perf_counter: tools: update the tools to support process and inherited counters
"perf record":
- per task counter
- inherit switch
- nmi switch
"perf report":
- userspace/kernel filter
"perf stat":
- userspace/kernel filter
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <20090505155437.389163017@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/Documentation/perf_counter/builtin-record.c b/Documentation/perf_counter/builtin-record.c
index ddfdcf8..5f5e6df 100644
--- a/Documentation/perf_counter/builtin-record.c
+++ b/Documentation/perf_counter/builtin-record.c
@@ -45,7 +45,10 @@
static int output;
static char *output_name = "output.perf";
static int group = 0;
-static unsigned int realtime_prio = 0;
+static unsigned int realtime_prio = 0;
+static int system_wide = 0;
+static int inherit = 1;
+static int nmi = 1;
const unsigned int default_count[] = {
1000000,
@@ -167,7 +170,7 @@
static void display_help(void)
{
printf(
- "Usage: perf-record [<options>]\n"
+ "Usage: perf-record [<options>] <cmd>\n"
"perf-record Options (up to %d event types can be specified at once):\n\n",
MAX_COUNTERS);
@@ -178,12 +181,13 @@
" -m pages --mmap_pages=<pages> # number of mmap data pages\n"
" -o file --output=<file> # output file\n"
" -r prio --realtime=<prio> # use RT prio\n"
+ " -s --system # system wide profiling\n"
);
exit(0);
}
-static void process_options(int argc, char *argv[])
+static void process_options(int argc, const char *argv[])
{
int error = 0, counter;
@@ -196,9 +200,12 @@
{"mmap_pages", required_argument, NULL, 'm'},
{"output", required_argument, NULL, 'o'},
{"realtime", required_argument, NULL, 'r'},
+ {"system", no_argument, NULL, 's'},
+ {"inherit", no_argument, NULL, 'i'},
+ {"nmi", no_argument, NULL, 'n'},
{NULL, 0, NULL, 0 }
};
- int c = getopt_long(argc, argv, "+:c:e:m:o:r:",
+ int c = getopt_long(argc, argv, "+:c:e:m:o:r:sin",
long_options, &option_index);
if (c == -1)
break;
@@ -209,9 +216,16 @@
case 'm': mmap_pages = atoi(optarg); break;
case 'o': output_name = strdup(optarg); break;
case 'r': realtime_prio = atoi(optarg); break;
+ case 's': system_wide ^= 1; break;
+ case 'i': inherit ^= 1; break;
+ case 'n': nmi ^= 1; break;
default: error = 1; break;
}
}
+
+ if (argc - optind == 0)
+ error = 1;
+
if (error)
display_help();
@@ -325,18 +339,82 @@
static volatile int done = 0;
-static void sigchld_handler(int sig)
+static void sig_handler(int sig)
{
- if (sig == SIGCHLD)
- done = 1;
+ done = 1;
}
-int cmd_record(int argc, char **argv)
+static struct pollfd event_array[MAX_NR_CPUS * MAX_COUNTERS];
+static struct mmap_data mmap_array[MAX_NR_CPUS][MAX_COUNTERS];
+
+static int nr_poll;
+static int nr_cpu;
+
+static void open_counters(int cpu)
{
- struct pollfd event_array[MAX_NR_CPUS * MAX_COUNTERS];
- struct mmap_data mmap_array[MAX_NR_CPUS][MAX_COUNTERS];
struct perf_counter_hw_event hw_event;
- int i, counter, group_fd, nr_poll = 0;
+ int counter, group_fd;
+ int track = 1;
+ pid_t pid = -1;
+
+ if (cpu < 0)
+ pid = 0;
+
+ group_fd = -1;
+ for (counter = 0; counter < nr_counters; counter++) {
+
+ memset(&hw_event, 0, sizeof(hw_event));
+ hw_event.config = event_id[counter];
+ hw_event.irq_period = event_count[counter];
+ hw_event.record_type = PERF_RECORD_IP | PERF_RECORD_TID;
+ hw_event.nmi = nmi;
+ hw_event.mmap = track;
+ hw_event.comm = track;
+ hw_event.inherit = (cpu < 0) && inherit;
+
+ track = 0; // only the first counter needs these
+
+ fd[nr_cpu][counter] =
+ sys_perf_counter_open(&hw_event, pid, cpu, group_fd, 0);
+
+ if (fd[nr_cpu][counter] < 0) {
+ int err = errno;
+ printf("kerneltop error: syscall returned with %d (%s)\n",
+ fd[nr_cpu][counter], strerror(err));
+ if (err == EPERM)
+ printf("Are you root?\n");
+ exit(-1);
+ }
+ assert(fd[nr_cpu][counter] >= 0);
+ fcntl(fd[nr_cpu][counter], F_SETFL, O_NONBLOCK);
+
+ /*
+ * First counter acts as the group leader:
+ */
+ if (group && group_fd == -1)
+ group_fd = fd[nr_cpu][counter];
+
+ event_array[nr_poll].fd = fd[nr_cpu][counter];
+ event_array[nr_poll].events = POLLIN;
+ nr_poll++;
+
+ mmap_array[nr_cpu][counter].counter = counter;
+ mmap_array[nr_cpu][counter].prev = 0;
+ mmap_array[nr_cpu][counter].mask = mmap_pages*page_size - 1;
+ mmap_array[nr_cpu][counter].base = mmap(NULL, (mmap_pages+1)*page_size,
+ PROT_READ, MAP_SHARED, fd[nr_cpu][counter], 0);
+ if (mmap_array[nr_cpu][counter].base == MAP_FAILED) {
+ printf("kerneltop error: failed to mmap with %d (%s)\n",
+ errno, strerror(errno));
+ exit(-1);
+ }
+ }
+ nr_cpu++;
+}
+
+int cmd_record(int argc, const char **argv)
+{
+ int i, counter;
pid_t pid;
int ret;
@@ -357,54 +435,13 @@
argc -= optind;
argv += optind;
- for (i = 0; i < nr_cpus; i++) {
- group_fd = -1;
- for (counter = 0; counter < nr_counters; counter++) {
+ if (!system_wide)
+ open_counters(-1);
+ else for (i = 0; i < nr_cpus; i++)
+ open_counters(i);
- memset(&hw_event, 0, sizeof(hw_event));
- hw_event.config = event_id[counter];
- hw_event.irq_period = event_count[counter];
- hw_event.record_type = PERF_RECORD_IP | PERF_RECORD_TID;
- hw_event.nmi = 1;
- hw_event.mmap = 1;
- hw_event.comm = 1;
-
- fd[i][counter] = sys_perf_counter_open(&hw_event, -1, i, group_fd, 0);
- if (fd[i][counter] < 0) {
- int err = errno;
- printf("kerneltop error: syscall returned with %d (%s)\n",
- fd[i][counter], strerror(err));
- if (err == EPERM)
- printf("Are you root?\n");
- exit(-1);
- }
- assert(fd[i][counter] >= 0);
- fcntl(fd[i][counter], F_SETFL, O_NONBLOCK);
-
- /*
- * First counter acts as the group leader:
- */
- if (group && group_fd == -1)
- group_fd = fd[i][counter];
-
- event_array[nr_poll].fd = fd[i][counter];
- event_array[nr_poll].events = POLLIN;
- nr_poll++;
-
- mmap_array[i][counter].counter = counter;
- mmap_array[i][counter].prev = 0;
- mmap_array[i][counter].mask = mmap_pages*page_size - 1;
- mmap_array[i][counter].base = mmap(NULL, (mmap_pages+1)*page_size,
- PROT_READ, MAP_SHARED, fd[i][counter], 0);
- if (mmap_array[i][counter].base == MAP_FAILED) {
- printf("kerneltop error: failed to mmap with %d (%s)\n",
- errno, strerror(errno));
- exit(-1);
- }
- }
- }
-
- signal(SIGCHLD, sigchld_handler);
+ signal(SIGCHLD, sig_handler);
+ signal(SIGINT, sig_handler);
pid = fork();
if (pid < 0)
@@ -434,7 +471,7 @@
while (!done) {
int hits = events;
- for (i = 0; i < nr_cpus; i++) {
+ for (i = 0; i < nr_cpu; i++) {
for (counter = 0; counter < nr_counters; counter++)
mmap_read(&mmap_array[i][counter]);
}