#include <unistd.h>
#include <sched.h>
+#include <sys/mman.h>
enum write_mode_t {
WRITE_FORCE,
static int *fd[MAX_NR_CPUS][MAX_COUNTERS];
-static unsigned int user_interval = UINT_MAX;
-static long default_interval = 0;
+static u64 user_interval = ULLONG_MAX;
+static u64 default_interval = 0;
static int nr_cpus = 0;
static unsigned int page_size;
static int pipe_output = 0;
static const char *output_name = "perf.data";
static int group = 0;
-static unsigned int realtime_prio = 0;
+static int realtime_prio = 0;
static bool raw_samples = false;
static bool system_wide = false;
static int profile_cpu = -1;
static pid_t *all_tids = NULL;
static int thread_num = 0;
static pid_t child_pid = -1;
-static bool inherit = true;
+static bool no_inherit = false;
static enum write_mode_t write_mode = WRITE_FORCE;
static bool call_graph = false;
static bool inherit_stat = false;
static bool no_samples = false;
static bool sample_address = false;
-static bool multiplex = false;
-static int multiplex_fd = -1;
static long samples = 0;
-static struct timeval last_read;
-static struct timeval this_read;
-
static u64 bytes_written = 0;
static struct pollfd *event_array;
unsigned int prev;
};
-static struct mmap_data *mmap_array[MAX_NR_CPUS][MAX_COUNTERS];
+static struct mmap_data mmap_array[MAX_NR_CPUS];
static unsigned long mmap_read_head(struct mmap_data *md)
{
void *buf;
int diff;
- gettimeofday(&this_read, NULL);
-
/*
* If we're further behind than half the buffer, there's a chance
* the writer will bite our tail and mess up the samples under us.
*/
diff = head - old;
if (diff < 0) {
- struct timeval iv;
- unsigned long msecs;
-
- timersub(&this_read, &last_read, &iv);
- msecs = iv.tv_sec*1000 + iv.tv_usec/1000;
-
- fprintf(stderr, "WARNING: failed to keep up with mmap data."
- " Last read %lu msecs ago.\n", msecs);
-
+ fprintf(stderr, "WARNING: failed to keep up with mmap data\n");
/*
* head points to a known good entry, start there.
*/
old = head;
}
- last_read = this_read;
-
if (old != head)
samples++;
* it a weak assumption overridable by the user.
*/
if (!attr->sample_period || (user_freq != UINT_MAX &&
- user_interval != UINT_MAX)) {
+ user_interval != ULLONG_MAX)) {
if (freq) {
attr->sample_type |= PERF_SAMPLE_PERIOD;
attr->freq = 1;
attr->mmap = track;
attr->comm = track;
- attr->inherit = inherit;
- if (target_pid == -1 && !system_wide) {
+ attr->inherit = !no_inherit;
+ if (target_pid == -1 && target_tid == -1 && !system_wide) {
attr->disabled = 1;
attr->enable_on_exec = 1;
}
*/
if (group && group_fd == -1)
group_fd = fd[nr_cpu][counter][thread_index];
- if (multiplex && multiplex_fd == -1)
- multiplex_fd = fd[nr_cpu][counter][thread_index];
- if (multiplex && fd[nr_cpu][counter][thread_index] != multiplex_fd) {
-
- ret = ioctl(fd[nr_cpu][counter][thread_index], PERF_EVENT_IOC_SET_OUTPUT, multiplex_fd);
- assert(ret != -1);
+ if (counter || thread_index) {
+ ret = ioctl(fd[nr_cpu][counter][thread_index],
+ PERF_EVENT_IOC_SET_OUTPUT,
+ fd[nr_cpu][0][0]);
+ if (ret) {
+ error("failed to set output: %d (%s)\n", errno,
+ strerror(errno));
+ exit(-1);
+ }
} else {
- event_array[nr_poll].fd = fd[nr_cpu][counter][thread_index];
- event_array[nr_poll].events = POLLIN;
- nr_poll++;
-
- mmap_array[nr_cpu][counter][thread_index].counter = counter;
- mmap_array[nr_cpu][counter][thread_index].prev = 0;
- mmap_array[nr_cpu][counter][thread_index].mask = mmap_pages*page_size - 1;
- mmap_array[nr_cpu][counter][thread_index].base = mmap(NULL, (mmap_pages+1)*page_size,
+ mmap_array[nr_cpu].counter = counter;
+ mmap_array[nr_cpu].prev = 0;
+ mmap_array[nr_cpu].mask = mmap_pages*page_size - 1;
+ mmap_array[nr_cpu].base = mmap(NULL, (mmap_pages+1)*page_size,
PROT_READ|PROT_WRITE, MAP_SHARED, fd[nr_cpu][counter][thread_index], 0);
- if (mmap_array[nr_cpu][counter][thread_index].base == MAP_FAILED) {
+ if (mmap_array[nr_cpu].base == MAP_FAILED) {
error("failed to mmap with %d (%s)\n", errno, strerror(errno));
exit(-1);
}
+
+ event_array[nr_poll].fd = fd[nr_cpu][counter][thread_index];
+ event_array[nr_poll].events = POLLIN;
+ nr_poll++;
}
if (filter != NULL) {
process_buildids();
perf_header__write(&session->header, output, true);
- } else {
- int err;
-
- err = event__synthesize_build_ids(process_synthesized_event,
- session);
- if (err < 0)
- pr_err("Couldn't synthesize build ids.\n");
}
}
" relocation symbol.\n", machine->pid);
}
+static struct perf_event_header finished_round_event = {
+ .size = sizeof(struct perf_event_header),
+ .type = PERF_RECORD_FINISHED_ROUND,
+};
+
+static void mmap_read_all(void)
+{
+ int i;
+
+ for (i = 0; i < nr_cpu; i++) {
+ if (mmap_array[i].base)
+ mmap_read(&mmap_array[i]);
+ }
+
+ if (perf_header__has_feat(&session->header, HEADER_TRACE_INFO))
+ write_output(&finished_round_event, sizeof(finished_round_event));
+}
+
static int __cmd_record(int argc, const char **argv)
{
int i, counter;
struct stat st;
- pid_t pid = 0;
int flags;
int err;
unsigned long waking = 0;
}
session = perf_session__new(output_name, O_WRONLY,
- write_mode == WRITE_FORCE);
+ write_mode == WRITE_FORCE, false);
if (session == NULL) {
pr_err("Not enough memory for reading perf file header\n");
return -1;
return err;
}
- if (raw_samples) {
+ if (have_tracepoints(attrs, nr_counters))
perf_header__set_feat(&session->header, HEADER_TRACE_INFO);
- } else {
- for (i = 0; i < nr_counters; i++) {
- if (attrs[i].sample_type & PERF_SAMPLE_RAW) {
- perf_header__set_feat(&session->header, HEADER_TRACE_INFO);
- break;
- }
- }
- }
atexit(atexit_header);
if (forks) {
child_pid = fork();
- if (pid < 0) {
+ if (child_pid < 0) {
perror("failed to fork");
exit(-1);
}
close(child_ready_pipe[0]);
}
- if ((!system_wide && !inherit) || profile_cpu != -1) {
+ if ((!system_wide && no_inherit) || profile_cpu != -1) {
open_counters(profile_cpu);
} else {
nr_cpus = read_cpu_map();
return err;
}
- err = event__synthesize_tracing_data(output, attrs,
- nr_counters,
- process_synthesized_event,
- session);
- if (err <= 0) {
- pr_err("Couldn't record tracing data.\n");
- return err;
+ if (have_tracepoints(attrs, nr_counters)) {
+ /*
+ * FIXME err <= 0 here actually means that
+ * there were no tracepoints so its not really
+ * an error, just that we don't need to
+ * synthesize anything. We really have to
+ * return this more properly and also
+ * propagate errors that now are calling die()
+ */
+ err = event__synthesize_tracing_data(output, attrs,
+ nr_counters,
+ process_synthesized_event,
+ session);
+ if (err <= 0) {
+ pr_err("Couldn't record tracing data.\n");
+ return err;
+ }
+ advance_output(err);
}
-
- advance_output(err);
}
machine = perf_session__find_host_machine(session);
int hits = samples;
int thread;
- for (i = 0; i < nr_cpu; i++) {
- for (counter = 0; counter < nr_counters; counter++) {
- for (thread = 0;
- thread < thread_num; thread++) {
- if (mmap_array[i][counter][thread].base)
- mmap_read(&mmap_array[i][counter][thread]);
- }
-
- }
- }
+ mmap_read_all();
if (hits == samples) {
if (done)
"CPU to profile on"),
OPT_BOOLEAN('f', "force", &force,
"overwrite existing data file (deprecated)"),
- OPT_LONG('c', "count", &user_interval,
- "event period to sample"),
+ OPT_U64('c', "count", &user_interval, "event period to sample"),
OPT_STRING('o', "output", &output_name, "file",
"output file name"),
- OPT_BOOLEAN('i', "inherit", &inherit,
- "child tasks inherit counters"),
- OPT_INTEGER('F', "freq", &user_freq,
- "profile at this frequency"),
- OPT_INTEGER('m', "mmap-pages", &mmap_pages,
- "number of mmap data pages"),
+ OPT_BOOLEAN('i', "no-inherit", &no_inherit,
+ "child tasks do not inherit counters"),
+ OPT_UINTEGER('F', "freq", &user_freq, "profile at this frequency"),
+ OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"),
OPT_BOOLEAN('g', "call-graph", &call_graph,
"do call-graph (stack chain/backtrace) recording"),
OPT_INCR('v', "verbose", &verbose,
"Sample addresses"),
OPT_BOOLEAN('n', "no-samples", &no_samples,
"don't sample"),
- OPT_BOOLEAN('M', "multiplex", &multiplex,
- "multiplex counter output in a single channel"),
OPT_END()
};
for (i = 0; i < MAX_NR_CPUS; i++) {
for (j = 0; j < MAX_COUNTERS; j++) {
fd[i][j] = malloc(sizeof(int)*thread_num);
- mmap_array[i][j] = zalloc(
- sizeof(struct mmap_data)*thread_num);
- if (!fd[i][j] || !mmap_array[i][j])
+ if (!fd[i][j])
return -ENOMEM;
}
}
if (!event_array)
return -ENOMEM;
- if (user_interval != UINT_MAX)
+ if (user_interval != ULLONG_MAX)
default_interval = user_interval;
if (user_freq != UINT_MAX)
freq = user_freq;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff