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perf tools: Introduce per user view

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The new --uid command line option will show only the tasks for a given
user, using the proc interface to figure out the existing tasks.

Kernel work is needed to close races at startup, but this should already
be useful in many use cases.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-bdnspm000gw2l984a2t53o8z@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo
2012-01-19 14:08:15 -02:00
parent 9ae7d3351a
commit 0d37aa34f8
18 changed files with 200 additions and 22 deletions
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12
tools/perf/builtin-record.c
View File

@@ -44,6 +44,7 @@ struct perf_record {
struct perf_evlist *evlist;
struct perf_session *session;
const char *progname;
const char *uid_str;
int output;
unsigned int page_size;
int realtime_prio;
@@ -727,6 +728,7 @@ const struct option record_options[] = {
OPT_CALLBACK('G', "cgroup", &record.evlist, "name",
"monitor event in cgroup name only",
parse_cgroups),
OPT_STRING('u', "uid", &record.uid_str, "user", "user to profile"),
OPT_END()
};
@@ -748,7 +750,7 @@ int cmd_record(int argc, const char **argv, const char *prefix __used)
argc = parse_options(argc, argv, record_options, record_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
if (!argc && rec->opts.target_pid == -1 && rec->opts.target_tid == -1 &&
!rec->opts.system_wide && !rec->opts.cpu_list)
!rec->opts.system_wide && !rec->opts.cpu_list && !rec->uid_str)
usage_with_options(record_usage, record_options);
if (rec->force && rec->append_file) {
@@ -788,11 +790,17 @@ int cmd_record(int argc, const char **argv, const char *prefix __used)
goto out_symbol_exit;
}
rec->opts.uid = parse_target_uid(rec->uid_str, rec->opts.target_tid,
rec->opts.target_pid);
if (rec->uid_str != NULL && rec->opts.uid == UINT_MAX - 1)
goto out_free_fd;
if (rec->opts.target_pid != -1)
rec->opts.target_tid = rec->opts.target_pid;
if (perf_evlist__create_maps(evsel_list, rec->opts.target_pid,
rec->opts.target_tid, rec->opts.cpu_list) < 0)
rec->opts.target_tid, rec->opts.uid,
rec->opts.cpu_list) < 0)
usage_with_options(record_usage, record_options);
list_for_each_entry(pos, &evsel_list->entries, node) {