/*
- * kerneltop.c: show top kernel functions - performance counters showcase
-
- Build with:
-
- cc -O6 -Wall -c -o kerneltop.o kerneltop.c -lrt
-
- Sample output:
-
-------------------------------------------------------------------------------
- KernelTop: 2669 irqs/sec [NMI, cache-misses/cache-refs], (all, cpu: 2)
-------------------------------------------------------------------------------
-
- weight RIP kernel function
- ______ ________________ _______________
-
- 35.20 - ffffffff804ce74b : skb_copy_and_csum_dev
- 33.00 - ffffffff804cb740 : sock_alloc_send_skb
- 31.26 - ffffffff804ce808 : skb_push
- 22.43 - ffffffff80510004 : tcp_established_options
- 19.00 - ffffffff8027d250 : find_get_page
- 15.76 - ffffffff804e4fc9 : eth_type_trans
- 15.20 - ffffffff804d8baa : dst_release
- 14.86 - ffffffff804cf5d8 : skb_release_head_state
- 14.00 - ffffffff802217d5 : read_hpet
- 12.00 - ffffffff804ffb7f : __ip_local_out
- 11.97 - ffffffff804fc0c8 : ip_local_deliver_finish
- 8.54 - ffffffff805001a3 : ip_queue_xmit
- */
-
-/*
- * perfstat: /usr/bin/time -alike performance counter statistics utility
+ * perf stat: /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.
Sample output:
- $ ./perfstat -e 1 -e 3 -e 5 ls -lR /usr/include/ >/dev/null
+ $ perf stat -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>
+ *
+ * Improvements and fixes by:
+ *
+ * Arjan van de Ven <arjan@linux.intel.com>
+ * Yanmin Zhang <yanmin.zhang@intel.com>
+ * Wu Fengguang <fengguang.wu@intel.com>
+ * Mike Galbraith <efault@gmx.de>
+ * Paul Mackerras <paulus@samba.org>
+ *
+ * Released under the GPL v2. (and only v2, not any later version)
*/
- /*
- * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
- *
- * Improvements and fixes by:
- *
- * Arjan van de Ven <arjan@linux.intel.com>
- * Yanmin Zhang <yanmin.zhang@intel.com>
- * Wu Fengguang <fengguang.wu@intel.com>
- * Mike Galbraith <efault@gmx.de>
- * Paul Mackerras <paulus@samba.org>
- *
- * Released under the GPL v2. (and only v2, not any later version)
- */
-
#include "perf.h"
#include "util/util.h"
+#include "util/parse-options.h"
+#include "util/parse-events.h"
-#include <getopt.h>
-#include <assert.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <errno.h>
-#include <time.h>
-#include <sched.h>
-#include <pthread.h>
-
-#include <sys/syscall.h>
-#include <sys/ioctl.h>
-#include <sys/poll.h>
#include <sys/prctl.h>
-#include <sys/wait.h>
-#include <sys/uio.h>
-#include <sys/mman.h>
-
-#include <linux/unistd.h>
-#include <linux/types.h>
-
-#define EVENT_MASK_KERNEL 1
-#define EVENT_MASK_USER 2
static int system_wide = 0;
+static int inherit = 1;
-static int nr_counters = 0;
-static __u64 event_id[MAX_COUNTERS] = {
+static __u64 default_event_id[MAX_COUNTERS] = {
EID(PERF_TYPE_SOFTWARE, PERF_COUNT_TASK_CLOCK),
EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CONTEXT_SWITCHES),
EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CPU_MIGRATIONS),
EID(PERF_TYPE_HARDWARE, PERF_COUNT_CACHE_REFERENCES),
EID(PERF_TYPE_HARDWARE, PERF_COUNT_CACHE_MISSES),
};
+
static int default_interval = 100000;
static int event_count[MAX_COUNTERS];
static int fd[MAX_NR_CPUS][MAX_COUNTERS];
-static int event_mask[MAX_COUNTERS];
-static int tid = -1;
-static int profile_cpu = -1;
+static int target_pid = -1;
static int nr_cpus = 0;
-static int nmi = 1;
-static int group = 0;
static unsigned int page_size;
-static int zero;
-
static int scale = 1;
static const unsigned int default_count[] = {
10000,
};
-static char *hw_event_names[] = {
- "CPU cycles",
- "instructions",
- "cache references",
- "cache misses",
- "branches",
- "branch misses",
- "bus cycles",
-};
-
-static char *sw_event_names[] = {
- "cpu clock ticks",
- "task clock ticks",
- "pagefaults",
- "context switches",
- "CPU migrations",
- "minor faults",
- "major faults",
-};
-
-struct event_symbol {
- __u64 event;
- char *symbol;
-};
-
-static struct event_symbol event_symbols[] = {
- {EID(PERF_TYPE_HARDWARE, PERF_COUNT_CPU_CYCLES), "cpu-cycles", },
- {EID(PERF_TYPE_HARDWARE, PERF_COUNT_CPU_CYCLES), "cycles", },
- {EID(PERF_TYPE_HARDWARE, PERF_COUNT_INSTRUCTIONS), "instructions", },
- {EID(PERF_TYPE_HARDWARE, PERF_COUNT_CACHE_REFERENCES), "cache-references", },
- {EID(PERF_TYPE_HARDWARE, PERF_COUNT_CACHE_MISSES), "cache-misses", },
- {EID(PERF_TYPE_HARDWARE, PERF_COUNT_BRANCH_INSTRUCTIONS), "branch-instructions", },
- {EID(PERF_TYPE_HARDWARE, PERF_COUNT_BRANCH_INSTRUCTIONS), "branches", },
- {EID(PERF_TYPE_HARDWARE, PERF_COUNT_BRANCH_MISSES), "branch-misses", },
- {EID(PERF_TYPE_HARDWARE, PERF_COUNT_BUS_CYCLES), "bus-cycles", },
-
- {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CPU_CLOCK), "cpu-clock", },
- {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_TASK_CLOCK), "task-clock", },
- {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_PAGE_FAULTS), "page-faults", },
- {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_PAGE_FAULTS), "faults", },
- {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_PAGE_FAULTS_MIN), "minor-faults", },
- {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_PAGE_FAULTS_MAJ), "major-faults", },
- {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CONTEXT_SWITCHES), "context-switches", },
- {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CONTEXT_SWITCHES), "cs", },
- {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CPU_MIGRATIONS), "cpu-migrations", },
- {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CPU_MIGRATIONS), "migrations", },
-};
-
-#define __PERF_COUNTER_FIELD(config, name) \
- ((config & PERF_COUNTER_##name##_MASK) >> PERF_COUNTER_##name##_SHIFT)
-
-#define PERF_COUNTER_RAW(config) __PERF_COUNTER_FIELD(config, RAW)
-#define PERF_COUNTER_CONFIG(config) __PERF_COUNTER_FIELD(config, CONFIG)
-#define PERF_COUNTER_TYPE(config) __PERF_COUNTER_FIELD(config, TYPE)
-#define PERF_COUNTER_ID(config) __PERF_COUNTER_FIELD(config, EVENT)
-
-static void display_events_help(void)
-{
- unsigned int i;
- __u64 e;
-
- printf(
- " -e EVENT --event=EVENT # symbolic-name abbreviations");
-
- for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
- int type, id;
-
- e = event_symbols[i].event;
- type = PERF_COUNTER_TYPE(e);
- id = PERF_COUNTER_ID(e);
-
- printf("\n %d:%d: %-20s",
- type, id, event_symbols[i].symbol);
- }
-
- printf("\n"
- " rNNN: raw PMU events (eventsel+umask)\n\n");
-}
-
-static void display_help(void)
-{
- printf(
- "Usage: perfstat [<events...>] <cmd...>\n\n"
- "PerfStat Options (up to %d event types can be specified):\n\n",
- MAX_COUNTERS);
-
- display_events_help();
-
- printf(
- " -l # scale counter values\n"
- " -a # system-wide collection\n");
- exit(0);
-}
-
-static char *event_name(int ctr)
-{
- __u64 config = event_id[ctr];
- int type = PERF_COUNTER_TYPE(config);
- int id = PERF_COUNTER_ID(config);
- static char buf[32];
-
- if (PERF_COUNTER_RAW(config)) {
- sprintf(buf, "raw 0x%llx", PERF_COUNTER_CONFIG(config));
- return buf;
- }
-
- switch (type) {
- case PERF_TYPE_HARDWARE:
- if (id < PERF_HW_EVENTS_MAX)
- return hw_event_names[id];
- return "unknown-hardware";
-
- case PERF_TYPE_SOFTWARE:
- if (id < PERF_SW_EVENTS_MAX)
- return sw_event_names[id];
- return "unknown-software";
-
- default:
- break;
- }
-
- return "unknown";
-}
-
-/*
- * Each event can have multiple symbolic names.
- * Symbolic names are (almost) exactly matched.
- */
-static __u64 match_event_symbols(char *str)
-{
- __u64 config, id;
- int type;
- unsigned int i;
- char mask_str[4];
-
- if (sscanf(str, "r%llx", &config) == 1)
- return config | PERF_COUNTER_RAW_MASK;
-
- switch (sscanf(str, "%d:%llu:%2s", &type, &id, mask_str)) {
- case 3:
- if (strchr(mask_str, 'k'))
- event_mask[nr_counters] |= EVENT_MASK_USER;
- if (strchr(mask_str, 'u'))
- event_mask[nr_counters] |= EVENT_MASK_KERNEL;
- case 2:
- return EID(type, id);
-
- default:
- break;
- }
-
- for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
- if (!strncmp(str, event_symbols[i].symbol,
- strlen(event_symbols[i].symbol)))
- return event_symbols[i].event;
- }
-
- return ~0ULL;
-}
-
-static int parse_events(char *str)
-{
- __u64 config;
-
-again:
- if (nr_counters == MAX_COUNTERS)
- return -1;
-
- config = match_event_symbols(str);
- if (config == ~0ULL)
- return -1;
-
- event_id[nr_counters] = config;
- nr_counters++;
-
- str = strstr(str, ",");
- if (str) {
- str++;
- goto again;
- }
-
- return 0;
-}
-
-
-/*
- * perfstat
- */
-
-char fault_here[1000000];
-
static void create_perfstat_counter(int counter)
{
struct perf_counter_hw_event hw_event;
memset(&hw_event, 0, sizeof(hw_event));
hw_event.config = event_id[counter];
hw_event.record_type = 0;
- hw_event.nmi = 0;
+ hw_event.nmi = 1;
hw_event.exclude_kernel = event_mask[counter] & EVENT_MASK_KERNEL;
hw_event.exclude_user = event_mask[counter] & EVENT_MASK_USER;
}
}
} else {
- hw_event.inherit = 1;
+ hw_event.inherit = inherit;
hw_event.disabled = 1;
fd[0][counter] = sys_perf_counter_open(&hw_event, 0, -1, -1, 0);
}
}
-int do_perfstat(int argc, char *argv[])
+int do_perfstat(int argc, const char **argv)
{
unsigned long long t0, t1;
int counter;
for (counter = 0; counter < nr_counters; counter++)
create_perfstat_counter(counter);
- argc -= optind;
- argv += optind;
-
- if (!argc)
- display_help();
-
/*
* Enable counters and exec the command:
*/
if ((pid = fork()) < 0)
perror("failed to fork");
if (!pid) {
- if (execvp(argv[0], argv)) {
+ if (execvp(argv[0], (char **)argv)) {
perror(argv[0]);
exit(-1);
}
return 0;
}
-static void process_options(int argc, char **argv)
+static void skip_signal(int signo)
{
- int error = 0, counter;
-
- for (;;) {
- int option_index = 0;
- /** Options for getopt */
- static struct option long_options[] = {
- {"count", required_argument, NULL, 'c'},
- {"cpu", required_argument, NULL, 'C'},
- {"delay", required_argument, NULL, 'd'},
- {"dump_symtab", no_argument, NULL, 'D'},
- {"event", required_argument, NULL, 'e'},
- {"filter", required_argument, NULL, 'f'},
- {"group", required_argument, NULL, 'g'},
- {"help", no_argument, NULL, 'h'},
- {"nmi", required_argument, NULL, 'n'},
- {"munmap_info", no_argument, NULL, 'U'},
- {"pid", required_argument, NULL, 'p'},
- {"realtime", required_argument, NULL, 'r'},
- {"scale", no_argument, NULL, 'l'},
- {"symbol", required_argument, NULL, 's'},
- {"stat", no_argument, NULL, 'S'},
- {"vmlinux", required_argument, NULL, 'x'},
- {"zero", no_argument, NULL, 'z'},
- {NULL, 0, NULL, 0 }
- };
- int c = getopt_long(argc, argv, "+:ac:C:d:De:f:g:hln:m:p:r:s:Sx:zMU",
- long_options, &option_index);
- if (c == -1)
- break;
-
- switch (c) {
- case 'a': system_wide = 1; break;
- case 'c': default_interval = atoi(optarg); break;
- case 'C':
- /* CPU and PID are mutually exclusive */
- if (tid != -1) {
- printf("WARNING: CPU switch overriding PID\n");
- sleep(1);
- tid = -1;
- }
- profile_cpu = atoi(optarg); break;
-
- case 'e': error = parse_events(optarg); break;
-
- case 'g': group = atoi(optarg); break;
- case 'h': display_help(); break;
- case 'l': scale = 1; break;
- case 'n': nmi = atoi(optarg); break;
- case 'p':
- /* CPU and PID are mutually exclusive */
- if (profile_cpu != -1) {
- printf("WARNING: PID switch overriding CPU\n");
- sleep(1);
- profile_cpu = -1;
- }
- tid = atoi(optarg); break;
- case 'z': zero = 1; break;
- default: error = 1; break;
- }
- }
- if (error)
- display_help();
+}
+
+static const char * const stat_usage[] = {
+ "perf stat [<options>] <command>",
+ NULL
+};
+
+static char events_help_msg[EVENTS_HELP_MAX];
+
+static const struct option options[] = {
+ OPT_CALLBACK('e', "event", NULL, "event",
+ events_help_msg, parse_events),
+ OPT_INTEGER('c', "count", &default_interval,
+ "event period to sample"),
+ OPT_BOOLEAN('i', "inherit", &inherit,
+ "child tasks inherit counters"),
+ OPT_INTEGER('p', "pid", &target_pid,
+ "stat events on existing pid"),
+ OPT_BOOLEAN('a', "all-cpus", &system_wide,
+ "system-wide collection from all CPUs"),
+ OPT_BOOLEAN('l', "scale", &scale,
+ "scale/normalize counters"),
+ OPT_END()
+};
+
+int cmd_stat(int argc, const char **argv, const char *prefix)
+{
+ int counter;
+
+ page_size = sysconf(_SC_PAGE_SIZE);
+
+ create_events_help(events_help_msg);
+ memcpy(event_id, default_event_id, sizeof(default_event_id));
+
+ argc = parse_options(argc, argv, options, stat_usage, 0);
+ if (!argc)
+ usage_with_options(stat_usage, options);
if (!nr_counters) {
nr_counters = 8;
event_count[counter] = default_interval;
}
-}
-
-static void skip_signal(int signo)
-{
-}
-
-int cmd_stat(int argc, char **argv, const char *prefix)
-{
- page_size = sysconf(_SC_PAGE_SIZE);
-
- process_options(argc, argv);
-
nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
assert(nr_cpus <= MAX_NR_CPUS);
assert(nr_cpus >= 0);
projects / ~andy / linux / commitdiff