Commit 3fcb10e4 authored by Mark Drayton's avatar Mark Drayton Committed by Arnaldo Carvalho de Melo
Browse files

perf tools: Allow specifying proc-map-timeout in config file 



The default timeout of 500ms for parsing /proc/<pid>/maps files is too
short for profiling many of our services.

This can be overridden by passing --proc-map-timeout to the relevant
command but it'd be nice to globally increase our default value.

This patch permits setting a different default with the
core.proc-map-timeout config file parameter.

Signed-off-by: default avatarMark Drayton <mbd@fb.com>
Acked-by: default avatarSong Liu <songliubraving@fb.com>
Acked-by: default avatarNamhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20181204203420.1683114-1-mbd@fb.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 65c9fee2

tools/perf/Documentation/perf-config.txt

+6 −0
Original line number Diff line number Diff line
@@ -199,6 +199,12 @@ colors.*:: 
		Colors for headers in the output of a sub-commands (top, report).

		Default values are 'white', 'blue'.



core.*::

	core.proc-map-timeout::

		Sets a timeout (in milliseconds) for parsing /proc/<pid>/maps files.

		Can be overridden by the --proc-map-timeout option on supported

		subcommands. The default timeout is 500ms.



tui.*, gtk.*::

	Subcommands that can be configured here are 'top', 'report' and 'annotate'.

	These values are booleans, for example:

tools/perf/builtin-kvm.c

+2 −4
Original line number Diff line number Diff line
@@ -1364,7 +1364,7 @@ static int kvm_events_live(struct perf_kvm_stat *kvm, 
			"show events other than"

			" HLT (x86 only) or Wait state (s390 only)"

			" that take longer than duration usecs"),

		OPT_UINTEGER(0, "proc-map-timeout", &kvm->opts.proc_map_timeout,

		OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,

				"per thread proc mmap processing timeout in ms"),

		OPT_END()

	};
@@ -1394,7 +1394,6 @@ static int kvm_events_live(struct perf_kvm_stat *kvm, 
	kvm->opts.target.uses_mmap = false;

	kvm->opts.target.uid_str = NULL;

	kvm->opts.target.uid = UINT_MAX;

	kvm->opts.proc_map_timeout = 500;



	symbol__init(NULL);

	disable_buildid_cache();
@@ -1453,8 +1452,7 @@ static int kvm_events_live(struct perf_kvm_stat *kvm, 
	perf_session__set_id_hdr_size(kvm->session);

	ordered_events__set_copy_on_queue(&kvm->session->ordered_events, true);

	machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target,

				    kvm->evlist->threads, false,

				    kvm->opts.proc_map_timeout, 1);

				    kvm->evlist->threads, false, 1);

	err = kvm_live_open_events(kvm);

	if (err)

		goto out;

tools/perf/builtin-record.c

+3 −5
Original line number Diff line number Diff line
@@ -867,8 +867,7 @@ static int record__synthesize_workload(struct record *rec, bool tail) 
	err = perf_event__synthesize_thread_map(&rec->tool, thread_map,

						 process_synthesized_event,

						 &rec->session->machines.host,

						 rec->opts.sample_address,

						 rec->opts.proc_map_timeout);

						 rec->opts.sample_address);

	thread_map__put(thread_map);

	return err;

}
@@ -1085,7 +1084,7 @@ static int record__synthesize(struct record *rec, bool tail) 


	err = __machine__synthesize_threads(machine, tool, &opts->target, rec->evlist->threads,

					    process_synthesized_event, opts->sample_address,

					    opts->proc_map_timeout, 1);

					    1);

out:

	return err;

}
@@ -1783,7 +1782,6 @@ static struct record record = { 
			.uses_mmap   = true,

			.default_per_cpu = true,

		},

		.proc_map_timeout     = 500,

	},

	.tool = {

		.sample		= process_sample_event,
@@ -1913,7 +1911,7 @@ static struct option __record_options[] = { 
	parse_clockid),

	OPT_STRING_OPTARG('S', "snapshot", &record.opts.auxtrace_snapshot_opts,

			  "opts", "AUX area tracing Snapshot Mode", ""),

	OPT_UINTEGER(0, "proc-map-timeout", &record.opts.proc_map_timeout,

	OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,

			"per thread proc mmap processing timeout in ms"),

	OPT_BOOLEAN(0, "namespaces", &record.opts.record_namespaces,

		    "Record namespaces events"),

tools/perf/builtin-top.c

+1 −3
Original line number Diff line number Diff line
@@ -1096,7 +1096,6 @@ static int __cmd_top(struct perf_top *top) 


	machine__synthesize_threads(&top->session->machines.host, &opts->target,

				    top->evlist->threads, false,

				    opts->proc_map_timeout,

				    top->nr_threads_synthesize);



	if (top->nr_threads_synthesize > 1)
@@ -1256,7 +1255,6 @@ int cmd_top(int argc, const char **argv) 
			.target		= {

				.uses_mmap   = true,

			},

			.proc_map_timeout    = 500,

			/*

			 * FIXME: This will lose PERF_RECORD_MMAP and other metadata

			 * when we pause, fix that and reenable. Probably using a
@@ -1369,7 +1367,7 @@ int cmd_top(int argc, const char **argv) 
	OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,

		   "width[,width...]",

		   "don't try to adjust column width, use these fixed values"),

	OPT_UINTEGER(0, "proc-map-timeout", &opts->proc_map_timeout,

	OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,

			"per thread proc mmap processing timeout in ms"),

	OPT_CALLBACK_NOOPT('b', "branch-any", &opts->branch_stack,

		     "branch any", "sample any taken branches",

tools/perf/builtin-trace.c

+2 −3
Original line number Diff line number Diff line
@@ -1264,7 +1264,7 @@ static int trace__symbols_init(struct trace *trace, struct perf_evlist *evlist) 


	err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target,

					    evlist->threads, trace__tool_process, false,

					    trace->opts.proc_map_timeout, 1);

					    1);

out:

	if (err)

		symbol__exit();
@@ -3393,7 +3393,6 @@ int cmd_trace(int argc, const char **argv) 
			.user_interval = ULLONG_MAX,

			.no_buffering  = true,

			.mmap_pages    = UINT_MAX,

			.proc_map_timeout  = 500,

		},

		.output = stderr,

		.show_comm = true,
@@ -3464,7 +3463,7 @@ int cmd_trace(int argc, const char **argv) 
		     "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),

	OPT_BOOLEAN(0, "print-sample", &trace.print_sample,

			"print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"),

	OPT_UINTEGER(0, "proc-map-timeout", &trace.opts.proc_map_timeout,

	OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,

			"per thread proc mmap processing timeout in ms"),

	OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only",

		     trace__parse_cgroups),

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