Adding --block option to allow record command set block bool in struct perf_event_attr for event, like:
# perf record -e raw_syscalls:sys_enter --block ls # perf record -e raw_syscalls:sys_enter --block -p ... It's allowed only for syscall tracepoint events attached to process. Link: http://lkml.kernel.org/n/tip-ocz7zwwkkx11v0mkxrtcd...@git.kernel.org Signed-off-by: Jiri Olsa <jo...@kernel.org> --- tools/perf/builtin-record.c | 9 +++++++++ tools/perf/perf.h | 1 + tools/perf/util/evsel.c | 3 +++ 3 files changed, 13 insertions(+) diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 4736dc96c4ca..79c8d2f94f86 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -1937,6 +1937,8 @@ static struct option __record_options[] = { "append timestamp to output filename"), OPT_BOOLEAN(0, "timestamp-boundary", &record.timestamp_boundary, "Record timestamp boundary (time of first/last samples)"), + OPT_BOOLEAN(0, "block", &record.opts.block, + "Request blocked tracing (for syscall tracepoints)"), OPT_STRING_OPTARG_SET(0, "switch-output", &record.switch_output.str, &record.switch_output.set, "signal,size,time", "Switch output when receive SIGUSR2 or cross size,time threshold", @@ -2116,6 +2118,13 @@ int cmd_record(int argc, const char **argv) goto out; } + if (rec->opts.block && + !target__has_task(&rec->opts.target) && + !target__none(&rec->opts.target)) { + pr_err("Can't use --block on non task targets\n"); + goto out; + } + /* Enable ignoring missing threads when -u/-p option is defined. */ rec->opts.ignore_missing_thread = rec->opts.target.uid != UINT_MAX || rec->opts.target.pid; diff --git a/tools/perf/perf.h b/tools/perf/perf.h index 4d40baa45a5f..7884701247b8 100644 --- a/tools/perf/perf.h +++ b/tools/perf/perf.h @@ -66,6 +66,7 @@ struct record_opts { bool ignore_missing_thread; bool strict_freq; bool sample_id; + bool block; unsigned int freq; unsigned int mmap_pages; unsigned int auxtrace_mmap_pages; diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index dbc0466db368..e4943e8f811b 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -1045,6 +1045,9 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts, if (opts->sample_transaction) perf_evsel__set_sample_bit(evsel, TRANSACTION); + if (opts->block) + attr->block = true; + if (opts->running_time) { evsel->attr.read_format |= PERF_FORMAT_TOTAL_TIME_ENABLED | -- 2.17.2
