From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932403AbbFQPK6 (ORCPT ); Wed, 17 Jun 2015 11:10:58 -0400 Received: from mga01.intel.com ([192.55.52.88]:44259 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756899AbbFQPKq (ORCPT ); Wed, 17 Jun 2015 11:10:46 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.13,633,1427785200"; d="scan'208";a="729268971" From: kan.liang@intel.com To: acme@kernel.org Cc: linux-kernel@vger.kernel.org, dsahern@gmail.com, ying.huang@intel.com, andi@firstfloor.org, Kan Liang Subject: [PATCH V3 2/2] perf,tools: configurable per thread proc map processing time out Date: Wed, 17 Jun 2015 03:56:52 -0400 Message-Id: <1434527812-17051-2-git-send-email-kan.liang@intel.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1434527812-17051-1-git-send-email-kan.liang@intel.com> References: <1434527812-17051-1-git-send-email-kan.liang@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Kan Liang The time out to limit the individual proc map processing was hard code to 50ms. This patch introduce a new option --proc-map-timeout to make the time limit configurable. Signed-off-by: Kan Liang --- tools/perf/Documentation/perf-kvm.txt | 6 ++++++ tools/perf/Documentation/perf-record.txt | 5 +++++ tools/perf/Documentation/perf-top.txt | 6 ++++++ tools/perf/Documentation/perf-trace.txt | 5 +++++ tools/perf/builtin-kvm.c | 5 ++++- tools/perf/builtin-record.c | 6 +++++- tools/perf/builtin-top.c | 5 ++++- tools/perf/builtin-trace.c | 6 +++++- tools/perf/perf.h | 1 + tools/perf/tests/code-reading.c | 2 +- tools/perf/tests/dwarf-unwind.c | 2 +- tools/perf/tests/mmap-thread-lookup.c | 4 ++-- tools/perf/util/event.c | 30 ++++++++++++++++++------------ tools/perf/util/event.h | 9 ++++++--- tools/perf/util/machine.c | 7 ++++--- tools/perf/util/machine.h | 9 ++++++--- 16 files changed, 79 insertions(+), 29 deletions(-) diff --git a/tools/perf/Documentation/perf-kvm.txt b/tools/perf/Documentation/perf-kvm.txt index 6252e77..ba4068a 100644 --- a/tools/perf/Documentation/perf-kvm.txt +++ b/tools/perf/Documentation/perf-kvm.txt @@ -151,6 +151,12 @@ STAT LIVE OPTIONS Show events other than HLT (x86 only) or Wait state (s390 only) that take longer than duration usecs. +--proc-map-timeout:: + When processing pre-existing threads /proc/XXX/mmap, it may take + a long time, because the file may be huge. A time out is needed + in such cases. + This option sets the time out limit. The default value is 50 ms. + SEE ALSO -------- linkperf:perf-top[1], linkperf:perf-record[1], linkperf:perf-report[1], diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index 280533e..9a08ceb 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -267,6 +267,11 @@ AUX area tracing event. Optionally the number of bytes to capture per snapshot can be specified. In Snapshot Mode, trace data is captured only when signal SIGUSR2 is received. +--proc-map-timeout:: +When processing pre-existing threads /proc/XXX/mmap, it may take a long time, +because the file may be huge. A time out is needed in such cases. +This option sets the time out limit. The default value is 50 ms. + SEE ALSO -------- linkperf:perf-stat[1], linkperf:perf-list[1] diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt index 9e5b07eb..6d88ba4 100644 --- a/tools/perf/Documentation/perf-top.txt +++ b/tools/perf/Documentation/perf-top.txt @@ -201,6 +201,12 @@ Default is to monitor all CPUS. Force each column width to the provided list, for large terminal readability. 0 means no limit (default behavior). +--proc-map-timeout:: + When processing pre-existing threads /proc/XXX/mmap, it may take + a long time, because the file may be huge. A time out is needed + in such cases. + This option sets the time out limit. The default value is 50 ms. + INTERACTIVE PROMPTING KEYS -------------------------- diff --git a/tools/perf/Documentation/perf-trace.txt b/tools/perf/Documentation/perf-trace.txt index 1db9c8b..9349098 100644 --- a/tools/perf/Documentation/perf-trace.txt +++ b/tools/perf/Documentation/perf-trace.txt @@ -121,6 +121,11 @@ the thread executes on the designated CPUs. Default is to monitor all CPUs. --event:: Trace other events, see 'perf list' for a complete list. +--proc-map-timeout:: + When processing pre-existing threads /proc/XXX/mmap, it may take a long time, + because the file may be huge. A time out is needed in such cases. + This option sets the time out limit. The default value is 50 ms. + PAGEFAULTS ---------- diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c index 15fecd3..8dcc953 100644 --- a/tools/perf/builtin-kvm.c +++ b/tools/perf/builtin-kvm.c @@ -1311,6 +1311,8 @@ 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.mmap_timeout, + "per thread proc mmap processing timeout in ms"), OPT_END() }; const char * const live_usage[] = { @@ -1338,6 +1340,7 @@ 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.mmap_timeout = 50; symbol__init(NULL); disable_buildid_cache(); @@ -1393,7 +1396,7 @@ 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->evlist->threads, false, kvm->opts.mmap_timeout); err = kvm_live_open_events(kvm); if (err) goto out; diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index d3731cc..6bc0836 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -598,7 +598,8 @@ static int __cmd_record(struct record *rec, int argc, const char **argv) } err = __machine__synthesize_threads(machine, tool, &opts->target, rec->evlist->threads, - process_synthesized_event, opts->sample_address); + process_synthesized_event, opts->sample_address, + opts->mmap_timeout); if (err != 0) goto out_child; @@ -959,6 +960,7 @@ static struct record record = { .uses_mmap = true, .default_per_cpu = true, }, + .mmap_timeout = 50, }, .tool = { .sample = process_sample_event, @@ -1067,6 +1069,8 @@ 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.mmap_timeout, + "per thread proc mmap processing timeout in ms"), OPT_END() }; diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 6b98742..a2a2a4b 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -951,7 +951,7 @@ static int __cmd_top(struct perf_top *top) goto out_delete; machine__synthesize_threads(&top->session->machines.host, &opts->target, - top->evlist->threads, false); + top->evlist->threads, false, opts->mmap_timeout); ret = perf_top__start_counters(top); if (ret) goto out_delete; @@ -1061,6 +1061,7 @@ int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused) .target = { .uses_mmap = true, }, + .mmap_timeout = 50, }, .max_stack = PERF_MAX_STACK_DEPTH, .sym_pcnt_filter = 5, @@ -1160,6 +1161,8 @@ int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused) 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->mmap_timeout, + "per thread proc mmap processing timeout in ms"), OPT_END() }; const char * const top_usage[] = { diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index a05490d..82044a7 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -1460,7 +1460,8 @@ static int trace__symbols_init(struct trace *trace, struct perf_evlist *evlist) return -ENOMEM; err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target, - evlist->threads, trace__tool_process, false); + evlist->threads, trace__tool_process, false, + trace->opts.mmap_timeout); if (err) symbol__exit(); @@ -2689,6 +2690,7 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused) .user_interval = ULLONG_MAX, .no_buffering = true, .mmap_pages = UINT_MAX, + .mmap_timeout = 50, }, .output = stdout, .show_comm = true, @@ -2738,6 +2740,8 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused) "Trace pagefaults", parse_pagefaults, "maj"), OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"), OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"), + OPT_UINTEGER(0, "proc-map-timeout", &trace.opts.mmap_timeout, + "per thread proc mmap processing timeout in ms"), OPT_END() }; const char * const trace_subcommands[] = { "record", NULL }; diff --git a/tools/perf/perf.h b/tools/perf/perf.h index aa79fb8..3513772 100644 --- a/tools/perf/perf.h +++ b/tools/perf/perf.h @@ -69,6 +69,7 @@ struct record_opts { unsigned initial_delay; bool use_clockid; clockid_t clockid; + unsigned int mmap_timeout; }; struct option; diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-reading.c index e2a432b..45344f7 100644 --- a/tools/perf/tests/code-reading.c +++ b/tools/perf/tests/code-reading.c @@ -451,7 +451,7 @@ static int do_test_code_reading(bool try_kcore) } ret = perf_event__synthesize_thread_map(NULL, threads, - perf_event__process, machine, false); + perf_event__process, machine, false, 50); if (ret < 0) { pr_debug("perf_event__synthesize_thread_map failed\n"); goto out_err; diff --git a/tools/perf/tests/dwarf-unwind.c b/tools/perf/tests/dwarf-unwind.c index 9b748e1..3906ae7 100644 --- a/tools/perf/tests/dwarf-unwind.c +++ b/tools/perf/tests/dwarf-unwind.c @@ -28,7 +28,7 @@ static int init_live_machine(struct machine *machine) pid_t pid = getpid(); return perf_event__synthesize_mmap_events(NULL, &event, pid, pid, - mmap_handler, machine, true); + mmap_handler, machine, true, 50); } #define MAX_STACK 8 diff --git a/tools/perf/tests/mmap-thread-lookup.c b/tools/perf/tests/mmap-thread-lookup.c index 264e215..3fd493e 100644 --- a/tools/perf/tests/mmap-thread-lookup.c +++ b/tools/perf/tests/mmap-thread-lookup.c @@ -129,7 +129,7 @@ static int synth_all(struct machine *machine) { return perf_event__synthesize_threads(NULL, perf_event__process, - machine, 0); + machine, 0, 50); } static int synth_process(struct machine *machine) @@ -141,7 +141,7 @@ static int synth_process(struct machine *machine) err = perf_event__synthesize_thread_map(NULL, map, perf_event__process, - machine, 0); + machine, 0, 50); thread_map__delete(map); return err; diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c index ac6cf2a..10af4aa 100644 --- a/tools/perf/util/event.c +++ b/tools/perf/util/event.c @@ -213,14 +213,13 @@ static int perf_event__synthesize_fork(struct perf_tool *tool, return 0; } -#define MMAP_TIMEOUT (50 * 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 mmap_timeout) { char filename[PATH_MAX]; FILE *fp; @@ -258,7 +257,7 @@ int perf_event__synthesize_mmap_events(struct perf_tool *tool, if (fgets(bf, sizeof(bf), fp) == NULL) break; - if ((rdclock() - t) > MMAP_TIMEOUT) { + if ((rdclock() - t) > (mmap_timeout * 1000000ULL)) { pr_warning("Reading %s time out.\n", filename); timeout = true; goto out; @@ -404,7 +403,9 @@ 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 mmap_timeout) { char filename[PATH_MAX]; DIR *tasks; @@ -421,7 +422,8 @@ 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, + mmap_timeout); } if (machine__is_default_guest(machine)) @@ -462,7 +464,7 @@ 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, mmap_timeout); if (rc) break; } @@ -476,7 +478,8 @@ 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 mmap_timeout) { union perf_event *comm_event, *mmap_event, *fork_event; int err = -1, thread, j; @@ -499,7 +502,7 @@ int perf_event__synthesize_thread_map(struct perf_tool *tool, fork_event, threads->map[thread], 0, process, tool, machine, - mmap_data)) { + mmap_data, mmap_timeout)) { err = -1; break; } @@ -525,7 +528,7 @@ int perf_event__synthesize_thread_map(struct perf_tool *tool, fork_event, comm_event->comm.pid, 0, process, tool, machine, - mmap_data)) { + mmap_data, mmap_timeout)) { err = -1; break; } @@ -542,7 +545,9 @@ 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 mmap_timeout) { DIR *proc; char proc_path[PATH_MAX]; @@ -582,7 +587,8 @@ 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, + mmap_timeout); } err = 0; diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h index 39868f5..b674730 100644 --- a/tools/perf/util/event.h +++ b/tools/perf/util/event.h @@ -384,10 +384,12 @@ typedef int (*perf_event__handler_t)(struct perf_tool *tool, 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); + struct machine *machine, bool mmap_data, + unsigned int mmap_timeout); 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 mmap_timeout); int perf_event__synthesize_kernel_mmap(struct perf_tool *tool, perf_event__handler_t process, struct machine *machine); @@ -469,7 +471,8 @@ int perf_event__synthesize_mmap_events(struct perf_tool *tool, pid_t pid, pid_t tgid, perf_event__handler_t process, struct machine *machine, - bool mmap_data); + bool mmap_data, + unsigned int mmap_timeout); size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp); size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp); diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c index 132e357..430dc6e 100644 --- a/tools/perf/util/machine.c +++ b/tools/perf/util/machine.c @@ -1892,12 +1892,13 @@ int machine__for_each_thread(struct machine *machine, int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool, struct target *target, struct thread_map *threads, - perf_event__handler_t process, bool data_mmap) + perf_event__handler_t process, bool data_mmap, + unsigned int mmap_timeout) { if (target__has_task(target)) - return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap); + return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap, mmap_timeout); else if (target__has_cpu(target)) - return perf_event__synthesize_threads(tool, process, machine, data_mmap); + return perf_event__synthesize_threads(tool, process, machine, data_mmap, mmap_timeout); /* command specified */ return 0; } diff --git a/tools/perf/util/machine.h b/tools/perf/util/machine.h index ca267c4..1e9b84e 100644 --- a/tools/perf/util/machine.h +++ b/tools/perf/util/machine.h @@ -219,13 +219,16 @@ int machine__for_each_thread(struct machine *machine, int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool, struct target *target, struct thread_map *threads, - perf_event__handler_t process, bool data_mmap); + perf_event__handler_t process, bool data_mmap, + unsigned int mmap_timeout); static inline int machine__synthesize_threads(struct machine *machine, struct target *target, - struct thread_map *threads, bool data_mmap) + struct thread_map *threads, bool data_mmap, + unsigned int mmap_timeout) { return __machine__synthesize_threads(machine, NULL, target, threads, - perf_event__process, data_mmap); + perf_event__process, data_mmap, + mmap_timeout); } pid_t machine__get_current_tid(struct machine *machine, int cpu); -- 1.8.3.1