perf timechart: Add a process filter

During the Kernel Summit demo of perf/ftrace/timechart, there
was a feature request to have a process filter for timechart so
that you can zoom into one or a few processes that you are
really interested in.

This patch adds basic support for this feature, the -p
(--process) option now can select a PID or a process name to be
shown. Multiple -p options are allowed, and the combined set
will be included in the output.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20091020070939.7d0fb8a7@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Arjan van de Ven 2009-10-20 07:09:39 +09:00 committed by Ingo Molnar
parent c258449bc9
commit bbe2987bea
2 changed files with 106 additions and 4 deletions

View File

@ -31,9 +31,12 @@ OPTIONS
-w::
--width=::
Select the width of the SVG file (default: 1000)
-p::
-P::
--power-only::
Only output the CPU power section of the diagram
-p::
--process::
Select the processes to display, by name or PID
SEE ALSO

View File

@ -153,6 +153,17 @@ static struct wake_event *wake_events;
struct sample_wrapper *all_samples;
struct process_filter;
struct process_filter {
char *name;
int pid;
struct process_filter *next;
};
static struct process_filter *process_filter;
static struct per_pid *find_create_pid(int pid)
{
struct per_pid *cursor = all_data;
@ -763,11 +774,11 @@ static void draw_wakeups(void)
c = p->all;
while (c) {
if (c->Y && c->start_time <= we->time && c->end_time >= we->time) {
if (p->pid == we->waker) {
if (p->pid == we->waker && !from) {
from = c->Y;
task_from = strdup(c->comm);
}
if (p->pid == we->wakee) {
if (p->pid == we->wakee && !to) {
to = c->Y;
task_to = strdup(c->comm);
}
@ -882,12 +893,89 @@ static void draw_process_bars(void)
}
}
static void add_process_filter(const char *string)
{
struct process_filter *filt;
int pid;
pid = strtoull(string, NULL, 10);
filt = malloc(sizeof(struct process_filter));
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(void)
{
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;
c = p->all;
while (c) {
c->display = 0;
if (c->start_time == 1)
c->start_time = first_time;
if (passes_filter(p, c)) {
c->display = 1;
p->display = 1;
count++;
}
if (c->end_time == 0)
c->end_time = last_time;
c = c->next;
}
p = p->next;
}
return count;
}
static int determine_display_tasks(u64 threshold)
{
struct per_pid *p;
struct per_pidcomm *c;
int count = 0;
if (process_filter)
return determine_display_tasks_filtered();
p = all_data;
while (p) {
p->display = 0;
@ -1153,6 +1241,14 @@ static int __cmd_record(int argc, const char **argv)
return cmd_record(i, rec_argv, NULL);
}
static int
parse_process(const struct option *opt __used, const char *arg, int __used unset)
{
if (arg)
add_process_filter(arg);
return 0;
}
static const struct option options[] = {
OPT_STRING('i', "input", &input_name, "file",
"input file name"),
@ -1160,8 +1256,11 @@ static const struct option options[] = {
"output file name"),
OPT_INTEGER('w', "width", &svg_page_width,
"page width"),
OPT_BOOLEAN('p', "power-only", &power_only,
OPT_BOOLEAN('P', "power-only", &power_only,
"output power data only"),
OPT_CALLBACK('p', "process", NULL, "process",
"process selector. Pass a pid or process name.",
parse_process),
OPT_END()
};