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perf tools: Configurable per thread proc map processing time out

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The time out to limit the individual proc map processing was hard code
to 500ms. This patch introduce a new option --proc-map-timeout to make
the time limit configurable.

Signed-off-by: Kan Liang <kan.liang@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ying Huang <ying.huang@intel.com>
Link: http://lkml.kernel.org/r/1434549071-25611-2-git-send-email-kan.liang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Kan Liang
2015-06-17 09:51:11 -04:00
committed by Arnaldo Carvalho de Melo
parent 930e6fcd2b
commit 9d9cad763c
17 changed files with 87 additions and 31 deletions
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36
tools/perf/util/event.c
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@@ -213,19 +213,19 @@ static int perf_event__synthesize_fork(struct perf_tool *tool,
return 0;
}
#define PROC_MAP_PARSE_TIMEOUT (500 * 1000000ULL)
int perf_event__synthesize_mmap_events(struct perf_tool *tool,
union perf_event *event,
pid_t pid, pid_t tgid,
perf_event__handler_t process,
struct machine *machine,
bool mmap_data)
bool mmap_data,
unsigned int proc_map_timeout)
{
char filename[PATH_MAX];
FILE *fp;
unsigned long long t;
bool truncation = false;
unsigned long long timeout = proc_map_timeout * 1000000ULL;
int rc = 0;
if (machine__is_default_guest(machine))
@@ -258,8 +258,11 @@ int perf_event__synthesize_mmap_events(struct perf_tool *tool,
if (fgets(bf, sizeof(bf), fp) == NULL)
break;
if ((rdclock() - t) > PROC_MAP_PARSE_TIMEOUT) {
pr_warning("Reading %s time out.\n", filename);
if ((rdclock() - t) > timeout) {
pr_warning("Reading %s time out. "
"You may want to increase "
"the time limit by --proc-map-timeout\n",
filename);
truncation = true;
goto out;
}
@@ -404,7 +407,9 @@ static int __event__synthesize_thread(union perf_event *comm_event,
pid_t pid, int full,
perf_event__handler_t process,
struct perf_tool *tool,
struct machine *machine, bool mmap_data)
struct machine *machine,
bool mmap_data,
unsigned int proc_map_timeout)
{
char filename[PATH_MAX];
DIR *tasks;
@@ -421,7 +426,8 @@ static int __event__synthesize_thread(union perf_event *comm_event,
return -1;
return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
process, machine, mmap_data);
process, machine, mmap_data,
proc_map_timeout);
}
if (machine__is_default_guest(machine))
@@ -462,7 +468,7 @@ static int __event__synthesize_thread(union perf_event *comm_event,
if (_pid == pid) {
/* process the parent's maps too */
rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
process, machine, mmap_data);
process, machine, mmap_data, proc_map_timeout);
if (rc)
break;
}
@@ -476,7 +482,8 @@ int perf_event__synthesize_thread_map(struct perf_tool *tool,
struct thread_map *threads,
perf_event__handler_t process,
struct machine *machine,
bool mmap_data)
bool mmap_data,
unsigned int proc_map_timeout)
{
union perf_event *comm_event, *mmap_event, *fork_event;
int err = -1, thread, j;
@@ -499,7 +506,7 @@ int perf_event__synthesize_thread_map(struct perf_tool *tool,
fork_event,
threads->map[thread], 0,
process, tool, machine,
mmap_data)) {
mmap_data, proc_map_timeout)) {
err = -1;
break;
}
@@ -525,7 +532,7 @@ int perf_event__synthesize_thread_map(struct perf_tool *tool,
fork_event,
comm_event->comm.pid, 0,
process, tool, machine,
mmap_data)) {
mmap_data, proc_map_timeout)) {
err = -1;
break;
}
@@ -542,7 +549,9 @@ out:
int perf_event__synthesize_threads(struct perf_tool *tool,
perf_event__handler_t process,
struct machine *machine, bool mmap_data)
struct machine *machine,
bool mmap_data,
unsigned int proc_map_timeout)
{
DIR *proc;
char proc_path[PATH_MAX];
@@ -582,7 +591,8 @@ int perf_event__synthesize_threads(struct perf_tool *tool,
* one thread couldn't be synthesized.
*/
__event__synthesize_thread(comm_event, mmap_event, fork_event, pid,
1, process, tool, machine, mmap_data);
1, process, tool, machine, mmap_data,
proc_map_timeout);
}
err = 0;