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linux/tools/perf/builtin-timechart.c

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perf: Add the timechart tool timechart is a tool to visualize what is going on in the system. The user makes a trace of what is going on with > perf record --timechart /usr/bin/some_command and then can turn the output of this into an svg file > perf timechart which then can be viewed with any SVG view; inkscape works well enough for me. The idea behind timechart is to create a "infinitely zoomable" picture; something that has high level information on a 1:1 zoom level, but which exposes more details every time you zoom into a specific area. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20090912130713.6a77bbc0@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-09-11 22:53:05 -07:00
/*
* builtin-timechart.c - make an svg timechart of system activity
*
* (C) Copyright 2009 Intel Corporation
*
* Authors:
* Arjan van de Ven <arjan@linux.intel.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; version 2
* of the License.
*/
#include "builtin.h"
#include "util/util.h"
#include "util/color.h"
#include <linux/list.h>
#include "util/cache.h"
#include <linux/rbtree.h>
#include "util/symbol.h"
#include "util/string.h"
#include "util/callchain.h"
#include "util/strlist.h"
#include "perf.h"
#include "util/header.h"
#include "util/parse-options.h"
#include "util/parse-events.h"
#include "util/svghelper.h"
static char const *input_name = "perf.data";
static char const *output_name = "output.svg";
static unsigned long page_size;
static unsigned long mmap_window = 32;
static u64 sample_type;
static unsigned int numcpus;
static u64 min_freq; /* Lowest CPU frequency seen */
static u64 max_freq; /* Highest CPU frequency seen */
static u64 turbo_frequency;
static u64 first_time, last_time;
static struct perf_header *header;
struct per_pid;
struct per_pidcomm;
struct cpu_sample;
struct power_event;
struct wake_event;
struct sample_wrapper;
/*
* Datastructure layout:
* We keep an list of "pid"s, matching the kernels notion of a task struct.
* Each "pid" entry, has a list of "comm"s.
* this is because we want to track different programs different, while
* exec will reuse the original pid (by design).
* Each comm has a list of samples that will be used to draw
* final graph.
*/
struct per_pid {
struct per_pid *next;
int pid;
int ppid;
u64 start_time;
u64 end_time;
u64 total_time;
int display;
struct per_pidcomm *all;
struct per_pidcomm *current;
int painted;
};
struct per_pidcomm {
struct per_pidcomm *next;
u64 start_time;
u64 end_time;
u64 total_time;
int Y;
int display;
long state;
u64 state_since;
char *comm;
struct cpu_sample *samples;
};
struct sample_wrapper {
struct sample_wrapper *next;
u64 timestamp;
unsigned char data[0];
};
#define TYPE_NONE 0
#define TYPE_RUNNING 1
#define TYPE_WAITING 2
#define TYPE_BLOCKED 3
struct cpu_sample {
struct cpu_sample *next;
u64 start_time;
u64 end_time;
int type;
int cpu;
};
static struct per_pid *all_data;
#define CSTATE 1
#define PSTATE 2
struct power_event {
struct power_event *next;
int type;
int state;
u64 start_time;
u64 end_time;
int cpu;
};
struct wake_event {
struct wake_event *next;
int waker;
int wakee;
u64 time;
};
static struct power_event *power_events;
static struct wake_event *wake_events;
struct sample_wrapper *all_samples;
static struct per_pid *find_create_pid(int pid)
{
struct per_pid *cursor = all_data;
while (cursor) {
if (cursor->pid == pid)
return cursor;
cursor = cursor->next;
}
cursor = malloc(sizeof(struct per_pid));
assert(cursor != NULL);
memset(cursor, 0, sizeof(struct per_pid));
cursor->pid = pid;
cursor->next = all_data;
all_data = cursor;
return cursor;
}
static void pid_set_comm(int pid, char *comm)
{
struct per_pid *p;
struct per_pidcomm *c;
p = find_create_pid(pid);
c = p->all;
while (c) {
if (c->comm && strcmp(c->comm, comm) == 0) {
p->current = c;
return;
}
if (!c->comm) {
c->comm = strdup(comm);
p->current = c;
return;
}
c = c->next;
}
c = malloc(sizeof(struct per_pidcomm));
assert(c != NULL);
memset(c, 0, sizeof(struct per_pidcomm));
c->comm = strdup(comm);
p->current = c;
c->next = p->all;
p->all = c;
}
static void pid_fork(int pid, int ppid, u64 timestamp)
{
struct per_pid *p, *pp;
p = find_create_pid(pid);
pp = find_create_pid(ppid);
p->ppid = ppid;
if (pp->current && pp->current->comm && !p->current)
pid_set_comm(pid, pp->current->comm);
p->start_time = timestamp;
if (p->current) {
p->current->start_time = timestamp;
p->current->state_since = timestamp;
}
}
static void pid_exit(int pid, u64 timestamp)
{
struct per_pid *p;
p = find_create_pid(pid);
p->end_time = timestamp;
if (p->current)
p->current->end_time = timestamp;
}
static void
pid_put_sample(int pid, int type, unsigned int cpu, u64 start, u64 end)
{
struct per_pid *p;
struct per_pidcomm *c;
struct cpu_sample *sample;
p = find_create_pid(pid);
c = p->current;
if (!c) {
c = malloc(sizeof(struct per_pidcomm));
assert(c != NULL);
memset(c, 0, sizeof(struct per_pidcomm));
p->current = c;
c->next = p->all;
p->all = c;
}
sample = malloc(sizeof(struct cpu_sample));
assert(sample != NULL);
memset(sample, 0, sizeof(struct cpu_sample));
sample->start_time = start;
sample->end_time = end;
sample->type = type;
sample->next = c->samples;
sample->cpu = cpu;
c->samples = sample;
if (sample->type == TYPE_RUNNING && end > start && start > 0) {
c->total_time += (end-start);
p->total_time += (end-start);
}
if (c->start_time == 0 || c->start_time > start)
c->start_time = start;
if (p->start_time == 0 || p->start_time > start)
p->start_time = start;
if (cpu > numcpus)
numcpus = cpu;
}
#define MAX_CPUS 4096
static u64 cpus_cstate_start_times[MAX_CPUS];
static int cpus_cstate_state[MAX_CPUS];
static u64 cpus_pstate_start_times[MAX_CPUS];
static u64 cpus_pstate_state[MAX_CPUS];
static int
process_comm_event(event_t *event)
{
pid_set_comm(event->comm.pid, event->comm.comm);
return 0;
}
static int
process_fork_event(event_t *event)
{
pid_fork(event->fork.pid, event->fork.ppid, event->fork.time);
return 0;
}
static int
process_exit_event(event_t *event)
{
pid_exit(event->fork.pid, event->fork.time);
return 0;
}
struct trace_entry {
u32 size;
unsigned short type;
unsigned char flags;
unsigned char preempt_count;
int pid;
int tgid;
};
struct power_entry {
struct trace_entry te;
s64 type;
s64 value;
};
#define TASK_COMM_LEN 16
struct wakeup_entry {
struct trace_entry te;
char comm[TASK_COMM_LEN];
int pid;
int prio;
int success;
};
/*
* trace_flag_type is an enumeration that holds different
* states when a trace occurs. These are:
* IRQS_OFF - interrupts were disabled
* IRQS_NOSUPPORT - arch does not support irqs_disabled_flags
* NEED_RESCED - reschedule is requested
* HARDIRQ - inside an interrupt handler
* SOFTIRQ - inside a softirq handler
*/
enum trace_flag_type {
TRACE_FLAG_IRQS_OFF = 0x01,
TRACE_FLAG_IRQS_NOSUPPORT = 0x02,
TRACE_FLAG_NEED_RESCHED = 0x04,
TRACE_FLAG_HARDIRQ = 0x08,
TRACE_FLAG_SOFTIRQ = 0x10,
};
struct sched_switch {
struct trace_entry te;
char prev_comm[TASK_COMM_LEN];
int prev_pid;
int prev_prio;
long prev_state; /* Arjan weeps. */
char next_comm[TASK_COMM_LEN];
int next_pid;
int next_prio;
};
static void c_state_start(int cpu, u64 timestamp, int state)
{
cpus_cstate_start_times[cpu] = timestamp;
cpus_cstate_state[cpu] = state;
}
static void c_state_end(int cpu, u64 timestamp)
{
struct power_event *pwr;
pwr = malloc(sizeof(struct power_event));
if (!pwr)
return;
memset(pwr, 0, sizeof(struct power_event));
pwr->state = cpus_cstate_state[cpu];
pwr->start_time = cpus_cstate_start_times[cpu];
pwr->end_time = timestamp;
pwr->cpu = cpu;
pwr->type = CSTATE;
pwr->next = power_events;
power_events = pwr;
}
static void p_state_change(int cpu, u64 timestamp, u64 new_freq)
{
struct power_event *pwr;
pwr = malloc(sizeof(struct power_event));
if (new_freq > 8000000) /* detect invalid data */
return;
if (!pwr)
return;
memset(pwr, 0, sizeof(struct power_event));
pwr->state = cpus_pstate_state[cpu];
pwr->start_time = cpus_pstate_start_times[cpu];
pwr->end_time = timestamp;
pwr->cpu = cpu;
pwr->type = PSTATE;
pwr->next = power_events;
if (!pwr->start_time)
pwr->start_time = first_time;
power_events = pwr;
cpus_pstate_state[cpu] = new_freq;
cpus_pstate_start_times[cpu] = timestamp;
if ((u64)new_freq > max_freq)
max_freq = new_freq;
if (new_freq < min_freq || min_freq == 0)
min_freq = new_freq;
if (new_freq == max_freq - 1000)
turbo_frequency = max_freq;
}
static void
sched_wakeup(int cpu, u64 timestamp, int pid, struct trace_entry *te)
{
struct wake_event *we;
struct per_pid *p;
struct wakeup_entry *wake = (void *)te;
we = malloc(sizeof(struct wake_event));
if (!we)
return;
memset(we, 0, sizeof(struct wake_event));
we->time = timestamp;
we->waker = pid;
if ((te->flags & TRACE_FLAG_HARDIRQ) || (te->flags & TRACE_FLAG_SOFTIRQ))
we->waker = -1;
we->wakee = wake->pid;
we->next = wake_events;
wake_events = we;
p = find_create_pid(we->wakee);
if (p && p->current && p->current->state == TYPE_NONE) {
p->current->state_since = timestamp;
p->current->state = TYPE_WAITING;
}
if (p && p->current && p->current->state == TYPE_BLOCKED) {
pid_put_sample(p->pid, p->current->state, cpu, p->current->state_since, timestamp);
p->current->state_since = timestamp;
p->current->state = TYPE_WAITING;
}
}
static void sched_switch(int cpu, u64 timestamp, struct trace_entry *te)
{
struct per_pid *p = NULL, *prev_p;
struct sched_switch *sw = (void *)te;
prev_p = find_create_pid(sw->prev_pid);
p = find_create_pid(sw->next_pid);
if (prev_p->current && prev_p->current->state != TYPE_NONE)
pid_put_sample(sw->prev_pid, TYPE_RUNNING, cpu, prev_p->current->state_since, timestamp);
if (p && p->current) {
if (p->current->state != TYPE_NONE)
pid_put_sample(sw->next_pid, p->current->state, cpu, p->current->state_since, timestamp);
p->current->state_since = timestamp;
p->current->state = TYPE_RUNNING;
}
if (prev_p->current) {
prev_p->current->state = TYPE_NONE;
prev_p->current->state_since = timestamp;
if (sw->prev_state & 2)
prev_p->current->state = TYPE_BLOCKED;
if (sw->prev_state == 0)
prev_p->current->state = TYPE_WAITING;
}
}
static int
process_sample_event(event_t *event)
{
int cursor = 0;
u64 addr = 0;
u64 stamp = 0;
u32 cpu = 0;
u32 pid = 0;
struct trace_entry *te;
if (sample_type & PERF_SAMPLE_IP)
cursor++;
if (sample_type & PERF_SAMPLE_TID) {
pid = event->sample.array[cursor]>>32;
cursor++;
}
if (sample_type & PERF_SAMPLE_TIME) {
stamp = event->sample.array[cursor++];
if (!first_time || first_time > stamp)
first_time = stamp;
if (last_time < stamp)
last_time = stamp;
}
if (sample_type & PERF_SAMPLE_ADDR)
addr = event->sample.array[cursor++];
if (sample_type & PERF_SAMPLE_ID)
cursor++;
if (sample_type & PERF_SAMPLE_STREAM_ID)
cursor++;
if (sample_type & PERF_SAMPLE_CPU)
cpu = event->sample.array[cursor++] & 0xFFFFFFFF;
if (sample_type & PERF_SAMPLE_PERIOD)
cursor++;
te = (void *)&event->sample.array[cursor];
if (sample_type & PERF_SAMPLE_RAW && te->size > 0) {
char *event_str;
struct power_entry *pe;
pe = (void *)te;
event_str = perf_header__find_event(te->type);
if (!event_str)
return 0;
if (strcmp(event_str, "power:power_start") == 0)
c_state_start(cpu, stamp, pe->value);
if (strcmp(event_str, "power:power_end") == 0)
c_state_end(cpu, stamp);
if (strcmp(event_str, "power:power_frequency") == 0)
p_state_change(cpu, stamp, pe->value);
if (strcmp(event_str, "sched:sched_wakeup") == 0)
sched_wakeup(cpu, stamp, pid, te);
if (strcmp(event_str, "sched:sched_switch") == 0)
sched_switch(cpu, stamp, te);
}
return 0;
}
/*
* After the last sample we need to wrap up the current C/P state
* and close out each CPU for these.
*/
static void end_sample_processing(void)
{
u64 cpu;
struct power_event *pwr;
for (cpu = 0; cpu < numcpus; cpu++) {
pwr = malloc(sizeof(struct power_event));
if (!pwr)
return;
memset(pwr, 0, sizeof(struct power_event));
/* C state */
#if 0
pwr->state = cpus_cstate_state[cpu];
pwr->start_time = cpus_cstate_start_times[cpu];
pwr->end_time = last_time;
pwr->cpu = cpu;
pwr->type = CSTATE;
pwr->next = power_events;
power_events = pwr;
#endif
/* P state */
pwr = malloc(sizeof(struct power_event));
if (!pwr)
return;
memset(pwr, 0, sizeof(struct power_event));
pwr->state = cpus_pstate_state[cpu];
pwr->start_time = cpus_pstate_start_times[cpu];
pwr->end_time = last_time;
pwr->cpu = cpu;
pwr->type = PSTATE;
pwr->next = power_events;
if (!pwr->start_time)
pwr->start_time = first_time;
if (!pwr->state)
pwr->state = min_freq;
power_events = pwr;
}
}
static u64 sample_time(event_t *event)
{
int cursor;
cursor = 0;
if (sample_type & PERF_SAMPLE_IP)
cursor++;
if (sample_type & PERF_SAMPLE_TID)
cursor++;
if (sample_type & PERF_SAMPLE_TIME)
return event->sample.array[cursor];
return 0;
}
/*
* We first queue all events, sorted backwards by insertion.
* The order will get flipped later.
*/
static int
queue_sample_event(event_t *event)
{
struct sample_wrapper *copy, *prev;
int size;
size = event->sample.header.size + sizeof(struct sample_wrapper) + 8;
copy = malloc(size);
if (!copy)
return 1;
memset(copy, 0, size);
copy->next = NULL;
copy->timestamp = sample_time(event);
memcpy(&copy->data, event, event->sample.header.size);
/* insert in the right place in the list */
if (!all_samples) {
/* first sample ever */
all_samples = copy;
return 0;
}
if (all_samples->timestamp < copy->timestamp) {
/* insert at the head of the list */
copy->next = all_samples;
all_samples = copy;
return 0;
}
prev = all_samples;
while (prev->next) {
if (prev->next->timestamp < copy->timestamp) {
copy->next = prev->next;
prev->next = copy;
return 0;
}
prev = prev->next;
}
/* insert at the end of the list */
prev->next = copy;
return 0;
}
static void sort_queued_samples(void)
{
struct sample_wrapper *cursor, *next;
cursor = all_samples;
all_samples = NULL;
while (cursor) {
next = cursor->next;
cursor->next = all_samples;
all_samples = cursor;
cursor = next;
}
}
/*
* Sort the pid datastructure
*/
static void sort_pids(void)
{
struct per_pid *new_list, *p, *cursor, *prev;
/* sort by ppid first, then by pid, lowest to highest */
new_list = NULL;
while (all_data) {
p = all_data;
all_data = p->next;
p->next = NULL;
if (new_list == NULL) {
new_list = p;
p->next = NULL;
continue;
}
prev = NULL;
cursor = new_list;
while (cursor) {
if (cursor->ppid > p->ppid ||
(cursor->ppid == p->ppid && cursor->pid > p->pid)) {
/* must insert before */
if (prev) {
p->next = prev->next;
prev->next = p;
cursor = NULL;
continue;
} else {
p->next = new_list;
new_list = p;
cursor = NULL;
continue;
}
}
prev = cursor;
cursor = cursor->next;
if (!cursor)
prev->next = p;
}
}
all_data = new_list;
}
static void draw_c_p_states(void)
{
struct power_event *pwr;
pwr = power_events;
/*
* two pass drawing so that the P state bars are on top of the C state blocks
*/
while (pwr) {
if (pwr->type == CSTATE)
svg_cstate(pwr->cpu, pwr->start_time, pwr->end_time, pwr->state);
pwr = pwr->next;
}
pwr = power_events;
while (pwr) {
if (pwr->type == PSTATE) {
if (!pwr->state)
pwr->state = min_freq;
svg_pstate(pwr->cpu, pwr->start_time, pwr->end_time, pwr->state);
}
pwr = pwr->next;
}
}
static void draw_wakeups(void)
{
struct wake_event *we;
struct per_pid *p;
struct per_pidcomm *c;
we = wake_events;
while (we) {
int from = 0, to = 0;
/* locate the column of the waker and wakee */
p = all_data;
while (p) {
if (p->pid == we->waker || p->pid == we->wakee) {
c = p->all;
while (c) {
if (c->Y && c->start_time <= we->time && c->end_time >= we->time) {
if (p->pid == we->waker)
from = c->Y;
if (p->pid == we->wakee)
to = c->Y;
}
c = c->next;
}
}
p = p->next;
}
if (we->waker == -1)
svg_interrupt(we->time, to);
else if (from && to && abs(from - to) == 1)
svg_wakeline(we->time, from, to);
else
svg_partial_wakeline(we->time, from, to);
we = we->next;
}
}
static void draw_cpu_usage(void)
{
struct per_pid *p;
struct per_pidcomm *c;
struct cpu_sample *sample;
p = all_data;
while (p) {
c = p->all;
while (c) {
sample = c->samples;
while (sample) {
if (sample->type == TYPE_RUNNING)
svg_process(sample->cpu, sample->start_time, sample->end_time, "sample", c->comm);
sample = sample->next;
}
c = c->next;
}
p = p->next;
}
}
static void draw_process_bars(void)
{
struct per_pid *p;
struct per_pidcomm *c;
struct cpu_sample *sample;
int Y = 0;
Y = 2 * numcpus + 2;
p = all_data;
while (p) {
c = p->all;
while (c) {
if (!c->display) {
c->Y = 0;
c = c->next;
continue;
}
svg_box(Y, p->start_time, p->end_time, "process");
sample = c->samples;
while (sample) {
if (sample->type == TYPE_RUNNING)
svg_sample(Y, sample->cpu, sample->start_time, sample->end_time, "sample");
if (sample->type == TYPE_BLOCKED)
svg_box(Y, sample->start_time, sample->end_time, "blocked");
if (sample->type == TYPE_WAITING)
svg_box(Y, sample->start_time, sample->end_time, "waiting");
sample = sample->next;
}
if (c->comm) {
char comm[256];
if (c->total_time > 5000000000) /* 5 seconds */
sprintf(comm, "%s:%i (%2.2fs)", c->comm, p->pid, c->total_time / 1000000000.0);
else
sprintf(comm, "%s:%i (%3.1fms)", c->comm, p->pid, c->total_time / 1000000.0);
svg_text(Y, c->start_time, comm);
}
c->Y = Y;
Y++;
c = c->next;
}
p = p->next;
}
}
static int determine_display_tasks(u64 threshold)
{
struct per_pid *p;
struct per_pidcomm *c;
int count = 0;
p = all_data;
while (p) {
p->display = 0;
if (p->start_time == 1)
p->start_time = first_time;
/* no exit marker, task kept running to the end */
if (p->end_time == 0)
p->end_time = last_time;
if (p->total_time >= threshold)
p->display = 1;
c = p->all;
while (c) {
c->display = 0;
if (c->start_time == 1)
c->start_time = first_time;
if (c->total_time >= threshold) {
c->display = 1;
count++;
}
if (c->end_time == 0)
c->end_time = last_time;
c = c->next;
}
p = p->next;
}
return count;
}
#define TIME_THRESH 10000000
static void write_svg_file(const char *filename)
{
u64 i;
int count;
numcpus++;
count = determine_display_tasks(TIME_THRESH);
/* We'd like to show at least 15 tasks; be less picky if we have fewer */
if (count < 15)
count = determine_display_tasks(TIME_THRESH / 10);
open_svg(filename, numcpus, count);
svg_time_grid(first_time, last_time);
svg_legenda();
for (i = 0; i < numcpus; i++)
svg_cpu_box(i, max_freq, turbo_frequency);
draw_cpu_usage();
draw_process_bars();
draw_c_p_states();
draw_wakeups();
svg_close();
}
static int
process_event(event_t *event)
{
switch (event->header.type) {
case PERF_EVENT_COMM:
return process_comm_event(event);
case PERF_EVENT_FORK:
return process_fork_event(event);
case PERF_EVENT_EXIT:
return process_exit_event(event);
case PERF_EVENT_SAMPLE:
return queue_sample_event(event);
/*
* We dont process them right now but they are fine:
*/
case PERF_EVENT_MMAP:
case PERF_EVENT_THROTTLE:
case PERF_EVENT_UNTHROTTLE:
return 0;
default:
return -1;
}
return 0;
}
static void process_samples(void)
{
struct sample_wrapper *cursor;
event_t *event;
sort_queued_samples();
cursor = all_samples;
while (cursor) {
event = (void *)&cursor->data;
cursor = cursor->next;
process_sample_event(event);
}
}
static int __cmd_timechart(void)
{
int ret, rc = EXIT_FAILURE;
unsigned long offset = 0;
unsigned long head, shift;
struct stat statbuf;
event_t *event;
uint32_t size;
char *buf;
int input;
input = open(input_name, O_RDONLY);
if (input < 0) {
fprintf(stderr, " failed to open file: %s", input_name);
if (!strcmp(input_name, "perf.data"))
fprintf(stderr, " (try 'perf record' first)");
fprintf(stderr, "\n");
exit(-1);
}
ret = fstat(input, &statbuf);
if (ret < 0) {
perror("failed to stat file");
exit(-1);
}
if (!statbuf.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);
shift = page_size * (head / page_size);
offset += shift;
head -= shift;
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) {
int ret2;
shift = page_size * (head / page_size);
ret2 = munmap(buf, page_size * mmap_window);
assert(ret2 == 0);
offset += shift;
head -= shift;
goto remap;
}
size = event->header.size;
if (!size || process_event(event) < 0) {
printf("%p [%p]: skipping unknown header type: %d\n",
(void *)(offset + head),
(void *)(long)(event->header.size),
event->header.type);
/*
* 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 >= header->data_offset + header->data_size)
goto done;
if (offset + head < (unsigned long)statbuf.st_size)
goto more;
done:
rc = EXIT_SUCCESS;
close(input);
process_samples();
end_sample_processing();
sort_pids();
write_svg_file(output_name);
printf("Written %2.1f seconds of trace to %s.\n", (last_time - first_time) / 1000000000.0, output_name);
return rc;
}
static const char * const report_usage[] = {
"perf report [<options>] <command>",
NULL
};
static const struct option options[] = {
OPT_STRING('i', "input", &input_name, "file",
"input file name"),
OPT_STRING('o', "output", &output_name, "file",
"output file name"),
OPT_END()
};
int cmd_timechart(int argc, const char **argv, const char *prefix __used)
{
symbol__init();
page_size = getpagesize();
argc = parse_options(argc, argv, options, report_usage, 0);
/*
* Any (unrecognized) arguments left?
*/
if (argc)
usage_with_options(report_usage, options);
setup_pager();
return __cmd_timechart();
}
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