#include "util/header.h"
#include "util/event.h"
+#include "util/evlist.h"
#include "util/evsel.h"
#include "util/debug.h"
#include "util/session.h"
#include "util/symbol.h"
#include "util/cpumap.h"
+#include "util/thread_map.h"
#include <unistd.h>
#include <sched.h>
static u64 user_interval = ULLONG_MAX;
static u64 default_interval = 0;
-static u64 sample_type;
-static struct cpu_map *cpus;
static unsigned int page_size;
static unsigned int mmap_pages = 128;
static unsigned int user_freq = UINT_MAX;
static int freq = 1000;
static int output;
static int pipe_output = 0;
-static const char *output_name = "perf.data";
+static const char *output_name = NULL;
static int group = 0;
static int realtime_prio = 0;
static bool nodelay = false;
static bool system_wide = false;
static pid_t target_pid = -1;
static pid_t target_tid = -1;
-static struct thread_map *threads;
static pid_t child_pid = -1;
static bool no_inherit = false;
static enum write_mode_t write_mode = WRITE_FORCE;
static bool sample_time = false;
static bool no_buildid = false;
static bool no_buildid_cache = false;
+static struct perf_evlist *evsel_list;
static long samples = 0;
static u64 bytes_written = 0;
-static struct pollfd *event_array;
-
-static int nr_poll = 0;
-static int nr_cpu = 0;
-
static int file_new = 1;
static off_t post_processing_offset;
static struct perf_session *session;
static const char *cpu_list;
-struct mmap_data {
- void *base;
- unsigned int mask;
- unsigned int prev;
-};
-
-static struct mmap_data mmap_array[MAX_NR_CPUS];
-
-static unsigned long mmap_read_head(struct mmap_data *md)
-{
- struct perf_event_mmap_page *pc = md->base;
- long head;
-
- head = pc->data_head;
- rmb();
-
- return head;
-}
-
-static void mmap_write_tail(struct mmap_data *md, unsigned long tail)
-{
- struct perf_event_mmap_page *pc = md->base;
-
- /*
- * ensure all reads are done before we write the tail out.
- */
- /* mb(); */
- pc->data_tail = tail;
-}
-
static void advance_output(size_t size)
{
bytes_written += size;
}
}
-static int process_synthesized_event(event_t *event,
- struct sample_data *sample __used,
+static int process_synthesized_event(union perf_event *event,
+ struct perf_sample *sample __used,
struct perf_session *self __used)
{
write_output(event, event->header.size);
return 0;
}
-static void mmap_read(struct mmap_data *md)
+static void mmap_read(struct perf_mmap *md)
{
- unsigned int head = mmap_read_head(md);
+ unsigned int head = perf_mmap__read_head(md);
unsigned int old = md->prev;
unsigned char *data = md->base + page_size;
unsigned long size;
void *buf;
- int diff;
- /*
- * 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.
- *
- * If we somehow ended up ahead of the head, we got messed up.
- *
- * In either case, truncate and restart at head.
- */
- diff = head - old;
- if (diff < 0) {
- fprintf(stderr, "WARNING: failed to keep up with mmap data\n");
- /*
- * head points to a known good entry, start there.
- */
- old = head;
- }
+ if (old == head)
+ return;
- if (old != head)
- samples++;
+ samples++;
size = head - old;
write_output(buf, size);
md->prev = old;
- mmap_write_tail(md, old);
+ perf_mmap__write_tail(md, old);
}
static volatile int done = 0;
kill(getpid(), signr);
}
-static int group_fd;
-
-static struct perf_header_attr *get_header_attr(struct perf_event_attr *a, int nr)
-{
- struct perf_header_attr *h_attr;
-
- if (nr < session->header.attrs) {
- h_attr = session->header.attr[nr];
- } else {
- h_attr = perf_header_attr__new(a);
- if (h_attr != NULL)
- if (perf_header__add_attr(&session->header, h_attr) < 0) {
- perf_header_attr__delete(h_attr);
- h_attr = NULL;
- }
- }
-
- return h_attr;
-}
-
-static void create_counter(struct perf_evsel *evsel, int cpu)
+static void config_attr(struct perf_evsel *evsel, struct perf_evlist *evlist)
{
- char *filter = evsel->filter;
struct perf_event_attr *attr = &evsel->attr;
- struct perf_header_attr *h_attr;
int track = !evsel->idx; /* only the first counter needs these */
- int thread_index;
- int ret;
- struct {
- u64 count;
- u64 time_enabled;
- u64 time_running;
- u64 id;
- } read_data;
- /*
- * Check if parse_single_tracepoint_event has already asked for
- * PERF_SAMPLE_TIME.
- *
- * XXX this is kludgy but short term fix for problems introduced by
- * eac23d1c that broke 'perf script' by having different sample_types
- * when using multiple tracepoint events when we use a perf binary
- * that tries to use sample_id_all on an older kernel.
- *
- * We need to move counter creation to perf_session, support
- * different sample_types, etc.
- */
- bool time_needed = attr->sample_type & PERF_SAMPLE_TIME;
attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
PERF_FORMAT_TOTAL_TIME_RUNNING |
attr->sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID;
- if (nr_counters > 1)
+ if (evlist->nr_entries > 1)
attr->sample_type |= PERF_SAMPLE_ID;
/*
attr->mmap = track;
attr->comm = track;
- attr->inherit = !no_inherit;
+
if (target_pid == -1 && target_tid == -1 && !system_wide) {
attr->disabled = 1;
attr->enable_on_exec = 1;
}
-retry_sample_id:
- attr->sample_id_all = sample_id_all_avail ? 1 : 0;
+}
- for (thread_index = 0; thread_index < threads->nr; thread_index++) {
-try_again:
- FD(evsel, nr_cpu, thread_index) = sys_perf_event_open(attr, threads->map[thread_index], cpu, group_fd, 0);
+static bool perf_evlist__equal(struct perf_evlist *evlist,
+ struct perf_evlist *other)
+{
+ struct perf_evsel *pos, *pair;
+
+ if (evlist->nr_entries != other->nr_entries)
+ return false;
+
+ pair = list_entry(other->entries.next, struct perf_evsel, node);
- if (FD(evsel, nr_cpu, thread_index) < 0) {
+ list_for_each_entry(pos, &evlist->entries, node) {
+ if (memcmp(&pos->attr, &pair->attr, sizeof(pos->attr) != 0))
+ return false;
+ pair = list_entry(pair->node.next, struct perf_evsel, node);
+ }
+
+ return true;
+}
+
+static void open_counters(struct perf_evlist *evlist)
+{
+ struct perf_evsel *pos;
+
+ list_for_each_entry(pos, &evlist->entries, node) {
+ struct perf_event_attr *attr = &pos->attr;
+ /*
+ * Check if parse_single_tracepoint_event has already asked for
+ * PERF_SAMPLE_TIME.
+ *
+ * XXX this is kludgy but short term fix for problems introduced by
+ * eac23d1c that broke 'perf script' by having different sample_types
+ * when using multiple tracepoint events when we use a perf binary
+ * that tries to use sample_id_all on an older kernel.
+ *
+ * We need to move counter creation to perf_session, support
+ * different sample_types, etc.
+ */
+ bool time_needed = attr->sample_type & PERF_SAMPLE_TIME;
+
+ config_attr(pos, evlist);
+retry_sample_id:
+ attr->sample_id_all = sample_id_all_avail ? 1 : 0;
+try_again:
+ if (perf_evsel__open(pos, evlist->cpus, evlist->threads, group,
+ !no_inherit) < 0) {
int err = errno;
if (err == EPERM || err == EACCES)
}
printf("\n");
error("sys_perf_event_open() syscall returned with %d (%s). /bin/dmesg may provide additional information.\n",
- FD(evsel, nr_cpu, thread_index), strerror(err));
+ err, strerror(err));
#if defined(__i386__) || defined(__x86_64__)
if (attr->type == PERF_TYPE_HARDWARE && err == EOPNOTSUPP)
#endif
die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
- exit(-1);
}
+ }
- h_attr = get_header_attr(attr, evsel->idx);
- if (h_attr == NULL)
- die("nomem\n");
+ if (perf_evlist__set_filters(evlist)) {
+ error("failed to set filter with %d (%s)\n", errno,
+ strerror(errno));
+ exit(-1);
+ }
- if (!file_new) {
- if (memcmp(&h_attr->attr, attr, sizeof(*attr))) {
- fprintf(stderr, "incompatible append\n");
- exit(-1);
- }
- }
+ if (perf_evlist__mmap(evlist, mmap_pages, false) < 0)
+ die("failed to mmap with %d (%s)\n", errno, strerror(errno));
- if (read(FD(evsel, nr_cpu, thread_index), &read_data, sizeof(read_data)) == -1) {
- perror("Unable to read perf file descriptor");
+ if (file_new)
+ session->evlist = evlist;
+ else {
+ if (!perf_evlist__equal(session->evlist, evlist)) {
+ fprintf(stderr, "incompatible append\n");
exit(-1);
}
+ }
- if (perf_header_attr__add_id(h_attr, read_data.id) < 0) {
- pr_warning("Not enough memory to add id\n");
- exit(-1);
- }
-
- assert(FD(evsel, nr_cpu, thread_index) >= 0);
- fcntl(FD(evsel, nr_cpu, thread_index), F_SETFL, O_NONBLOCK);
-
- /*
- * First counter acts as the group leader:
- */
- if (group && group_fd == -1)
- group_fd = FD(evsel, nr_cpu, thread_index);
-
- if (evsel->idx || thread_index) {
- struct perf_evsel *first;
- first = list_entry(evsel_list.next, struct perf_evsel, node);
- ret = ioctl(FD(evsel, nr_cpu, thread_index),
- PERF_EVENT_IOC_SET_OUTPUT,
- FD(first, nr_cpu, 0));
- if (ret) {
- error("failed to set output: %d (%s)\n", errno,
- strerror(errno));
- exit(-1);
- }
- } else {
- 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(evsel, nr_cpu, thread_index), 0);
- 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(evsel, nr_cpu, thread_index);
- event_array[nr_poll].events = POLLIN;
- nr_poll++;
- }
-
- if (filter != NULL) {
- ret = ioctl(FD(evsel, nr_cpu, thread_index),
- PERF_EVENT_IOC_SET_FILTER, filter);
- if (ret) {
- error("failed to set filter with %d (%s)\n", errno,
- strerror(errno));
- exit(-1);
- }
- }
- }
-
- if (!sample_type)
- sample_type = attr->sample_type;
-}
-
-static void open_counters(int cpu)
-{
- struct perf_evsel *pos;
-
- group_fd = -1;
-
- list_for_each_entry(pos, &evsel_list, node)
- create_counter(pos, cpu);
-
- nr_cpu++;
+ perf_session__update_sample_type(session);
}
static int process_buildids(void)
if (!no_buildid)
process_buildids();
- perf_header__write(&session->header, output, true);
+ perf_session__write_header(session, evsel_list, output, true);
perf_session__delete(session);
- perf_evsel_list__delete();
+ perf_evlist__delete(evsel_list);
symbol__exit();
}
}
-static void event__synthesize_guest_os(struct machine *machine, void *data)
+static void perf_event__synthesize_guest_os(struct machine *machine, void *data)
{
int err;
struct perf_session *psession = data;
*method is used to avoid symbol missing when the first addr is
*in module instead of in guest kernel.
*/
- err = event__synthesize_modules(process_synthesized_event,
- psession, machine);
+ err = perf_event__synthesize_modules(process_synthesized_event,
+ psession, machine);
if (err < 0)
pr_err("Couldn't record guest kernel [%d]'s reference"
" relocation symbol.\n", machine->pid);
* We use _stext for guest kernel because guest kernel's /proc/kallsyms
* have no _text sometimes.
*/
- err = event__synthesize_kernel_mmap(process_synthesized_event,
- psession, machine, "_text");
+ err = perf_event__synthesize_kernel_mmap(process_synthesized_event,
+ psession, machine, "_text");
if (err < 0)
- err = event__synthesize_kernel_mmap(process_synthesized_event,
- psession, machine, "_stext");
+ err = perf_event__synthesize_kernel_mmap(process_synthesized_event,
+ psession, machine,
+ "_stext");
if (err < 0)
pr_err("Couldn't record guest kernel [%d]'s reference"
" relocation symbol.\n", machine->pid);
{
int i;
- for (i = 0; i < nr_cpu; i++) {
- if (mmap_array[i].base)
- mmap_read(&mmap_array[i]);
+ for (i = 0; i < evsel_list->cpus->nr; i++) {
+ if (evsel_list->mmap[i].base)
+ mmap_read(&evsel_list->mmap[i]);
}
if (perf_header__has_feat(&session->header, HEADER_TRACE_INFO))
exit(-1);
}
- if (!strcmp(output_name, "-"))
- pipe_output = 1;
- else if (!stat(output_name, &st) && st.st_size) {
- if (write_mode == WRITE_FORCE) {
- char oldname[PATH_MAX];
- snprintf(oldname, sizeof(oldname), "%s.old",
- output_name);
- unlink(oldname);
- rename(output_name, oldname);
+ if (!output_name) {
+ if (!fstat(STDOUT_FILENO, &st) && S_ISFIFO(st.st_mode))
+ pipe_output = 1;
+ else
+ output_name = "perf.data";
+ }
+ if (output_name) {
+ if (!strcmp(output_name, "-"))
+ pipe_output = 1;
+ else if (!stat(output_name, &st) && st.st_size) {
+ if (write_mode == WRITE_FORCE) {
+ char oldname[PATH_MAX];
+ snprintf(oldname, sizeof(oldname), "%s.old",
+ output_name);
+ unlink(oldname);
+ rename(output_name, oldname);
+ }
+ } else if (write_mode == WRITE_APPEND) {
+ write_mode = WRITE_FORCE;
}
- } else if (write_mode == WRITE_APPEND) {
- write_mode = WRITE_FORCE;
}
flags = O_CREAT|O_RDWR;
perf_header__set_feat(&session->header, HEADER_BUILD_ID);
if (!file_new) {
- err = perf_header__read(session, output);
+ err = perf_session__read_header(session, output);
if (err < 0)
goto out_delete_session;
}
- if (have_tracepoints(&evsel_list))
+ if (have_tracepoints(&evsel_list->entries))
perf_header__set_feat(&session->header, HEADER_TRACE_INFO);
- /*
- * perf_session__delete(session) will be called at atexit_header()
- */
- atexit(atexit_header);
-
if (forks) {
child_pid = fork();
if (child_pid < 0) {
}
if (!system_wide && target_tid == -1 && target_pid == -1)
- threads->map[0] = child_pid;
+ evsel_list->threads->map[0] = child_pid;
close(child_ready_pipe[1]);
close(go_pipe[0]);
close(child_ready_pipe[0]);
}
- if (!system_wide && no_inherit && !cpu_list) {
- open_counters(-1);
- } else {
- for (i = 0; i < cpus->nr; i++)
- open_counters(cpus->map[i]);
- }
+ open_counters(evsel_list);
- perf_session__set_sample_type(session, sample_type);
+ /*
+ * perf_session__delete(session) will be called at atexit_header()
+ */
+ atexit(atexit_header);
if (pipe_output) {
err = perf_header__write_pipe(output);
if (err < 0)
return err;
} else if (file_new) {
- err = perf_header__write(&session->header, output, false);
+ err = perf_session__write_header(session, evsel_list,
+ output, false);
if (err < 0)
return err;
}
post_processing_offset = lseek(output, 0, SEEK_CUR);
- perf_session__set_sample_id_all(session, sample_id_all_avail);
-
if (pipe_output) {
- err = event__synthesize_attrs(&session->header,
- process_synthesized_event,
- session);
+ err = perf_session__synthesize_attrs(session,
+ process_synthesized_event);
if (err < 0) {
pr_err("Couldn't synthesize attrs.\n");
return err;
}
- err = event__synthesize_event_types(process_synthesized_event,
- session);
+ err = perf_event__synthesize_event_types(process_synthesized_event,
+ session);
if (err < 0) {
pr_err("Couldn't synthesize event_types.\n");
return err;
}
- if (have_tracepoints(&evsel_list)) {
+ if (have_tracepoints(&evsel_list->entries)) {
/*
* FIXME err <= 0 here actually means that
* there were no tracepoints so its not really
* return this more properly and also
* propagate errors that now are calling die()
*/
- err = event__synthesize_tracing_data(output, &evsel_list,
- process_synthesized_event,
- session);
+ err = perf_event__synthesize_tracing_data(output, evsel_list,
+ process_synthesized_event,
+ session);
if (err <= 0) {
pr_err("Couldn't record tracing data.\n");
return err;
return -1;
}
- err = event__synthesize_kernel_mmap(process_synthesized_event,
- session, machine, "_text");
+ err = perf_event__synthesize_kernel_mmap(process_synthesized_event,
+ session, machine, "_text");
if (err < 0)
- err = event__synthesize_kernel_mmap(process_synthesized_event,
- session, machine, "_stext");
+ err = perf_event__synthesize_kernel_mmap(process_synthesized_event,
+ session, machine, "_stext");
if (err < 0)
pr_err("Couldn't record kernel reference relocation symbol\n"
"Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
"Check /proc/kallsyms permission or run as root.\n");
- err = event__synthesize_modules(process_synthesized_event,
- session, machine);
+ err = perf_event__synthesize_modules(process_synthesized_event,
+ session, machine);
if (err < 0)
pr_err("Couldn't record kernel module information.\n"
"Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
"Check /proc/modules permission or run as root.\n");
if (perf_guest)
- perf_session__process_machines(session, event__synthesize_guest_os);
+ perf_session__process_machines(session,
+ perf_event__synthesize_guest_os);
if (!system_wide)
- event__synthesize_thread_map(threads, process_synthesized_event,
- session);
+ perf_event__synthesize_thread_map(evsel_list->threads,
+ process_synthesized_event,
+ session);
else
- event__synthesize_threads(process_synthesized_event, session);
+ perf_event__synthesize_threads(process_synthesized_event,
+ session);
if (realtime_prio) {
struct sched_param param;
if (hits == samples) {
if (done)
break;
- err = poll(event_array, nr_poll, -1);
+ err = poll(evsel_list->pollfd, evsel_list->nr_fds, -1);
waking++;
}
if (done) {
- for (i = 0; i < nr_cpu; i++) {
+ for (i = 0; i < evsel_list->cpus->nr; i++) {
struct perf_evsel *pos;
- list_for_each_entry(pos, &evsel_list, node) {
+ list_for_each_entry(pos, &evsel_list->entries, node) {
for (thread = 0;
- thread < threads->nr;
+ thread < evsel_list->threads->nr;
thread++)
ioctl(FD(pos, i, thread),
PERF_EVENT_IOC_DISABLE);
static bool force, append_file;
const struct option record_options[] = {
- OPT_CALLBACK('e', "event", NULL, "event",
+ OPT_CALLBACK('e', "event", &evsel_list, "event",
"event selector. use 'perf list' to list available events",
parse_events),
- OPT_CALLBACK(0, "filter", NULL, "filter",
+ OPT_CALLBACK(0, "filter", &evsel_list, "filter",
"event filter", parse_filter),
OPT_INTEGER('p', "pid", &target_pid,
"record events on existing process id"),
"do not update the buildid cache"),
OPT_BOOLEAN('B', "no-buildid", &no_buildid,
"do not collect buildids in perf.data"),
+ OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
+ "monitor event in cgroup name only",
+ parse_cgroups),
OPT_END()
};
int err = -ENOMEM;
struct perf_evsel *pos;
+ evsel_list = perf_evlist__new(NULL, NULL);
+ if (evsel_list == NULL)
+ return -ENOMEM;
+
argc = parse_options(argc, argv, record_options, record_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
if (!argc && target_pid == -1 && target_tid == -1 &&
write_mode = WRITE_FORCE;
}
+ if (nr_cgroups && !system_wide) {
+ fprintf(stderr, "cgroup monitoring only available in"
+ " system-wide mode\n");
+ usage_with_options(record_usage, record_options);
+ }
+
symbol__init();
if (no_buildid_cache || no_buildid)
disable_buildid_cache();
- if (list_empty(&evsel_list) && perf_evsel_list__create_default() < 0) {
+ if (evsel_list->nr_entries == 0 &&
+ perf_evlist__add_default(evsel_list) < 0) {
pr_err("Not enough memory for event selector list\n");
goto out_symbol_exit;
}
if (target_pid != -1)
target_tid = target_pid;
- threads = thread_map__new(target_pid, target_tid);
- if (threads == NULL) {
- pr_err("Problems finding threads of monitor\n");
+ if (perf_evlist__create_maps(evsel_list, target_pid,
+ target_tid, cpu_list) < 0)
usage_with_options(record_usage, record_options);
- }
- cpus = cpu_map__new(cpu_list);
- if (cpus == NULL) {
- perror("failed to parse CPUs map");
- return -1;
- }
-
- list_for_each_entry(pos, &evsel_list, node) {
- if (perf_evsel__alloc_fd(pos, cpus->nr, threads->nr) < 0)
+ list_for_each_entry(pos, &evsel_list->entries, node) {
+ if (perf_evsel__alloc_fd(pos, evsel_list->cpus->nr,
+ evsel_list->threads->nr) < 0)
goto out_free_fd;
if (perf_header__push_event(pos->attr.config, event_name(pos)))
goto out_free_fd;
}
- event_array = malloc((sizeof(struct pollfd) * MAX_NR_CPUS *
- MAX_COUNTERS * threads->nr));
- if (!event_array)
+
+ if (perf_evlist__alloc_pollfd(evsel_list) < 0)
goto out_free_fd;
if (user_interval != ULLONG_MAX)
} else {
fprintf(stderr, "frequency and count are zero, aborting\n");
err = -EINVAL;
- goto out_free_event_array;
+ goto out_free_fd;
}
err = __cmd_record(argc, argv);
-
-out_free_event_array:
- free(event_array);
out_free_fd:
- thread_map__delete(threads);
- threads = NULL;
+ perf_evlist__delete_maps(evsel_list);
out_symbol_exit:
symbol__exit();
return err;
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