if (c == -1)
- break;
-
- switch (c) {
- case 'c':
- break;
- case 's':
- system_wide = 1;
- break;
- case 'e':
- parse_events(optarg);
- break;
- default:
- break;
- }
- }
- if (optind == argc)
- goto err;
-
- if (!nr_counters)
- nr_counters = 8;
- return;
-
-err:
- display_help();
-}
-
-char fault_here[1000000];
-
-static int fd[MAX_NR_CPUS][MAX_COUNTERS];
-
-static void create_counter(int counter)
-{
- struct perf_counter_hw_event hw_event;
-
- memset(&hw_event, 0, sizeof(hw_event));
- hw_event.type = event_id[counter];
- hw_event.raw = event_raw[counter];
- hw_event.record_type = PERF_RECORD_SIMPLE;
- hw_event.nmi = 0;
-
- if (system_wide) {
- int cpu;
- for (cpu = 0; cpu < nr_cpus; cpu ++) {
- fd[cpu][counter] = sys_perf_counter_open(&hw_event, -1, cpu, -1, 0);
- if (fd[cpu][counter] < 0) {
- printf("perfstat error: syscall returned with %d (%s)\n",
- fd[cpu][counter], strerror(errno));
- exit(-1);
- }
-
- }
- } else {
- hw_event.inherit = 1;
- hw_event.disabled = 1;
-
- fd[0][counter] = sys_perf_counter_open(&hw_event, 0, -1, -1, 0);
- if (fd[0][counter] < 0) {
- printf("perfstat error: syscall returned with %d (%s)\n",
- fd[0][counter], strerror(errno));
- exit(-1);
- }
- }
-}
-
-
-int main(int argc, char *argv[])
-{
- unsigned long long t0, t1;
- int counter;
- ssize_t res;
- int status;
- int pid;
-
- process_options(argc, argv);
-
- if (system_wide) {
- nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
- assert(nr_cpus <= MAX_NR_CPUS);
- assert(nr_cpus >= 0);
- } else
- nr_cpus = 1;
-
- for (counter = 0; counter < nr_counters; counter++)
- create_counter(counter);
-
- argc -= optind;
- argv += optind;
-
- /*
- * Enable counters and exec the command:
- */
- t0 = rdclock();
- prctl(PR_TASK_PERF_COUNTERS_ENABLE);
-
- if ((pid = fork()) < 0)
- perror("failed to fork");
- if (!pid) {
- if (execvp(argv[0], argv)) {
- perror(argv[0]);
- exit(-1);
- }
- }
- while (wait(&status) >= 0)
- ;
- prctl(PR_TASK_PERF_COUNTERS_DISABLE);
- t1 = rdclock();
-
- fflush(stdout);
-
- fprintf(stderr, "\n");
- fprintf(stderr, " Performance counter stats for \'%s\':\n",
- argv[0]);
- fprintf(stderr, "\n");
-
- for (counter = 0; counter < nr_counters; counter++) {
- int cpu;
- __u64 count, single_count;
-
- count = 0;
- for (cpu = 0; cpu < nr_cpus; cpu ++) {
- res = read(fd[cpu][counter],
- (char *) &single_count, sizeof(single_count));
- assert(res == sizeof(single_count));
- count += single_count;
- }
-
- if (!event_raw[counter] &&
- (event_id[counter] == PERF_COUNT_CPU_CLOCK ||
- event_id[counter] == PERF_COUNT_TASK_CLOCK)) {
-
- double msecs = (double)count / 1000000;
-
- fprintf(stderr, " %14.6f %-20s (msecs)\n",
- msecs, event_name(counter));
- } else {
- fprintf(stderr, " %14Ld %-20s (events)\n",
- count, event_name(counter));
- }
- if (!counter)
- fprintf(stderr, "\n");
- }
- fprintf(stderr, "\n");
- fprintf(stderr, " Wall-clock time elapsed: %12.6f msecs\n",
- (double)(t1-t0)/1e6);
- fprintf(stderr, "\n");
-
- return 0;
-}
projects / mirror_ubuntu-jammy-kernel.git / commitdiff