Commit-ID: f7524bda8be8be98db356d6a83ac1da451ecdb2e
Gitweb: http://git.kernel.org/tip/f7524bda8be8be98db356d6a83ac1da451ecdb2e
Author: Wu Fengguang <fengguang.wu@xxxxxxxxx>
AuthorDate: Fri, 20 Mar 2009 10:08:06 +0800
Committer: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Mon, 6 Apr 2009 09:30:22 +0200
perf_counter tools: move remaining code into kerneltop.c
- perfstat.c can be safely removed now
- perfstat: -s => -a for system wide accounting
- kerneltop: add -S/--stat for perfstat mode
- minor adjustments to kerneltop --help, perfstat --help
Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx>
Acked-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
Documentation/perf_counter/kerneltop.c | 530 +++++++++++++++++++++++------
Documentation/perf_counter/perfcounters.h | 132 +-------
2 files changed, 432 insertions(+), 230 deletions(-)
diff --git a/Documentation/perf_counter/kerneltop.c b/Documentation/perf_counter/kerneltop.c
index cba5cb0..9db65a4 100644
--- a/Documentation/perf_counter/kerneltop.c
+++ b/Documentation/perf_counter/kerneltop.c
@@ -3,7 +3,7 @@
Build with:
- cc -O6 -Wall `pkg-config --cflags --libs glib-2.0` -o kerneltop kerneltop.c
+ cc -O6 -Wall -lrt `pkg-config --cflags --libs glib-2.0` -o kerneltop kerneltop.c
Sample output:
@@ -26,18 +26,40 @@
12.00 - ffffffff804ffb7f : __ip_local_out
11.97 - ffffffff804fc0c8 : ip_local_deliver_finish
8.54 - ffffffff805001a3 : ip_queue_xmit
+ */
- Started by Ingo Molnar <mingo@xxxxxxxxxx>
+/*
+ * perfstat: /usr/bin/time -alike performance counter statistics utility
- Improvements and fixes by:
+ 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.
- Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>
- Yanmin Zhang <yanmin.zhang@xxxxxxxxx>
- Mike Galbraith <efault@xxxxxx>
+ Sample output:
- Released under the GPL v2. (and only v2, not any later version)
+ $ ./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@xxxxxxxxxx>
+ *
+ * Improvements and fixes by:
+ *
+ * Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>
+ * Yanmin Zhang <yanmin.zhang@xxxxxxxxx>
+ * Wu Fengguang <fengguang.wu@xxxxxxxxx>
+ * Mike Galbraith <efault@xxxxxx>
+ *
+ * Released under the GPL v2. (and only v2, not any later version)
+ */
+
#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/stat.h>
@@ -67,18 +89,22 @@
#include "perfcounters.h"
-const unsigned int default_count[] = {
- 1000000,
- 1000000,
- 10000,
- 10000,
- 1000000,
- 10000,
-};
-static __u64 count_filter = 100;
+#define MAX_COUNTERS 64
+#define MAX_NR_CPUS 256
+
+#define DEF_PERFSTAT_EVENTS { -2, -5, -4, -3, 0, 1, 2, 3}
+
+static int run_perfstat = 0;
+static int system_wide = 0;
+static int nr_counters = 0;
+static long event_id[MAX_COUNTERS] = DEF_PERFSTAT_EVENTS;
+static int event_raw[MAX_COUNTERS];
static int event_count[MAX_COUNTERS];
+static int fd[MAX_NR_CPUS][MAX_COUNTERS];
+
+static __u64 count_filter = 100;
static int tid = -1;
static int profile_cpu = -1;
@@ -96,125 +122,335 @@ static int delay_secs = 2;
static int zero;
static int dump_symtab;
+static GList *lines;
+
struct source_line {
uint64_t EIP;
unsigned long count;
char *line;
};
-static GList *lines;
+
+const unsigned int default_count[] = {
+ 1000000,
+ 1000000,
+ 10000,
+ 10000,
+ 1000000,
+ 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",
+};
+
+struct event_symbol {
+ int event;
+ char *symbol;
+};
+
+static struct event_symbol event_symbols[] = {
+ {PERF_COUNT_CPU_CYCLES, "cpu-cycles", },
+ {PERF_COUNT_CPU_CYCLES, "cycles", },
+ {PERF_COUNT_INSTRUCTIONS, "instructions", },
+ {PERF_COUNT_CACHE_REFERENCES, "cache-references", },
+ {PERF_COUNT_CACHE_MISSES, "cache-misses", },
+ {PERF_COUNT_BRANCH_INSTRUCTIONS, "branch-instructions", },
+ {PERF_COUNT_BRANCH_INSTRUCTIONS, "branches", },
+ {PERF_COUNT_BRANCH_MISSES, "branch-misses", },
+ {PERF_COUNT_BUS_CYCLES, "bus-cycles", },
+ {PERF_COUNT_CPU_CLOCK, "cpu-ticks", },
+ {PERF_COUNT_CPU_CLOCK, "ticks", },
+ {PERF_COUNT_TASK_CLOCK, "task-ticks", },
+ {PERF_COUNT_PAGE_FAULTS, "page-faults", },
+ {PERF_COUNT_PAGE_FAULTS, "faults", },
+ {PERF_COUNT_CONTEXT_SWITCHES, "context-switches", },
+ {PERF_COUNT_CONTEXT_SWITCHES, "cs", },
+ {PERF_COUNT_CPU_MIGRATIONS, "cpu-migrations", },
+ {PERF_COUNT_CPU_MIGRATIONS, "migrations", },
+};
+
+static void display_events_help(void)
+{
+ unsigned int i;
+ int e;
+
+ 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 PMU events (eventsel+umask)\n\n");
+}
+
+static void display_perfstat_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(
+ " -a # system-wide collection\n");
+ exit(0);
+}
static void display_help(void)
{
+ if (run_perfstat)
+ return display_perfstat_help();
+
printf(
- "Usage: kerneltop [<options>]\n\n"
+ "Usage: kerneltop [<options>]\n"
+ " Or: kerneltop -S [<options>] COMMAND [ARGS]\n\n"
"KernelTop Options (up to %d event types can be specified at once):\n\n",
MAX_COUNTERS);
+
+ display_events_help();
+
printf(
- " -e EID --event=EID # event type ID [default: 0]\n"
- " 0: CPU cycles\n"
- " 1: instructions\n"
- " 2: cache accesses\n"
- " 3: cache misses\n"
- " 4: branch instructions\n"
- " 5: branch prediction misses\n"
- " 6: bus cycles\n\n"
- " rNNN: raw PMU events (eventsel+umask)\n\n"
+ " -S --stat # perfstat COMMAND\n"
+ " -a # system-wide collection (for perfstat)\n\n"
" -c CNT --count=CNT # event period to sample\n\n"
" -C CPU --cpu=CPU # CPU (-1 for all) [default: -1]\n"
" -p PID --pid=PID # PID of sampled task (-1 for all) [default: -1]\n\n"
" -d delay --delay=<seconds> # sampling/display delay [default: 2]\n"
- " -f CNT --filter=CNT # min-event-count filter [default: 100]\n\n"
+ " -f CNT --filter=CNT # min-event-count filter [default: 100]\n\n"
" -s symbol --symbol=<symbol> # function to be showed annotated one-shot\n"
- " -x path --vmlinux=<path> # the vmlinux binary, required for -s use:\n"
+ " -x path --vmlinux=<path> # the vmlinux binary, required for -s use\n"
" -z --zero # zero counts after display\n"
" -D --dump_symtab # dump symbol table to stderr on startup\n"
- "\n");
+ );
exit(0);
}
-static void process_options(int argc, char *argv[])
+static int type_valid(int type)
{
- int error = 0, counter;
+ if (type >= PERF_HW_EVENTS_MAX)
+ return 0;
+ if (type <= PERF_SW_EVENTS_MIN)
+ return 0;
- 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'},
- {"pid", required_argument, NULL, 'p'},
- {"vmlinux", required_argument, NULL, 'x'},
- {"symbol", required_argument, NULL, 's'},
- {"zero", no_argument, NULL, 'z'},
- {NULL, 0, NULL, 0 }
- };
- int c = getopt_long(argc, argv, "c:C:d:De:f:g:hn:p:s:x:z",
- long_options, &option_index);
- if (c == -1)
- break;
+ return 1;
+}
- switch (c) {
- case 'c':
- event_count[nr_counters] = 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 'd': delay_secs = atoi(optarg); break;
- case 'D': dump_symtab = 1; break;
+static char *event_name(int ctr)
+{
+ int type = event_id[ctr];
+ static char buf[32];
- case 'e': error = parse_events(optarg); break;
+ if (event_raw[ctr]) {
+ sprintf(buf, "raw 0x%x", type);
+ return buf;
+ }
+ if (!type_valid(type))
+ return "unknown";
- case 'f': count_filter = atoi(optarg); break;
- case 'g': group = atoi(optarg); break;
- case 'h': display_help(); 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;
+ if (type >= 0)
+ return hw_event_names[type];
+
+ return sw_event_names[-type-1];
+}
+
+/*
+ * Each event can have multiple symbolic names.
+ * Symbolic names are (almost) exactly matched.
+ */
+static int match_event_symbols(char *str)
+{
+ unsigned int i;
+
+ if (isdigit(str[0]) || str[0] == '-')
+ return atoi(str);
+
+ 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 PERF_HW_EVENTS_MAX;
+}
+
+static int parse_events(char *str)
+{
+ int type, raw;
+
+again:
+ if (nr_counters == MAX_COUNTERS)
+ return -1;
+
+ raw = 0;
+ if (*str == 'r') {
+ raw = 1;
+ ++str;
+ type = strtol(str, NULL, 16);
+ } else {
+ type = match_event_symbols(str);
+ if (!type_valid(type))
+ return -1;
+ }
+
+ event_id[nr_counters] = type;
+ event_raw[nr_counters] = raw;
+ 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.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);
}
- tid = atoi(optarg); break;
- case 's': sym_filter = strdup(optarg); break;
- case 'x': vmlinux = strdup(optarg); break;
- case 'z': zero = 1; break;
- default: error = 1; break;
+ }
+ } 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);
}
}
- if (error)
- display_help();
+}
- if (!nr_counters) {
- nr_counters = 1;
- event_id[0] = 0;
+int do_perfstat(int argc, char *argv[])
+{
+ unsigned long long t0, t1;
+ int counter;
+ ssize_t res;
+ int status;
+ int pid;
+
+ if (!system_wide)
+ nr_cpus = 1;
+
+ for (counter = 0; counter < nr_counters; counter++)
+ create_perfstat_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++) {
- if (event_count[counter])
- continue;
+ 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_id[counter] < PERF_HW_EVENTS_MAX)
- event_count[counter] = default_count[event_id[counter]];
- else
- event_count[counter] = 100000;
+ 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;
}
+/*
+ * Symbols
+ */
+
static uint64_t min_ip;
static uint64_t max_ip = -1ll;
@@ -507,6 +743,9 @@ static void parse_symbols(void)
}
}
+/*
+ * Source lines
+ */
static void parse_vmlinux(char *filename)
{
@@ -527,7 +766,7 @@ static void parse_vmlinux(char *filename)
char *c;
src = malloc(sizeof(struct source_line));
- assert(src != NULL);
+ assert(src != NULL);
memset(src, 0, sizeof(struct source_line));
if (getline(&src->line, &dummy, file) < 0)
@@ -706,11 +945,100 @@ static void process_event(uint64_t ip, int counter)
record_ip(ip, counter);
}
+static void process_options(int argc, char *argv[])
+{
+ int error = 0, counter;
+
+ if (strstr(argv[0], "perfstat"))
+ run_perfstat = 1;
+
+ 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'},
+ {"pid", required_argument, NULL, 'p'},
+ {"vmlinux", required_argument, NULL, 'x'},
+ {"symbol", required_argument, NULL, 's'},
+ {"stat", no_argument, NULL, 'S'},
+ {"zero", no_argument, NULL, 'z'},
+ {NULL, 0, NULL, 0 }
+ };
+ int c = getopt_long(argc, argv, "+:ac:C:d:De:f:g:hn:p:s:Sx:z",
+ long_options, &option_index);
+ if (c == -1)
+ break;
+
+ switch (c) {
+ case 'a': system_wide = 1; break;
+ case 'c': event_count[nr_counters] = 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 'd': delay_secs = atoi(optarg); break;
+ case 'D': dump_symtab = 1; break;
+
+ case 'e': error = parse_events(optarg); break;
+
+ case 'f': count_filter = atoi(optarg); break;
+ case 'g': group = atoi(optarg); break;
+ case 'h': display_help(); 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 's': sym_filter = strdup(optarg); break;
+ case 'S': run_perfstat = 1; break;
+ case 'x': vmlinux = strdup(optarg); break;
+ case 'z': zero = 1; break;
+ default: error = 1; break;
+ }
+ }
+ if (error)
+ display_help();
+
+ if (!nr_counters) {
+ if (run_perfstat)
+ nr_counters = 8;
+ else {
+ nr_counters = 1;
+ event_id[0] = 0;
+ }
+ }
+
+ for (counter = 0; counter < nr_counters; counter++) {
+ if (event_count[counter])
+ continue;
+
+ if (event_id[counter] < PERF_HW_EVENTS_MAX)
+ event_count[counter] = default_count[event_id[counter]];
+ else
+ event_count[counter] = 100000;
+ }
+}
+
int main(int argc, char *argv[])
{
struct pollfd event_array[MAX_NR_CPUS][MAX_COUNTERS];
struct perf_counter_hw_event hw_event;
- int fd[MAX_NR_CPUS][MAX_COUNTERS];
int i, counter, group_fd;
unsigned int cpu;
uint64_t ip;
@@ -720,11 +1048,15 @@ int main(int argc, char *argv[])
process_options(argc, argv);
nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
+ assert(nr_cpus <= MAX_NR_CPUS);
+ assert(nr_cpus >= 0);
+
+ if (run_perfstat)
+ return do_perfstat(argc, argv);
+
if (tid != -1 || profile_cpu != -1)
nr_cpus = 1;
- assert(nr_cpus <= MAX_NR_CPUS);
-
for (i = 0; i < nr_cpus; i++) {
group_fd = -1;
for (counter = 0; counter < nr_counters; counter++) {
diff --git a/Documentation/perf_counter/perfcounters.h b/Documentation/perf_counter/perfcounters.h
index 99a90d8..32e24b9 100644
--- a/Documentation/perf_counter/perfcounters.h
+++ b/Documentation/perf_counter/perfcounters.h
@@ -11,9 +11,6 @@
#define PR_TASK_PERF_COUNTERS_DISABLE 31
#define PR_TASK_PERF_COUNTERS_ENABLE 32
-#define MAX_COUNTERS 64
-#define MAX_NR_CPUS 256
-
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
#define rdclock() \
@@ -110,6 +107,7 @@ struct perf_counter_hw_event {
__u64 __reserved_3;
};
+
#ifdef __x86_64__
# define __NR_perf_counter_open 295
#endif
@@ -142,131 +140,3 @@ asmlinkage int sys_perf_counter_open(
#endif
return ret;
}
-
-static int nr_counters = 0;
-static long event_id[MAX_COUNTERS] = { -2, -5, -4, -3, 0, 1, 2, 3};
-static int event_raw[MAX_COUNTERS];
-
-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",
-};
-
-struct event_symbol {
- int event;
- char *symbol;
-};
-
-static struct event_symbol event_symbols [] = {
- {PERF_COUNT_CPU_CYCLES, "cpu-cycles", },
- {PERF_COUNT_CPU_CYCLES, "cycles", },
- {PERF_COUNT_INSTRUCTIONS, "instructions", },
- {PERF_COUNT_CACHE_REFERENCES, "cache-references", },
- {PERF_COUNT_CACHE_MISSES, "cache-misses", },
- {PERF_COUNT_BRANCH_INSTRUCTIONS, "branch-instructions", },
- {PERF_COUNT_BRANCH_INSTRUCTIONS, "branches", },
- {PERF_COUNT_BRANCH_MISSES, "branch-misses", },
- {PERF_COUNT_BUS_CYCLES, "bus-cycles", },
- {PERF_COUNT_CPU_CLOCK, "cpu-ticks", },
- {PERF_COUNT_CPU_CLOCK, "ticks", },
- {PERF_COUNT_TASK_CLOCK, "task-ticks", },
- {PERF_COUNT_PAGE_FAULTS, "page-faults", },
- {PERF_COUNT_PAGE_FAULTS, "faults", },
- {PERF_COUNT_CONTEXT_SWITCHES, "context-switches", },
- {PERF_COUNT_CONTEXT_SWITCHES, "cs", },
- {PERF_COUNT_CPU_MIGRATIONS, "cpu-migrations", },
- {PERF_COUNT_CPU_MIGRATIONS, "migrations", },
-};
-
-static int type_valid(int type)
-{
- if (type >= PERF_HW_EVENTS_MAX)
- return 0;
- if (type <= PERF_SW_EVENTS_MIN)
- return 0;
-
- return 1;
-}
-
-static char *event_name(int ctr)
-{
- int type = event_id[ctr];
- static char buf[32];
-
- if (event_raw[ctr]) {
- sprintf(buf, "raw 0x%x", type);
- return buf;
- }
- if (!type_valid(type))
- return "unknown";
-
- if (type >= 0)
- return hw_event_names[type];
-
- return sw_event_names[-type-1];
-}
-
-/*
- * Each event can have multiple symbolic names.
- * Symbolic names are (almost) exactly matched.
- */
-static int match_event_symbols(char *str)
-{
- unsigned int i;
-
- if (isdigit(str[0]) || str[0] == '-')
- return atoi(str);
-
- 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 PERF_HW_EVENTS_MAX;
-}
-
-static int parse_events(char *str)
-{
- int type, raw;
-
-again:
- if (nr_counters == MAX_COUNTERS)
- return -1;
-
- raw = 0;
- if (*str == 'r') {
- raw = 1;
- ++str;
- type = strtol(str, NULL, 16);
- } else {
- type = match_event_symbols(str);
- if (!type_valid(type))
- return -1;
- }
-
- event_id[nr_counters] = type;
- event_raw[nr_counters] = raw;
- nr_counters++;
-
- str = strstr(str, ",");
- if (str) {
- str++;
- goto again;
- }
-
- return 0;
-}
--
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