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-rw-r--r--tools/perf/builtin-sched.c351
1 files changed, 146 insertions, 205 deletions
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index ce2d5be4f30e..26b782f26ee1 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -11,6 +11,7 @@
#include "util/trace-event.h"
#include "util/debug.h"
+#include "util/data_map.h"
#include <sys/types.h>
#include <sys/prctl.h>
@@ -20,14 +21,6 @@
#include <math.h>
static char const *input_name = "perf.data";
-static int input;
-static unsigned long page_size;
-static unsigned long mmap_window = 32;
-
-static unsigned long total_comm = 0;
-
-static struct rb_root threads;
-static struct thread *last_match;
static struct perf_header *header;
static u64 sample_type;
@@ -35,11 +28,11 @@ static u64 sample_type;
static char default_sort_order[] = "avg, max, switch, runtime";
static char *sort_order = default_sort_order;
+static int profile_cpu = -1;
+
#define PR_SET_NAME 15 /* Set process name */
#define MAX_CPUS 4096
-#define BUG_ON(x) assert(!(x))
-
static u64 run_measurement_overhead;
static u64 sleep_measurement_overhead;
@@ -74,6 +67,7 @@ enum sched_event_type {
SCHED_EVENT_RUN,
SCHED_EVENT_SLEEP,
SCHED_EVENT_WAKEUP,
+ SCHED_EVENT_MIGRATION,
};
struct sched_atom {
@@ -226,7 +220,7 @@ static void calibrate_sleep_measurement_overhead(void)
static struct sched_atom *
get_new_event(struct task_desc *task, u64 timestamp)
{
- struct sched_atom *event = calloc(1, sizeof(*event));
+ struct sched_atom *event = zalloc(sizeof(*event));
unsigned long idx = task->nr_events;
size_t size;
@@ -294,7 +288,7 @@ add_sched_event_wakeup(struct task_desc *task, u64 timestamp,
return;
}
- wakee_event->wait_sem = calloc(1, sizeof(*wakee_event->wait_sem));
+ wakee_event->wait_sem = zalloc(sizeof(*wakee_event->wait_sem));
sem_init(wakee_event->wait_sem, 0, 0);
wakee_event->specific_wait = 1;
event->wait_sem = wakee_event->wait_sem;
@@ -324,7 +318,7 @@ static struct task_desc *register_pid(unsigned long pid, const char *comm)
if (task)
return task;
- task = calloc(1, sizeof(*task));
+ task = zalloc(sizeof(*task));
task->pid = pid;
task->nr = nr_tasks;
strcpy(task->comm, comm);
@@ -398,6 +392,8 @@ process_sched_event(struct task_desc *this_task __used, struct sched_atom *atom)
ret = sem_post(atom->wait_sem);
BUG_ON(ret);
break;
+ case SCHED_EVENT_MIGRATION:
+ break;
default:
BUG_ON(1);
}
@@ -632,29 +628,6 @@ static void test_calibrations(void)
printf("the sleep test took %Ld nsecs\n", T1-T0);
}
-static int
-process_comm_event(event_t *event, unsigned long offset, unsigned long head)
-{
- struct thread *thread;
-
- thread = threads__findnew(event->comm.pid, &threads, &last_match);
-
- dump_printf("%p [%p]: perf_event_comm: %s:%d\n",
- (void *)(offset + head),
- (void *)(long)(event->header.size),
- event->comm.comm, event->comm.pid);
-
- if (thread == NULL ||
- thread__set_comm(thread, event->comm.comm)) {
- dump_printf("problem processing perf_event_comm, skipping event.\n");
- return -1;
- }
- total_comm++;
-
- return 0;
-}
-
-
struct raw_event_sample {
u32 size;
char data[0];
@@ -745,6 +718,22 @@ struct trace_fork_event {
u32 child_pid;
};
+struct trace_migrate_task_event {
+ u32 size;
+
+ u16 common_type;
+ u8 common_flags;
+ u8 common_preempt_count;
+ u32 common_pid;
+ u32 common_tgid;
+
+ char comm[16];
+ u32 pid;
+
+ u32 prio;
+ u32 cpu;
+};
+
struct trace_sched_handler {
void (*switch_event)(struct trace_switch_event *,
struct event *,
@@ -769,6 +758,12 @@ struct trace_sched_handler {
int cpu,
u64 timestamp,
struct thread *thread);
+
+ void (*migrate_task_event)(struct trace_migrate_task_event *,
+ struct event *,
+ int cpu,
+ u64 timestamp,
+ struct thread *thread);
};
@@ -941,9 +936,7 @@ __thread_latency_insert(struct rb_root *root, struct work_atoms *data,
static void thread_atoms_insert(struct thread *thread)
{
- struct work_atoms *atoms;
-
- atoms = calloc(sizeof(*atoms), 1);
+ struct work_atoms *atoms = zalloc(sizeof(*atoms));
if (!atoms)
die("No memory");
@@ -975,9 +968,7 @@ add_sched_out_event(struct work_atoms *atoms,
char run_state,
u64 timestamp)
{
- struct work_atom *atom;
-
- atom = calloc(sizeof(*atom), 1);
+ struct work_atom *atom = zalloc(sizeof(*atom));
if (!atom)
die("Non memory");
@@ -1058,8 +1049,8 @@ latency_switch_event(struct trace_switch_event *switch_event,
die("hm, delta: %Ld < 0 ?\n", delta);
- sched_out = threads__findnew(switch_event->prev_pid, &threads, &last_match);
- sched_in = threads__findnew(switch_event->next_pid, &threads, &last_match);
+ sched_out = threads__findnew(switch_event->prev_pid);
+ sched_in = threads__findnew(switch_event->next_pid);
out_events = thread_atoms_search(&atom_root, sched_out, &cmp_pid);
if (!out_events) {
@@ -1092,13 +1083,10 @@ latency_runtime_event(struct trace_runtime_event *runtime_event,
u64 timestamp,
struct thread *this_thread __used)
{
- struct work_atoms *atoms;
- struct thread *thread;
+ struct thread *thread = threads__findnew(runtime_event->pid);
+ struct work_atoms *atoms = thread_atoms_search(&atom_root, thread, &cmp_pid);
BUG_ON(cpu >= MAX_CPUS || cpu < 0);
-
- thread = threads__findnew(runtime_event->pid, &threads, &last_match);
- atoms = thread_atoms_search(&atom_root, thread, &cmp_pid);
if (!atoms) {
thread_atoms_insert(thread);
atoms = thread_atoms_search(&atom_root, thread, &cmp_pid);
@@ -1125,7 +1113,7 @@ latency_wakeup_event(struct trace_wakeup_event *wakeup_event,
if (!wakeup_event->success)
return;
- wakee = threads__findnew(wakeup_event->pid, &threads, &last_match);
+ wakee = threads__findnew(wakeup_event->pid);
atoms = thread_atoms_search(&atom_root, wakee, &cmp_pid);
if (!atoms) {
thread_atoms_insert(wakee);
@@ -1139,7 +1127,12 @@ latency_wakeup_event(struct trace_wakeup_event *wakeup_event,
atom = list_entry(atoms->work_list.prev, struct work_atom, list);
- if (atom->state != THREAD_SLEEPING)
+ /*
+ * You WILL be missing events if you've recorded only
+ * one CPU, or are only looking at only one, so don't
+ * make useless noise.
+ */
+ if (profile_cpu == -1 && atom->state != THREAD_SLEEPING)
nr_state_machine_bugs++;
nr_timestamps++;
@@ -1152,11 +1145,51 @@ latency_wakeup_event(struct trace_wakeup_event *wakeup_event,
atom->wake_up_time = timestamp;
}
+static void
+latency_migrate_task_event(struct trace_migrate_task_event *migrate_task_event,
+ struct event *__event __used,
+ int cpu __used,
+ u64 timestamp,
+ struct thread *thread __used)
+{
+ struct work_atoms *atoms;
+ struct work_atom *atom;
+ struct thread *migrant;
+
+ /*
+ * Only need to worry about migration when profiling one CPU.
+ */
+ if (profile_cpu == -1)
+ return;
+
+ migrant = threads__findnew(migrate_task_event->pid);
+ atoms = thread_atoms_search(&atom_root, migrant, &cmp_pid);
+ if (!atoms) {
+ thread_atoms_insert(migrant);
+ register_pid(migrant->pid, migrant->comm);
+ atoms = thread_atoms_search(&atom_root, migrant, &cmp_pid);
+ if (!atoms)
+ die("migration-event: Internal tree error");
+ add_sched_out_event(atoms, 'R', timestamp);
+ }
+
+ BUG_ON(list_empty(&atoms->work_list));
+
+ atom = list_entry(atoms->work_list.prev, struct work_atom, list);
+ atom->sched_in_time = atom->sched_out_time = atom->wake_up_time = timestamp;
+
+ nr_timestamps++;
+
+ if (atom->sched_out_time > timestamp)
+ nr_unordered_timestamps++;
+}
+
static struct trace_sched_handler lat_ops = {
.wakeup_event = latency_wakeup_event,
.switch_event = latency_switch_event,
.runtime_event = latency_runtime_event,
.fork_event = latency_fork_event,
+ .migrate_task_event = latency_migrate_task_event,
};
static void output_lat_thread(struct work_atoms *work_list)
@@ -1385,8 +1418,8 @@ map_switch_event(struct trace_switch_event *switch_event,
die("hm, delta: %Ld < 0 ?\n", delta);
- sched_out = threads__findnew(switch_event->prev_pid, &threads, &last_match);
- sched_in = threads__findnew(switch_event->next_pid, &threads, &last_match);
+ sched_out = threads__findnew(switch_event->prev_pid);
+ sched_in = threads__findnew(switch_event->next_pid);
curr_thread[this_cpu] = sched_in;
@@ -1517,6 +1550,26 @@ process_sched_exit_event(struct event *event,
}
static void
+process_sched_migrate_task_event(struct raw_event_sample *raw,
+ struct event *event,
+ int cpu __used,
+ u64 timestamp __used,
+ struct thread *thread __used)
+{
+ struct trace_migrate_task_event migrate_task_event;
+
+ FILL_COMMON_FIELDS(migrate_task_event, event, raw->data);
+
+ FILL_ARRAY(migrate_task_event, comm, event, raw->data);
+ FILL_FIELD(migrate_task_event, pid, event, raw->data);
+ FILL_FIELD(migrate_task_event, prio, event, raw->data);
+ FILL_FIELD(migrate_task_event, cpu, event, raw->data);
+
+ if (trace_handler->migrate_task_event)
+ trace_handler->migrate_task_event(&migrate_task_event, event, cpu, timestamp, thread);
+}
+
+static void
process_raw_event(event_t *raw_event __used, void *more_data,
int cpu, u64 timestamp, struct thread *thread)
{
@@ -1539,23 +1592,23 @@ process_raw_event(event_t *raw_event __used, void *more_data,
process_sched_fork_event(raw, event, cpu, timestamp, thread);
if (!strcmp(event->name, "sched_process_exit"))
process_sched_exit_event(event, cpu, timestamp, thread);
+ if (!strcmp(event->name, "sched_migrate_task"))
+ process_sched_migrate_task_event(raw, event, cpu, timestamp, thread);
}
-static int
-process_sample_event(event_t *event, unsigned long offset, unsigned long head)
+static int process_sample_event(event_t *event)
{
- char level;
- int show = 0;
- struct dso *dso = NULL;
struct thread *thread;
u64 ip = event->ip.ip;
u64 timestamp = -1;
u32 cpu = -1;
u64 period = 1;
void *more_data = event->ip.__more_data;
- int cpumode;
- thread = threads__findnew(event->ip.pid, &threads, &last_match);
+ if (!(sample_type & PERF_SAMPLE_RAW))
+ return 0;
+
+ thread = threads__findnew(event->ip.pid);
if (sample_type & PERF_SAMPLE_TIME) {
timestamp = *(u64 *)more_data;
@@ -1573,177 +1626,64 @@ process_sample_event(event_t *event, unsigned long offset, unsigned long head)
more_data += sizeof(u64);
}
- dump_printf("%p [%p]: PERF_RECORD_SAMPLE (IP, %d): %d/%d: %p period: %Ld\n",
- (void *)(offset + head),
- (void *)(long)(event->header.size),
+ dump_printf("(IP, %d): %d/%d: %p period: %Ld\n",
event->header.misc,
event->ip.pid, event->ip.tid,
(void *)(long)ip,
(long long)period);
- dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
-
if (thread == NULL) {
- eprintf("problem processing %d event, skipping it.\n",
- event->header.type);
+ pr_debug("problem processing %d event, skipping it.\n",
+ event->header.type);
return -1;
}
- cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
-
- if (cpumode == PERF_RECORD_MISC_KERNEL) {
- show = SHOW_KERNEL;
- level = 'k';
-
- dso = kernel_dso;
-
- dump_printf(" ...... dso: %s\n", dso->name);
-
- } else if (cpumode == PERF_RECORD_MISC_USER) {
-
- show = SHOW_USER;
- level = '.';
-
- } else {
- show = SHOW_HV;
- level = 'H';
-
- dso = hypervisor_dso;
+ dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
- dump_printf(" ...... dso: [hypervisor]\n");
- }
+ if (profile_cpu != -1 && profile_cpu != (int) cpu)
+ return 0;
- if (sample_type & PERF_SAMPLE_RAW)
- process_raw_event(event, more_data, cpu, timestamp, thread);
+ process_raw_event(event, more_data, cpu, timestamp, thread);
return 0;
}
-static int
-process_event(event_t *event, unsigned long offset, unsigned long head)
+static int process_lost_event(event_t *event __used)
{
- trace_event(event);
-
- nr_events++;
- switch (event->header.type) {
- case PERF_RECORD_MMAP:
- return 0;
- case PERF_RECORD_LOST:
- nr_lost_chunks++;
- nr_lost_events += event->lost.lost;
- return 0;
-
- case PERF_RECORD_COMM:
- return process_comm_event(event, offset, head);
+ nr_lost_chunks++;
+ nr_lost_events += event->lost.lost;
- case PERF_RECORD_EXIT ... PERF_RECORD_READ:
- return 0;
+ return 0;
+}
- case PERF_RECORD_SAMPLE:
- return process_sample_event(event, offset, head);
+static int sample_type_check(u64 type)
+{
+ sample_type = type;
- case PERF_RECORD_MAX:
- default:
+ if (!(sample_type & PERF_SAMPLE_RAW)) {
+ fprintf(stderr,
+ "No trace sample to read. Did you call perf record "
+ "without -R?");
return -1;
}
return 0;
}
+static struct perf_file_handler file_handler = {
+ .process_sample_event = process_sample_event,
+ .process_comm_event = event__process_comm,
+ .process_lost_event = process_lost_event,
+ .sample_type_check = sample_type_check,
+};
+
static int read_events(void)
{
- int ret, rc = EXIT_FAILURE;
- unsigned long offset = 0;
- unsigned long head = 0;
- struct stat perf_stat;
- event_t *event;
- uint32_t size;
- char *buf;
-
- trace_report();
- register_idle_thread(&threads, &last_match);
-
- input = open(input_name, O_RDONLY);
- if (input < 0) {
- perror("failed to open file");
- exit(-1);
- }
-
- ret = fstat(input, &perf_stat);
- if (ret < 0) {
- perror("failed to stat file");
- exit(-1);
- }
-
- if (!perf_stat.st_size) {
- fprintf(stderr, "zero-sized file, nothing to do!\n");
- exit(0);
- }
- header = perf_header__read(input);
- head = header->data_offset;
- sample_type = perf_header__sample_type(header);
-
- if (!(sample_type & PERF_SAMPLE_RAW))
- die("No trace sample to read. Did you call perf record "
- "without -R?");
-
- if (load_kernel() < 0) {
- perror("failed to load kernel symbols");
- return EXIT_FAILURE;
- }
-
-remap:
- buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
- MAP_SHARED, input, offset);
- if (buf == MAP_FAILED) {
- perror("failed to mmap file");
- exit(-1);
- }
-
-more:
- event = (event_t *)(buf + head);
-
- size = event->header.size;
- if (!size)
- size = 8;
-
- if (head + event->header.size >= page_size * mmap_window) {
- unsigned long shift = page_size * (head / page_size);
- int res;
-
- res = munmap(buf, page_size * mmap_window);
- assert(res == 0);
-
- offset += shift;
- head -= shift;
- goto remap;
- }
-
- size = event->header.size;
-
-
- if (!size || process_event(event, offset, head) < 0) {
-
- /*
- * assume we lost track of the stream, check alignment, and
- * increment a single u64 in the hope to catch on again 'soon'.
- */
-
- if (unlikely(head & 7))
- head &= ~7ULL;
-
- size = 8;
- }
-
- head += size;
-
- if (offset + head < (unsigned long)perf_stat.st_size)
- goto more;
-
- rc = EXIT_SUCCESS;
- close(input);
+ register_idle_thread();
+ register_perf_file_handler(&file_handler);
- return rc;
+ return mmap_dispatch_perf_file(&header, input_name, 0, 0,
+ &event__cwdlen, &event__cwd);
}
static void print_bad_events(void)
@@ -1883,6 +1823,8 @@ static const struct option latency_options[] = {
"sort by key(s): runtime, switch, avg, max"),
OPT_BOOLEAN('v', "verbose", &verbose,
"be more verbose (show symbol address, etc)"),
+ OPT_INTEGER('C', "CPU", &profile_cpu,
+ "CPU to profile on"),
OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
"dump raw trace in ASCII"),
OPT_END()
@@ -1960,8 +1902,7 @@ static int __cmd_record(int argc, const char **argv)
int cmd_sched(int argc, const char **argv, const char *prefix __used)
{
- symbol__init();
- page_size = getpagesize();
+ symbol__init(0);
argc = parse_options(argc, argv, sched_options, sched_usage,
PARSE_OPT_STOP_AT_NON_OPTION);