diff options
| author | Daniel Bristot de Oliveira <bristot@kernel.org> | 2024-05-16 16:15:22 +0200 |
|---|---|---|
| committer | Daniel Bristot de Oliveira <bristot@kernel.org> | 2024-05-16 16:44:34 +0200 |
| commit | e9a4062e1527238c5649d0f4be794a8566fd77c9 (patch) | |
| tree | 9e9ed8c235323861f76d5f12def7e14729c55f7d /tools/tracing/rtla/src/osnoise_top.c | |
| parent | fb9e90a67ee9a42779a8ea296a4cf7734258b27d (diff) | |
rtla: Add --trace-buffer-size option
Add the option allow the users to set a different buffer size for the
trace. For example, in large systems, the user might be interested on
reducing the trace buffer to avoid large tracing files.
The buffer size is specified in kB, and it is only affecting
the tracing instance.
The function trace_set_buffer_size() appears on libtracefs v1.6,
so increase the minimum required version on Makefile.config.
Link: https://lkml.kernel.org/r/e7c9ca5b3865f28e131a49ec3b984fadf2d056c6.1715860611.git.bristot@kernel.org
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Diffstat (limited to 'tools/tracing/rtla/src/osnoise_top.c')
| -rw-r--r-- | tools/tracing/rtla/src/osnoise_top.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/tools/tracing/rtla/src/osnoise_top.c b/tools/tracing/rtla/src/osnoise_top.c index 53a074c1222e..7e5aab22727d 100644 --- a/tools/tracing/rtla/src/osnoise_top.c +++ b/tools/tracing/rtla/src/osnoise_top.c @@ -41,6 +41,7 @@ struct osnoise_top_params { int cgroup; int hk_cpus; int warmup; + int buffer_size; cpu_set_t hk_cpu_set; struct sched_attr sched_param; struct trace_events *events; @@ -309,6 +310,7 @@ static void osnoise_top_usage(struct osnoise_top_params *params, char *usage) " d:runtime[us|ms|s]:period[us|ms|s] - use SCHED_DEADLINE with runtime and period", " in nanoseconds", " --warm-up s: let the workload run for s seconds before collecting data", + " --trace-buffer-size kB: set the per-cpu trace buffer size in kB", NULL, }; @@ -384,13 +386,14 @@ struct osnoise_top_params *osnoise_top_parse_args(int argc, char **argv) {"trigger", required_argument, 0, '0'}, {"filter", required_argument, 0, '1'}, {"warm-up", required_argument, 0, '2'}, + {"trace-buffer-size", required_argument, 0, '3'}, {0, 0, 0, 0} }; /* getopt_long stores the option index here. */ int option_index = 0; - c = getopt_long(argc, argv, "a:c:C::d:De:hH:p:P:qr:s:S:t::T:0:1:2:", + c = getopt_long(argc, argv, "a:c:C::d:De:hH:p:P:qr:s:S:t::T:0:1:2:3:", long_options, &option_index); /* Detect the end of the options. */ @@ -517,6 +520,9 @@ struct osnoise_top_params *osnoise_top_parse_args(int argc, char **argv) case '2': params->warmup = get_llong_from_str(optarg); break; + case '3': + params->buffer_size = get_llong_from_str(optarg); + break; default: osnoise_top_usage(params, "Invalid option"); } @@ -725,6 +731,12 @@ int osnoise_top_main(int argc, char **argv) if (retval) goto out_top; } + + if (params->buffer_size > 0) { + retval = trace_set_buffer_size(&record->trace, params->buffer_size); + if (retval) + goto out_top; + } } /* |