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Message-ID: <20220315190242.994222859@goodmis.org>
Date: Tue, 15 Mar 2022 15:02:16 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: linux-kernel@...r.kernel.org
Cc: Ingo Molnar <mingo@...nel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Daniel Bristot de Oliveira <bristot@...nel.org>,
Clark Williams <williams@...hat.com>,
Juri Lelli <juri.lelli@...hat.com>,
Jonathan Corbet <corbet@....net>
Subject: [for-next][PATCH 02/15] rtla/osnoise: Add an option to set the threshold
From: Daniel Bristot de Oliveira <bristot@...nel.org>
Add the -T/--threshold option to set the minimum threshold to be
considered a noise to osnoise top and hist commands. Also update
the man pages.
Link: https://lkml.kernel.org/r/031861200ffdb24a1df4aa72c458706889a20d5d.1646247211.git.bristot@kernel.org
Cc: Daniel Bristot de Oliveira <bristot@...nel.org>
Cc: Clark Williams <williams@...hat.com>
Cc: Juri Lelli <juri.lelli@...hat.com>
Cc: Jonathan Corbet <corbet@....net>
Signed-off-by: Daniel Bristot de Oliveira <bristot@...nel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org>
---
.../tools/rtla/common_osnoise_options.rst | 5 +++++
tools/tracing/rtla/src/osnoise_hist.c | 22 +++++++++++++++----
tools/tracing/rtla/src/osnoise_top.c | 20 ++++++++++++++---
3 files changed, 40 insertions(+), 7 deletions(-)
diff --git a/Documentation/tools/rtla/common_osnoise_options.rst b/Documentation/tools/rtla/common_osnoise_options.rst
index d556883e4e26..27f1493f7bc0 100644
--- a/Documentation/tools/rtla/common_osnoise_options.rst
+++ b/Documentation/tools/rtla/common_osnoise_options.rst
@@ -15,3 +15,8 @@
Stop the trace if the total sample is higher than the argument in microseconds.
If **-T** is set, it will also save the trace to the output.
+
+**-T**, **--threshold** *us*
+
+ Specify the minimum delta between two time reads to be considered noise.
+ The default threshold is *5 us*.
diff --git a/tools/tracing/rtla/src/osnoise_hist.c b/tools/tracing/rtla/src/osnoise_hist.c
index 52c053cc1789..ab02219de528 100644
--- a/tools/tracing/rtla/src/osnoise_hist.c
+++ b/tools/tracing/rtla/src/osnoise_hist.c
@@ -21,6 +21,7 @@ struct osnoise_hist_params {
char *trace_output;
unsigned long long runtime;
unsigned long long period;
+ long long threshold;
long long stop_us;
long long stop_total_us;
int sleep_time;
@@ -425,15 +426,16 @@ static void osnoise_hist_usage(char *usage)
static const char * const msg[] = {
"",
- " usage: rtla osnoise hist [-h] [-D] [-d s] [-p us] [-r us] [-s us] [-S us] [-t[=file]] \\",
- " [-c cpu-list] [-P priority] [-b N] [-E N] [--no-header] [--no-summary] \\",
- " [--no-index] [--with-zeros]",
+ " usage: rtla osnoise hist [-h] [-D] [-d s] [-p us] [-r us] [-s us] [-S us] [-T us] \\",
+ " [-t[=file]] [-c cpu-list] [-P priority] [-b N] [-E N] [--no-header] \\",
+ " [--no-summary] [--no-index] [--with-zeros]",
"",
" -h/--help: print this menu",
" -p/--period us: osnoise period in us",
" -r/--runtime us: osnoise runtime in us",
" -s/--stop us: stop trace if a single sample is higher than the argument in us",
" -S/--stop-total us: stop trace if the total sample is higher than the argument in us",
+ " -T/--threshold us: the minimum delta to be considered a noise",
" -c/--cpus cpu-list: list of cpus to run osnoise threads",
" -d/--duration time[s|m|h|d]: duration of the session",
" -D/--debug: print debug info",
@@ -497,6 +499,7 @@ static struct osnoise_hist_params
{"stop", required_argument, 0, 's'},
{"stop-total", required_argument, 0, 'S'},
{"trace", optional_argument, 0, 't'},
+ {"threshold", required_argument, 0, 'T'},
{"no-header", no_argument, 0, '0'},
{"no-summary", no_argument, 0, '1'},
{"no-index", no_argument, 0, '2'},
@@ -507,7 +510,7 @@ static struct osnoise_hist_params
/* getopt_long stores the option index here. */
int option_index = 0;
- c = getopt_long(argc, argv, "c:b:d:E:Dhp:P:r:s:S:t::0123",
+ c = getopt_long(argc, argv, "c:b:d:E:Dhp:P:r:s:S:t::T:0123",
long_options, &option_index);
/* detect the end of the options. */
@@ -565,6 +568,9 @@ static struct osnoise_hist_params
case 'S':
params->stop_total_us = get_llong_from_str(optarg);
break;
+ case 'T':
+ params->threshold = get_llong_from_str(optarg);
+ break;
case 't':
if (optarg)
/* skip = */
@@ -645,6 +651,14 @@ osnoise_hist_apply_config(struct osnoise_tool *tool, struct osnoise_hist_params
}
}
+ if (params->threshold) {
+ retval = osnoise_set_tracing_thresh(tool->context, params->threshold);
+ if (retval) {
+ err_msg("Failed to set tracing_thresh\n");
+ goto out_err;
+ }
+ }
+
return 0;
out_err:
diff --git a/tools/tracing/rtla/src/osnoise_top.c b/tools/tracing/rtla/src/osnoise_top.c
index 7af769b9c0de..07fb1b8314d3 100644
--- a/tools/tracing/rtla/src/osnoise_top.c
+++ b/tools/tracing/rtla/src/osnoise_top.c
@@ -23,6 +23,7 @@ struct osnoise_top_params {
char *trace_output;
unsigned long long runtime;
unsigned long long period;
+ long long threshold;
long long stop_us;
long long stop_total_us;
int sleep_time;
@@ -244,14 +245,15 @@ void osnoise_top_usage(char *usage)
int i;
static const char * const msg[] = {
- " usage: rtla osnoise [top] [-h] [-q] [-D] [-d s] [-p us] [-r us] [-s us] [-S us] [-t[=file]] \\",
- " [-c cpu-list] [-P priority]",
+ " usage: rtla osnoise [top] [-h] [-q] [-D] [-d s] [-p us] [-r us] [-s us] [-S us] [-T us] \\",
+ " [-t[=file]] [-c cpu-list] [-P priority]",
"",
" -h/--help: print this menu",
" -p/--period us: osnoise period in us",
" -r/--runtime us: osnoise runtime in us",
" -s/--stop us: stop trace if a single sample is higher than the argument in us",
" -S/--stop-total us: stop trace if the total sample is higher than the argument in us",
+ " -T/--threshold us: the minimum delta to be considered a noise",
" -c/--cpus cpu-list: list of cpus to run osnoise threads",
" -d/--duration time[s|m|h|d]: duration of the session",
" -D/--debug: print debug info",
@@ -302,6 +304,7 @@ struct osnoise_top_params *osnoise_top_parse_args(int argc, char **argv)
{"runtime", required_argument, 0, 'r'},
{"stop", required_argument, 0, 's'},
{"stop-total", required_argument, 0, 'S'},
+ {"threshold", required_argument, 0, 'T'},
{"trace", optional_argument, 0, 't'},
{0, 0, 0, 0}
};
@@ -309,7 +312,7 @@ struct osnoise_top_params *osnoise_top_parse_args(int argc, char **argv)
/* getopt_long stores the option index here. */
int option_index = 0;
- c = getopt_long(argc, argv, "c:d:Dhp:P:qr:s:S:t::",
+ c = getopt_long(argc, argv, "c:d:Dhp:P:qr:s:S:t::T:",
long_options, &option_index);
/* Detect the end of the options. */
@@ -367,6 +370,9 @@ struct osnoise_top_params *osnoise_top_parse_args(int argc, char **argv)
else
params->trace_output = "osnoise_trace.txt";
break;
+ case 'T':
+ params->threshold = get_llong_from_str(optarg);
+ break;
default:
osnoise_top_usage("Invalid option");
}
@@ -425,6 +431,14 @@ osnoise_top_apply_config(struct osnoise_tool *tool, struct osnoise_top_params *p
}
}
+ if (params->threshold) {
+ retval = osnoise_set_tracing_thresh(tool->context, params->threshold);
+ if (retval) {
+ err_msg("Failed to set tracing_thresh\n");
+ goto out_err;
+ }
+ }
+
return 0;
out_err:
--
2.35.1
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