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author | Daniel Bristot de Oliveira <bristot@kernel.org> | 2022-03-02 22:01:31 +0300 |
---|---|---|
committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2022-03-15 21:36:49 +0300 |
commit | 51d64c3a181938da8fb56404524e15776e9c6bf8 (patch) | |
tree | d221e8c7bd00148d8d505bca50bf4559be5c0401 /tools/tracing/rtla/src/timerlat_hist.c | |
parent | b5aa0be25c27a7f21d9a28f0e0057915552d3c1b (diff) | |
download | linux-51d64c3a181938da8fb56404524e15776e9c6bf8.tar.xz |
rtla: Add -e/--event support
Add -e/--event option. This option enables an event in the trace (-t)
session. The argument can be a specific event, e.g., -e sched:sched_switch,
or all events of a system group, e.g., -e sched. Multiple -e are allowed.
It is only active when -t or -a are set.
This option is available for all current tools.
Link: https://lkml.kernel.org/r/6a3b753be9b1e811953995f7f21a86918ad13390.1646247211.git.bristot@kernel.org
Cc: Daniel Bristot de Oliveira <bristot@kernel.org>
Cc: Clark Williams <williams@redhat.com>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'tools/tracing/rtla/src/timerlat_hist.c')
-rw-r--r-- | tools/tracing/rtla/src/timerlat_hist.c | 33 |
1 files changed, 29 insertions, 4 deletions
diff --git a/tools/tracing/rtla/src/timerlat_hist.c b/tools/tracing/rtla/src/timerlat_hist.c index 9cd97095b04a..2bd668fd36f5 100644 --- a/tools/tracing/rtla/src/timerlat_hist.c +++ b/tools/tracing/rtla/src/timerlat_hist.c @@ -29,6 +29,7 @@ struct timerlat_hist_params { int duration; int set_sched; struct sched_attr sched_param; + struct trace_events *events; char no_irq; char no_thread; @@ -429,8 +430,8 @@ static void timerlat_hist_usage(char *usage) char *msg[] = { "", " usage: [rtla] timerlat hist [-h] [-q] [-d s] [-D] [-n] [-a us] [-p us] [-i us] [-T us] [-s us] \\", - " [-t[=file]] [-c cpu-list] [-P priority] [-E N] [-b N] [--no-irq] [--no-thread] [--no-header] \\", - " [--no-summary] [--no-index] [--with-zeros]", + " [-t[=file]] [-e sys[:event]] [-c cpu-list] [-P priority] [-E N] [-b N] [--no-irq] \\", + " [--no-thread] [--no-header] [--no-summary] [--no-index] [--with-zeros]", "", " -h/--help: print this menu", " -a/--auto: set automatic trace mode, stopping the session if argument in us latency is hit", @@ -441,7 +442,8 @@ static void timerlat_hist_usage(char *usage) " -c/--cpus cpus: run the tracer only on the given cpus", " -d/--duration time[m|h|d]: duration of the session in seconds", " -D/--debug: print debug info", - " -T/--trace[=file]: save the stopped trace to [file|timerlat_trace.txt]", + " -t/--trace[=file]: save the stopped trace to [file|timerlat_trace.txt]", + " -e/--event <sys:event>: enable the <sys:event> in the trace instance, multiple -e are allowed", " -n/--nano: display data in nanoseconds", " -b/--bucket-size N: set the histogram bucket size (default 1)", " -E/--entries N: set the number of entries of the histogram (default 256)", @@ -478,6 +480,7 @@ static struct timerlat_hist_params *timerlat_hist_parse_args(int argc, char *argv[]) { struct timerlat_hist_params *params; + struct trace_events *tevent; int auto_thresh; int retval; int c; @@ -507,6 +510,7 @@ static struct timerlat_hist_params {"stack", required_argument, 0, 's'}, {"thread", required_argument, 0, 'T'}, {"trace", optional_argument, 0, 't'}, + {"event", required_argument, 0, 'e'}, {"no-irq", no_argument, 0, '0'}, {"no-thread", no_argument, 0, '1'}, {"no-header", no_argument, 0, '2'}, @@ -519,7 +523,7 @@ static struct timerlat_hist_params /* getopt_long stores the option index here. */ int option_index = 0; - c = getopt_long(argc, argv, "a:c:b:d:E:Dhi:np:P:s:t::T:012345", + c = getopt_long(argc, argv, "a:c:b:d:e:E:Dhi:np:P:s:t::T:012345", long_options, &option_index); /* detect the end of the options. */ @@ -559,6 +563,18 @@ static struct timerlat_hist_params if (!params->duration) timerlat_hist_usage("Invalid -D duration\n"); break; + case 'e': + tevent = trace_event_alloc(optarg); + if (!tevent) { + err_msg("Error alloc trace event"); + exit(EXIT_FAILURE); + } + + if (params->events) + tevent->next = params->events; + + params->events = tevent; + break; case 'E': params->entries = get_llong_from_str(optarg); if ((params->entries < 10) || (params->entries > 9999999)) @@ -791,6 +807,13 @@ int timerlat_hist_main(int argc, char *argv[]) err_msg("Failed to enable the trace instance\n"); goto out_hist; } + + if (params->events) { + retval = trace_events_enable(&record->trace, params->events); + if (retval) + goto out_hist; + } + trace_instance_start(&record->trace); } @@ -828,6 +851,8 @@ int timerlat_hist_main(int argc, char *argv[]) } out_hist: + trace_events_destroy(&record->trace, params->events); + params->events = NULL; timerlat_free_histogram(tool->data); osnoise_destroy_tool(record); osnoise_destroy_tool(tool); |