#include "util/trace-event.h"
#include "util/debug.h"
+#include "util/data_map.h"
#include <sys/types.h>
#include <sys/prctl.h>
#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 char default_sort_order[] = "avg, max, switch, runtime";
static char *sort_order = default_sort_order;
+static char *cwd;
+static int cwdlen;
+
#define PR_SET_NAME 15 /* Set process name */
#define MAX_CPUS 4096
static unsigned long nr_timestamps;
static unsigned long nr_unordered_timestamps;
static unsigned long nr_state_machine_bugs;
+static unsigned long nr_context_switch_bugs;
static unsigned long nr_events;
static unsigned long nr_lost_chunks;
static unsigned long nr_lost_events;
static u64 all_runtime;
static u64 all_count;
-static int read_events(void);
-
static u64 get_nsecs(void)
{
printf("the sleep test took %Ld nsecs\n", T1-T0);
}
-static void __cmd_replay(void)
-{
- unsigned long i;
-
- calibrate_run_measurement_overhead();
- calibrate_sleep_measurement_overhead();
-
- test_calibrations();
-
- read_events();
-
- printf("nr_run_events: %ld\n", nr_run_events);
- printf("nr_sleep_events: %ld\n", nr_sleep_events);
- printf("nr_wakeup_events: %ld\n", nr_wakeup_events);
-
- if (targetless_wakeups)
- printf("target-less wakeups: %ld\n", targetless_wakeups);
- if (multitarget_wakeups)
- printf("multi-target wakeups: %ld\n", multitarget_wakeups);
- if (nr_run_events_optimized)
- printf("run atoms optimized: %ld\n",
- nr_run_events_optimized);
-
- print_task_traces();
- add_cross_task_wakeups();
-
- create_tasks();
- printf("------------------------------------------------------------\n");
- for (i = 0; i < replay_repeat; i++)
- run_one_test();
-}
-
static int
process_comm_event(event_t *event, unsigned long offset, unsigned long head)
{
/*
* Ignore idle threads:
*/
- if (!work_list->thread->pid)
+ if (!strcmp(work_list->thread->comm, "swapper"))
return;
all_runtime += work_list->total_runtime;
all_count += work_list->nb_atoms;
- ret = printf(" %s-%d ", work_list->thread->comm, work_list->thread->pid);
+ ret = printf(" %s:%d ", work_list->thread->comm, work_list->thread->pid);
for (i = 0; i < 24 - ret; i++)
printf(" ");
}
}
-static void __cmd_lat(void)
-{
- struct rb_node *next;
-
- setup_pager();
- read_events();
- sort_lat();
-
- printf("\n -----------------------------------------------------------------------------------------\n");
- printf(" Task | Runtime ms | Switches | Average delay ms | Maximum delay ms |\n");
- printf(" -----------------------------------------------------------------------------------------\n");
-
- next = rb_first(&sorted_atom_root);
-
- while (next) {
- struct work_atoms *work_list;
-
- work_list = rb_entry(next, struct work_atoms, node);
- output_lat_thread(work_list);
- next = rb_next(next);
- }
-
- printf(" -----------------------------------------------------------------------------------------\n");
- printf(" TOTAL: |%11.3f ms |%9Ld |\n",
- (double)all_runtime/1e6, all_count);
-
- printf(" ---------------------------------------------------\n");
- if (nr_unordered_timestamps && nr_timestamps) {
- printf(" INFO: %.3f%% unordered timestamps (%ld out of %ld)\n",
- (double)nr_unordered_timestamps/(double)nr_timestamps*100.0,
- nr_unordered_timestamps, nr_timestamps);
- } else {
- }
- if (nr_lost_events && nr_events) {
- printf(" INFO: %.3f%% lost events (%ld out of %ld, in %ld chunks)\n",
- (double)nr_lost_events/(double)nr_events*100.0,
- nr_lost_events, nr_events, nr_lost_chunks);
- }
- if (nr_state_machine_bugs && nr_timestamps) {
- printf(" INFO: %.3f%% state machine bugs (%ld out of %ld)",
- (double)nr_state_machine_bugs/(double)nr_timestamps*100.0,
- nr_state_machine_bugs, nr_timestamps);
- if (nr_lost_events)
- printf(" (due to lost events?)");
- printf("\n");
- }
- printf("\n");
-
-}
-
static struct trace_sched_handler *trace_handler;
static void
FILL_FIELD(wakeup_event, success, event, raw->data);
FILL_FIELD(wakeup_event, cpu, event, raw->data);
- trace_handler->wakeup_event(&wakeup_event, event, cpu, timestamp, thread);
+ if (trace_handler->wakeup_event)
+ trace_handler->wakeup_event(&wakeup_event, event, cpu, timestamp, thread);
}
+/*
+ * Track the current task - that way we can know whether there's any
+ * weird events, such as a task being switched away that is not current.
+ */
+static int max_cpu;
+
+static u32 curr_pid[MAX_CPUS] = { [0 ... MAX_CPUS-1] = -1 };
+
+static struct thread *curr_thread[MAX_CPUS];
+
+static char next_shortname1 = 'A';
+static char next_shortname2 = '0';
+
+static void
+map_switch_event(struct trace_switch_event *switch_event,
+ struct event *event __used,
+ int this_cpu,
+ u64 timestamp,
+ struct thread *thread __used)
+{
+ struct thread *sched_out, *sched_in;
+ int new_shortname;
+ u64 timestamp0;
+ s64 delta;
+ int cpu;
+
+ BUG_ON(this_cpu >= MAX_CPUS || this_cpu < 0);
+
+ if (this_cpu > max_cpu)
+ max_cpu = this_cpu;
+
+ timestamp0 = cpu_last_switched[this_cpu];
+ cpu_last_switched[this_cpu] = timestamp;
+ if (timestamp0)
+ delta = timestamp - timestamp0;
+ else
+ delta = 0;
+
+ if (delta < 0)
+ 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);
+
+ curr_thread[this_cpu] = sched_in;
+
+ printf(" ");
+
+ new_shortname = 0;
+ if (!sched_in->shortname[0]) {
+ sched_in->shortname[0] = next_shortname1;
+ sched_in->shortname[1] = next_shortname2;
+
+ if (next_shortname1 < 'Z') {
+ next_shortname1++;
+ } else {
+ next_shortname1='A';
+ if (next_shortname2 < '9') {
+ next_shortname2++;
+ } else {
+ next_shortname2='0';
+ }
+ }
+ new_shortname = 1;
+ }
+
+ for (cpu = 0; cpu <= max_cpu; cpu++) {
+ if (cpu != this_cpu)
+ printf(" ");
+ else
+ printf("*");
+
+ if (curr_thread[cpu]) {
+ if (curr_thread[cpu]->pid)
+ printf("%2s ", curr_thread[cpu]->shortname);
+ else
+ printf(". ");
+ } else
+ printf(" ");
+ }
+
+ printf(" %12.6f secs ", (double)timestamp/1e9);
+ if (new_shortname) {
+ printf("%s => %s:%d\n",
+ sched_in->shortname, sched_in->comm, sched_in->pid);
+ } else {
+ printf("\n");
+ }
+}
+
+
static void
process_sched_switch_event(struct raw_event_sample *raw,
struct event *event,
- int cpu __used,
+ int this_cpu,
u64 timestamp __used,
struct thread *thread __used)
{
FILL_FIELD(switch_event, next_pid, event, raw->data);
FILL_FIELD(switch_event, next_prio, event, raw->data);
- trace_handler->switch_event(&switch_event, event, cpu, timestamp, thread);
+ if (curr_pid[this_cpu] != (u32)-1) {
+ /*
+ * Are we trying to switch away a PID that is
+ * not current?
+ */
+ if (curr_pid[this_cpu] != switch_event.prev_pid)
+ nr_context_switch_bugs++;
+ }
+ if (trace_handler->switch_event)
+ trace_handler->switch_event(&switch_event, event, this_cpu, timestamp, thread);
+
+ curr_pid[this_cpu] = switch_event.next_pid;
}
static void
FILL_FIELD(runtime_event, runtime, event, raw->data);
FILL_FIELD(runtime_event, vruntime, event, raw->data);
- trace_handler->runtime_event(&runtime_event, event, cpu, timestamp, thread);
+ if (trace_handler->runtime_event)
+ trace_handler->runtime_event(&runtime_event, event, cpu, timestamp, thread);
}
static void
FILL_ARRAY(fork_event, child_comm, event, raw->data);
FILL_FIELD(fork_event, child_pid, event, raw->data);
- trace_handler->fork_event(&fork_event, event, cpu, timestamp, thread);
+ if (trace_handler->fork_event)
+ trace_handler->fork_event(&fork_event, event, cpu, timestamp, thread);
}
static void
static int
process_sample_event(event_t *event, unsigned long offset, unsigned long head)
{
- 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;
+
+ if (!(sample_type & PERF_SAMPLE_RAW))
+ return 0;
thread = threads__findnew(event->ip.pid, &threads, &last_match);
more_data += sizeof(u64);
}
- dump_printf("%p [%p]: PERF_EVENT_SAMPLE (IP, %d): %d/%d: %p period: %Ld\n",
+ dump_printf("%p [%p]: PERF_RECORD_SAMPLE (IP, %d): %d/%d: %p period: %Ld\n",
(void *)(offset + head),
(void *)(long)(event->header.size),
event->header.misc,
return -1;
}
- cpumode = event->header.misc & PERF_EVENT_MISC_CPUMODE_MASK;
-
- if (cpumode == PERF_EVENT_MISC_KERNEL) {
- show = SHOW_KERNEL;
- level = 'k';
-
- dso = kernel_dso;
-
- dump_printf(" ...... dso: %s\n", dso->name);
-
- } else if (cpumode == PERF_EVENT_MISC_USER) {
-
- show = SHOW_USER;
- level = '.';
-
- } else {
- show = SHOW_HV;
- level = 'H';
-
- dso = hypervisor_dso;
-
- dump_printf(" ...... dso: [hypervisor]\n");
- }
-
- 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)
+process_lost_event(event_t *event __used,
+ unsigned long offset __used,
+ unsigned long head __used)
{
- trace_event(event);
+ nr_lost_chunks++;
+ nr_lost_events += event->lost.lost;
- nr_events++;
- switch (event->header.type) {
- case PERF_EVENT_MMAP:
- return 0;
- case PERF_EVENT_LOST:
- nr_lost_chunks++;
- nr_lost_events += event->lost.lost;
- return 0;
-
- case PERF_EVENT_COMM:
- return process_comm_event(event, offset, head);
-
- case PERF_EVENT_EXIT ... PERF_EVENT_READ:
- return 0;
+ return 0;
+}
- case PERF_EVENT_SAMPLE:
- return process_sample_event(event, offset, head);
+static int sample_type_check(u64 type)
+{
+ sample_type = type;
- case PERF_EVENT_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 = process_comm_event,
+ .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);
+ register_perf_file_handler(&file_handler);
- input = open(input_name, O_RDONLY);
- if (input < 0) {
- perror("failed to open file");
- exit(-1);
- }
+ return mmap_dispatch_perf_file(&header, input_name, 0, 0, &cwdlen, &cwd);
+}
- ret = fstat(input, &perf_stat);
- if (ret < 0) {
- perror("failed to stat file");
- exit(-1);
+static void print_bad_events(void)
+{
+ if (nr_unordered_timestamps && nr_timestamps) {
+ printf(" INFO: %.3f%% unordered timestamps (%ld out of %ld)\n",
+ (double)nr_unordered_timestamps/(double)nr_timestamps*100.0,
+ nr_unordered_timestamps, nr_timestamps);
}
-
- if (!perf_stat.st_size) {
- fprintf(stderr, "zero-sized file, nothing to do!\n");
- exit(0);
+ if (nr_lost_events && nr_events) {
+ printf(" INFO: %.3f%% lost events (%ld out of %ld, in %ld chunks)\n",
+ (double)nr_lost_events/(double)nr_events*100.0,
+ nr_lost_events, nr_events, nr_lost_chunks);
}
- header = perf_header__read(input);
- head = header->data_offset;
- sample_type = perf_header__sample_type(header);
+ if (nr_state_machine_bugs && nr_timestamps) {
+ printf(" INFO: %.3f%% state machine bugs (%ld out of %ld)",
+ (double)nr_state_machine_bugs/(double)nr_timestamps*100.0,
+ nr_state_machine_bugs, nr_timestamps);
+ if (nr_lost_events)
+ printf(" (due to lost events?)");
+ printf("\n");
+ }
+ if (nr_context_switch_bugs && nr_timestamps) {
+ printf(" INFO: %.3f%% context switch bugs (%ld out of %ld)",
+ (double)nr_context_switch_bugs/(double)nr_timestamps*100.0,
+ nr_context_switch_bugs, nr_timestamps);
+ if (nr_lost_events)
+ printf(" (due to lost events?)");
+ printf("\n");
+ }
+}
- if (!(sample_type & PERF_SAMPLE_RAW))
- die("No trace sample to read. Did you call perf record "
- "without -R?");
+static void __cmd_lat(void)
+{
+ struct rb_node *next;
- if (load_kernel() < 0) {
- perror("failed to load kernel symbols");
- return EXIT_FAILURE;
- }
+ setup_pager();
+ read_events();
+ sort_lat();
+
+ printf("\n -----------------------------------------------------------------------------------------\n");
+ printf(" Task | Runtime ms | Switches | Average delay ms | Maximum delay ms |\n");
+ printf(" -----------------------------------------------------------------------------------------\n");
+
+ next = rb_first(&sorted_atom_root);
+
+ while (next) {
+ struct work_atoms *work_list;
-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);
+ work_list = rb_entry(next, struct work_atoms, node);
+ output_lat_thread(work_list);
+ next = rb_next(next);
}
-more:
- event = (event_t *)(buf + head);
+ printf(" -----------------------------------------------------------------------------------------\n");
+ printf(" TOTAL: |%11.3f ms |%9Ld |\n",
+ (double)all_runtime/1e6, all_count);
- size = event->header.size;
- if (!size)
- size = 8;
+ printf(" ---------------------------------------------------\n");
- if (head + event->header.size >= page_size * mmap_window) {
- unsigned long shift = page_size * (head / page_size);
- int res;
+ print_bad_events();
+ printf("\n");
- res = munmap(buf, page_size * mmap_window);
- assert(res == 0);
+}
- offset += shift;
- head -= shift;
- goto remap;
- }
+static struct trace_sched_handler map_ops = {
+ .wakeup_event = NULL,
+ .switch_event = map_switch_event,
+ .runtime_event = NULL,
+ .fork_event = NULL,
+};
- size = event->header.size;
+static void __cmd_map(void)
+{
+ max_cpu = sysconf(_SC_NPROCESSORS_CONF);
+ setup_pager();
+ read_events();
+ print_bad_events();
+}
- if (!size || process_event(event, offset, head) < 0) {
+static void __cmd_replay(void)
+{
+ unsigned long i;
- /*
- * assume we lost track of the stream, check alignment, and
- * increment a single u64 in the hope to catch on again 'soon'.
- */
+ calibrate_run_measurement_overhead();
+ calibrate_sleep_measurement_overhead();
- if (unlikely(head & 7))
- head &= ~7ULL;
+ test_calibrations();
- size = 8;
- }
+ read_events();
- head += size;
+ printf("nr_run_events: %ld\n", nr_run_events);
+ printf("nr_sleep_events: %ld\n", nr_sleep_events);
+ printf("nr_wakeup_events: %ld\n", nr_wakeup_events);
- if (offset + head < (unsigned long)perf_stat.st_size)
- goto more;
+ if (targetless_wakeups)
+ printf("target-less wakeups: %ld\n", targetless_wakeups);
+ if (multitarget_wakeups)
+ printf("multi-target wakeups: %ld\n", multitarget_wakeups);
+ if (nr_run_events_optimized)
+ printf("run atoms optimized: %ld\n",
+ nr_run_events_optimized);
- rc = EXIT_SUCCESS;
- close(input);
+ print_task_traces();
+ add_cross_task_wakeups();
- return rc;
+ create_tasks();
+ printf("------------------------------------------------------------\n");
+ for (i = 0; i < replay_repeat; i++)
+ run_one_test();
}
+
static const char * const sched_usage[] = {
- "perf sched [<options>] {record|latency|replay|trace}",
+ "perf sched [<options>] {record|latency|map|replay|trace}",
NULL
};
static const struct option sched_options[] = {
+ OPT_STRING('i', "input", &input_name, "file",
+ "input file name"),
OPT_BOOLEAN('v', "verbose", &verbose,
"be more verbose (show symbol address, etc)"),
OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
int cmd_sched(int argc, const char **argv, const char *prefix __used)
{
symbol__init();
- page_size = getpagesize();
argc = parse_options(argc, argv, sched_options, sched_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
}
setup_sorting();
__cmd_lat();
+ } else if (!strcmp(argv[0], "map")) {
+ trace_handler = &map_ops;
+ setup_sorting();
+ __cmd_map();
} else if (!strncmp(argv[0], "rep", 3)) {
trace_handler = &replay_ops;
if (argc) {
projects / linux-2.6-block.git / blobdiff