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builtin-timechart.c
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builtin-timechart.c
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/*
* builtin-timechart.c - make an svg timechart of system activity
*
* (C) Copyright 2009 Intel Corporation
*
* Authors:
* Arjan van de Ven <[email protected]>
*
* 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 <traceevent/event-parse.h>
#include "builtin.h"
#include "util/util.h"
#include "util/color.h"
#include <linux/list.h>
#include "util/cache.h"
#include "util/evlist.h"
#include "util/evsel.h"
#include <linux/rbtree.h>
#include "util/symbol.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/event.h"
#include "util/session.h"
#include "util/svghelper.h"
#include "util/tool.h"
#include "util/data.h"
#define SUPPORT_OLD_POWER_EVENTS 1
#define PWR_EVENT_EXIT -1
struct per_pid;
struct power_event;
struct wake_event;
struct timechart {
struct perf_tool tool;
struct per_pid *all_data;
struct power_event *power_events;
struct wake_event *wake_events;
int proc_num;
unsigned int numcpus;
u64 min_freq, /* Lowest CPU frequency seen */
max_freq, /* Highest CPU frequency seen */
turbo_frequency,
first_time, last_time;
bool power_only,
tasks_only,
with_backtrace,
topology;
};
struct per_pidcomm;
struct cpu_sample;
/*
* 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;
};
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;
const char *backtrace;
};
#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;
const char *backtrace;
};
struct process_filter {
char *name;
int pid;
struct process_filter *next;
};
static struct process_filter *process_filter;
static struct per_pid *find_create_pid(struct timechart *tchart, int pid)
{
struct per_pid *cursor = tchart->all_data;
while (cursor) {
if (cursor->pid == pid)
return cursor;
cursor = cursor->next;
}
cursor = zalloc(sizeof(*cursor));
assert(cursor != NULL);
cursor->pid = pid;
cursor->next = tchart->all_data;
tchart->all_data = cursor;
return cursor;
}
static void pid_set_comm(struct timechart *tchart, int pid, char *comm)
{
struct per_pid *p;
struct per_pidcomm *c;
p = find_create_pid(tchart, 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 = zalloc(sizeof(*c));
assert(c != NULL);
c->comm = strdup(comm);
p->current = c;
c->next = p->all;
p->all = c;
}
static void pid_fork(struct timechart *tchart, int pid, int ppid, u64 timestamp)
{
struct per_pid *p, *pp;
p = find_create_pid(tchart, pid);
pp = find_create_pid(tchart, ppid);
p->ppid = ppid;
if (pp->current && pp->current->comm && !p->current)
pid_set_comm(tchart, 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(struct timechart *tchart, int pid, u64 timestamp)
{
struct per_pid *p;
p = find_create_pid(tchart, pid);
p->end_time = timestamp;
if (p->current)
p->current->end_time = timestamp;
}
static void pid_put_sample(struct timechart *tchart, int pid, int type,
unsigned int cpu, u64 start, u64 end,
const char *backtrace)
{
struct per_pid *p;
struct per_pidcomm *c;
struct cpu_sample *sample;
p = find_create_pid(tchart, pid);
c = p->current;
if (!c) {
c = zalloc(sizeof(*c));
assert(c != NULL);
p->current = c;
c->next = p->all;
p->all = c;
}
sample = zalloc(sizeof(*sample));
assert(sample != NULL);
sample->start_time = start;
sample->end_time = end;
sample->type = type;
sample->next = c->samples;
sample->cpu = cpu;
sample->backtrace = backtrace;
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;
}
#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(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample __maybe_unused,
struct machine *machine __maybe_unused)
{
struct timechart *tchart = container_of(tool, struct timechart, tool);
pid_set_comm(tchart, event->comm.tid, event->comm.comm);
return 0;
}
static int process_fork_event(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample __maybe_unused,
struct machine *machine __maybe_unused)
{
struct timechart *tchart = container_of(tool, struct timechart, tool);
pid_fork(tchart, event->fork.pid, event->fork.ppid, event->fork.time);
return 0;
}
static int process_exit_event(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample __maybe_unused,
struct machine *machine __maybe_unused)
{
struct timechart *tchart = container_of(tool, struct timechart, tool);
pid_exit(tchart, event->fork.pid, event->fork.time);
return 0;
}
#ifdef SUPPORT_OLD_POWER_EVENTS
static int use_old_power_events;
#endif
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(struct timechart *tchart, int cpu, u64 timestamp)
{
struct power_event *pwr = zalloc(sizeof(*pwr));
if (!pwr)
return;
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 = tchart->power_events;
tchart->power_events = pwr;
}
static void p_state_change(struct timechart *tchart, int cpu, u64 timestamp, u64 new_freq)
{
struct power_event *pwr;
if (new_freq > 8000000) /* detect invalid data */
return;
pwr = zalloc(sizeof(*pwr));
if (!pwr)
return;
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 = tchart->power_events;
if (!pwr->start_time)
pwr->start_time = tchart->first_time;
tchart->power_events = pwr;
cpus_pstate_state[cpu] = new_freq;
cpus_pstate_start_times[cpu] = timestamp;
if ((u64)new_freq > tchart->max_freq)
tchart->max_freq = new_freq;
if (new_freq < tchart->min_freq || tchart->min_freq == 0)
tchart->min_freq = new_freq;
if (new_freq == tchart->max_freq - 1000)
tchart->turbo_frequency = tchart->max_freq;
}
static void sched_wakeup(struct timechart *tchart, int cpu, u64 timestamp,
int waker, int wakee, u8 flags, const char *backtrace)
{
struct per_pid *p;
struct wake_event *we = zalloc(sizeof(*we));
if (!we)
return;
we->time = timestamp;
we->waker = waker;
we->backtrace = backtrace;
if ((flags & TRACE_FLAG_HARDIRQ) || (flags & TRACE_FLAG_SOFTIRQ))
we->waker = -1;
we->wakee = wakee;
we->next = tchart->wake_events;
tchart->wake_events = we;
p = find_create_pid(tchart, 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(tchart, p->pid, p->current->state, cpu,
p->current->state_since, timestamp, NULL);
p->current->state_since = timestamp;
p->current->state = TYPE_WAITING;
}
}
static void sched_switch(struct timechart *tchart, int cpu, u64 timestamp,
int prev_pid, int next_pid, u64 prev_state,
const char *backtrace)
{
struct per_pid *p = NULL, *prev_p;
prev_p = find_create_pid(tchart, prev_pid);
p = find_create_pid(tchart, next_pid);
if (prev_p->current && prev_p->current->state != TYPE_NONE)
pid_put_sample(tchart, prev_pid, TYPE_RUNNING, cpu,
prev_p->current->state_since, timestamp,
backtrace);
if (p && p->current) {
if (p->current->state != TYPE_NONE)
pid_put_sample(tchart, next_pid, p->current->state, cpu,
p->current->state_since, timestamp,
backtrace);
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 (prev_state & 2)
prev_p->current->state = TYPE_BLOCKED;
if (prev_state == 0)
prev_p->current->state = TYPE_WAITING;
}
}
static const char *cat_backtrace(union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
struct addr_location al;
unsigned int i;
char *p = NULL;
size_t p_len;
u8 cpumode = PERF_RECORD_MISC_USER;
struct addr_location tal;
struct ip_callchain *chain = sample->callchain;
FILE *f = open_memstream(&p, &p_len);
if (!f) {
perror("open_memstream error");
return NULL;
}
if (!chain)
goto exit;
if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
fprintf(stderr, "problem processing %d event, skipping it.\n",
event->header.type);
goto exit;
}
for (i = 0; i < chain->nr; i++) {
u64 ip;
if (callchain_param.order == ORDER_CALLEE)
ip = chain->ips[i];
else
ip = chain->ips[chain->nr - i - 1];
if (ip >= PERF_CONTEXT_MAX) {
switch (ip) {
case PERF_CONTEXT_HV:
cpumode = PERF_RECORD_MISC_HYPERVISOR;
break;
case PERF_CONTEXT_KERNEL:
cpumode = PERF_RECORD_MISC_KERNEL;
break;
case PERF_CONTEXT_USER:
cpumode = PERF_RECORD_MISC_USER;
break;
default:
pr_debug("invalid callchain context: "
"%"PRId64"\n", (s64) ip);
/*
* It seems the callchain is corrupted.
* Discard all.
*/
zfree(&p);
goto exit;
}
continue;
}
tal.filtered = 0;
thread__find_addr_location(al.thread, machine, cpumode,
MAP__FUNCTION, ip, &tal);
if (tal.sym)
fprintf(f, "..... %016" PRIx64 " %s\n", ip,
tal.sym->name);
else
fprintf(f, "..... %016" PRIx64 "\n", ip);
}
exit:
fclose(f);
return p;
}
typedef int (*tracepoint_handler)(struct timechart *tchart,
struct perf_evsel *evsel,
struct perf_sample *sample,
const char *backtrace);
static int process_sample_event(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct perf_evsel *evsel,
struct machine *machine)
{
struct timechart *tchart = container_of(tool, struct timechart, tool);
if (evsel->attr.sample_type & PERF_SAMPLE_TIME) {
if (!tchart->first_time || tchart->first_time > sample->time)
tchart->first_time = sample->time;
if (tchart->last_time < sample->time)
tchart->last_time = sample->time;
}
if (evsel->handler != NULL) {
tracepoint_handler f = evsel->handler;
return f(tchart, evsel, sample,
cat_backtrace(event, sample, machine));
}
return 0;
}
static int
process_sample_cpu_idle(struct timechart *tchart __maybe_unused,
struct perf_evsel *evsel,
struct perf_sample *sample,
const char *backtrace __maybe_unused)
{
u32 state = perf_evsel__intval(evsel, sample, "state");
u32 cpu_id = perf_evsel__intval(evsel, sample, "cpu_id");
if (state == (u32)PWR_EVENT_EXIT)
c_state_end(tchart, cpu_id, sample->time);
else
c_state_start(cpu_id, sample->time, state);
return 0;
}
static int
process_sample_cpu_frequency(struct timechart *tchart,
struct perf_evsel *evsel,
struct perf_sample *sample,
const char *backtrace __maybe_unused)
{
u32 state = perf_evsel__intval(evsel, sample, "state");
u32 cpu_id = perf_evsel__intval(evsel, sample, "cpu_id");
p_state_change(tchart, cpu_id, sample->time, state);
return 0;
}
static int
process_sample_sched_wakeup(struct timechart *tchart,
struct perf_evsel *evsel,
struct perf_sample *sample,
const char *backtrace)
{
u8 flags = perf_evsel__intval(evsel, sample, "common_flags");
int waker = perf_evsel__intval(evsel, sample, "common_pid");
int wakee = perf_evsel__intval(evsel, sample, "pid");
sched_wakeup(tchart, sample->cpu, sample->time, waker, wakee, flags, backtrace);
return 0;
}
static int
process_sample_sched_switch(struct timechart *tchart,
struct perf_evsel *evsel,
struct perf_sample *sample,
const char *backtrace)
{
int prev_pid = perf_evsel__intval(evsel, sample, "prev_pid");
int next_pid = perf_evsel__intval(evsel, sample, "next_pid");
u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state");
sched_switch(tchart, sample->cpu, sample->time, prev_pid, next_pid,
prev_state, backtrace);
return 0;
}
#ifdef SUPPORT_OLD_POWER_EVENTS
static int
process_sample_power_start(struct timechart *tchart __maybe_unused,
struct perf_evsel *evsel,
struct perf_sample *sample,
const char *backtrace __maybe_unused)
{
u64 cpu_id = perf_evsel__intval(evsel, sample, "cpu_id");
u64 value = perf_evsel__intval(evsel, sample, "value");
c_state_start(cpu_id, sample->time, value);
return 0;
}
static int
process_sample_power_end(struct timechart *tchart,
struct perf_evsel *evsel __maybe_unused,
struct perf_sample *sample,
const char *backtrace __maybe_unused)
{
c_state_end(tchart, sample->cpu, sample->time);
return 0;
}
static int
process_sample_power_frequency(struct timechart *tchart,
struct perf_evsel *evsel,
struct perf_sample *sample,
const char *backtrace __maybe_unused)
{
u64 cpu_id = perf_evsel__intval(evsel, sample, "cpu_id");
u64 value = perf_evsel__intval(evsel, sample, "value");
p_state_change(tchart, cpu_id, sample->time, value);
return 0;
}
#endif /* SUPPORT_OLD_POWER_EVENTS */
/*
* 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(struct timechart *tchart)
{
u64 cpu;
struct power_event *pwr;
for (cpu = 0; cpu <= tchart->numcpus; cpu++) {
/* C state */
#if 0
pwr = zalloc(sizeof(*pwr));
if (!pwr)
return;
pwr->state = cpus_cstate_state[cpu];
pwr->start_time = cpus_cstate_start_times[cpu];
pwr->end_time = tchart->last_time;
pwr->cpu = cpu;
pwr->type = CSTATE;
pwr->next = tchart->power_events;
tchart->power_events = pwr;
#endif
/* P state */
pwr = zalloc(sizeof(*pwr));
if (!pwr)
return;
pwr->state = cpus_pstate_state[cpu];
pwr->start_time = cpus_pstate_start_times[cpu];
pwr->end_time = tchart->last_time;
pwr->cpu = cpu;
pwr->type = PSTATE;
pwr->next = tchart->power_events;
if (!pwr->start_time)
pwr->start_time = tchart->first_time;
if (!pwr->state)
pwr->state = tchart->min_freq;
tchart->power_events = pwr;
}
}
/*
* Sort the pid datastructure
*/
static void sort_pids(struct timechart *tchart)
{
struct per_pid *new_list, *p, *cursor, *prev;
/* sort by ppid first, then by pid, lowest to highest */
new_list = NULL;
while (tchart->all_data) {
p = tchart->all_data;
tchart->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;
}
}
tchart->all_data = new_list;
}
static void draw_c_p_states(struct timechart *tchart)
{
struct power_event *pwr;
pwr = tchart->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 = tchart->power_events;
while (pwr) {
if (pwr->type == PSTATE) {
if (!pwr->state)
pwr->state = tchart->min_freq;
svg_pstate(pwr->cpu, pwr->start_time, pwr->end_time, pwr->state);
}
pwr = pwr->next;
}
}
static void draw_wakeups(struct timechart *tchart)
{
struct wake_event *we;
struct per_pid *p;
struct per_pidcomm *c;
we = tchart->wake_events;
while (we) {
int from = 0, to = 0;
char *task_from = NULL, *task_to = NULL;
/* locate the column of the waker and wakee */
p = tchart->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) {
from = c->Y;
task_from = strdup(c->comm);
}
if (p->pid == we->wakee && !to) {
to = c->Y;
task_to = strdup(c->comm);
}
}
c = c->next;
}
c = p->all;
while (c) {
if (p->pid == we->waker && !from) {
from = c->Y;
task_from = strdup(c->comm);
}
if (p->pid == we->wakee && !to) {
to = c->Y;
task_to = strdup(c->comm);
}
c = c->next;
}
}
p = p->next;
}
if (!task_from) {
task_from = malloc(40);
sprintf(task_from, "[%i]", we->waker);
}
if (!task_to) {
task_to = malloc(40);
sprintf(task_to, "[%i]", we->wakee);
}
if (we->waker == -1)
svg_interrupt(we->time, to, we->backtrace);
else if (from && to && abs(from - to) == 1)
svg_wakeline(we->time, from, to, we->backtrace);
else
svg_partial_wakeline(we->time, from, task_from, to,
task_to, we->backtrace);
we = we->next;
free(task_from);
free(task_to);
}
}
static void draw_cpu_usage(struct timechart *tchart)
{
struct per_pid *p;
struct per_pidcomm *c;
struct cpu_sample *sample;
p = tchart->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,
p->pid,
c->comm,
sample->backtrace);
}
sample = sample->next;
}
c = c->next;
}
p = p->next;
}
}
static void draw_process_bars(struct timechart *tchart)
{
struct per_pid *p;
struct per_pidcomm *c;
struct cpu_sample *sample;
int Y = 0;
Y = 2 * tchart->numcpus + 2;
p = tchart->all_data;
while (p) {
c = p->all;
while (c) {
if (!c->display) {
c->Y = 0;
c = c->next;
continue;
}
svg_box(Y, c->start_time, c->end_time, "process");
sample = c->samples;
while (sample) {
if (sample->type == TYPE_RUNNING)
svg_running(Y, sample->cpu,
sample->start_time,
sample->end_time,
sample->backtrace);
if (sample->type == TYPE_BLOCKED)
svg_blocked(Y, sample->cpu,
sample->start_time,
sample->end_time,
sample->backtrace);
if (sample->type == TYPE_WAITING)
svg_waiting(Y, sample->cpu,
sample->start_time,
sample->end_time,
sample->backtrace);
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 void add_process_filter(const char *string)
{
int pid = strtoull(string, NULL, 10);
struct process_filter *filt = malloc(sizeof(*filt));
if (!filt)
return;
filt->name = strdup(string);
filt->pid = pid;
filt->next = process_filter;
process_filter = filt;
}
static int passes_filter(struct per_pid *p, struct per_pidcomm *c)
{
struct process_filter *filt;
if (!process_filter)
return 1;
filt = process_filter;
while (filt) {
if (filt->pid && p->pid == filt->pid)
return 1;
if (strcmp(filt->name, c->comm) == 0)
return 1;
filt = filt->next;
}
return 0;
}
static int determine_display_tasks_filtered(struct timechart *tchart)
{
struct per_pid *p;
struct per_pidcomm *c;
int count = 0;
p = tchart->all_data;
while (p) {
p->display = 0;
if (p->start_time == 1)
p->start_time = tchart->first_time;
/* no exit marker, task kept running to the end */
if (p->end_time == 0)
p->end_time = tchart->last_time;
c = p->all;
while (c) {
c->display = 0;
if (c->start_time == 1)
c->start_time = tchart->first_time;
if (passes_filter(p, c)) {
c->display = 1;
p->display = 1;
count++;
}
if (c->end_time == 0)
c->end_time = tchart->last_time;
c = c->next;
}
p = p->next;
}
return count;
}
static int determine_display_tasks(struct timechart *tchart, u64 threshold)
{
struct per_pid *p;
struct per_pidcomm *c;
int count = 0;
if (process_filter)
return determine_display_tasks_filtered(tchart);
p = tchart->all_data;
while (p) {
p->display = 0;
if (p->start_time == 1)
p->start_time = tchart->first_time;
/* no exit marker, task kept running to the end */
if (p->end_time == 0)