diff options
author | Daniel Bristot de Oliveira <bristot@kernel.org> | 2023-02-08 00:48:50 +0300 |
---|---|---|
committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2023-02-14 07:56:46 +0300 |
commit | 1f428356c38dcbe49fd2f1c488b41e88720ead92 (patch) | |
tree | 25b9e16d3b28e677aec8f33015a4e42eb60d6b37 /tools/tracing/rtla/src/osnoise_top.c | |
parent | ce6cc6f70cad4d703ddfe99d74f33990617c0a3c (diff) | |
download | linux-1f428356c38dcbe49fd2f1c488b41e88720ead92.tar.xz |
rtla: Add hwnoise tool
The hwnoise tool is a special mode for the osnoise top tool.
hwnoise dispatches the osnoise tracer and displays a summary of the noise.
The difference is that it runs the tracer with the OSNOISE_IRQ_DISABLE
option set, thus only allowing only hardware-related noise, resulting in
a simplified output. hwnoise has the same features of osnoise.
An example of the tool's output:
# rtla hwnoise -c 1-11 -T 1 -d 10m -q
Hardware-related Noise
duration: 0 00:10:00 | time is in us
CPU Period Runtime Noise % CPU Aval Max Noise Max Single HW NMI
1 #599 599000000 138 99.99997 3 3 4 74
2 #599 599000000 85 99.99998 3 3 4 75
3 #599 599000000 86 99.99998 4 3 6 75
4 #599 599000000 81 99.99998 4 4 2 75
5 #599 599000000 85 99.99998 2 2 2 75
Link: https://lkml.kernel.org/r/2d6f49a6f3a4f8b51b2c806458b1cff71ad4d014.1675805361.git.bristot@kernel.org
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Cc: Daniel Bristot de Oliveira <bristot@kernel.org>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Clark Williams <williams@redhat.com>
Cc: Bagas Sanjaya <bagasdotme@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'tools/tracing/rtla/src/osnoise_top.c')
-rw-r--r-- | tools/tracing/rtla/src/osnoise_top.c | 84 |
1 files changed, 68 insertions, 16 deletions
diff --git a/tools/tracing/rtla/src/osnoise_top.c b/tools/tracing/rtla/src/osnoise_top.c index 76479bfb2922..562f2e4b18c5 100644 --- a/tools/tracing/rtla/src/osnoise_top.c +++ b/tools/tracing/rtla/src/osnoise_top.c @@ -14,6 +14,11 @@ #include "osnoise.h" #include "utils.h" +enum osnoise_mode { + MODE_OSNOISE = 0, + MODE_HWNOISE +}; + /* * osnoise top parameters */ @@ -32,6 +37,7 @@ struct osnoise_top_params { int set_sched; struct sched_attr sched_param; struct trace_events *events; + enum osnoise_mode mode; }; struct osnoise_top_cpu { @@ -143,15 +149,23 @@ osnoise_top_handler(struct trace_seq *s, struct tep_record *record, */ static void osnoise_top_header(struct osnoise_tool *top) { + struct osnoise_top_params *params = top->params; struct trace_seq *s = top->trace.seq; char duration[26]; get_duration(top->start_time, duration, sizeof(duration)); trace_seq_printf(s, "\033[2;37;40m"); - trace_seq_printf(s, " Operating System Noise"); - trace_seq_printf(s, " "); - trace_seq_printf(s, " "); + trace_seq_printf(s, " "); + + if (params->mode == MODE_OSNOISE) { + trace_seq_printf(s, "Operating System Noise"); + trace_seq_printf(s, " "); + } else if (params->mode == MODE_HWNOISE) { + trace_seq_printf(s, "Hardware-related Noise"); + } + + trace_seq_printf(s, " "); trace_seq_printf(s, "\033[0;0;0m"); trace_seq_printf(s, "\n"); @@ -162,7 +176,14 @@ static void osnoise_top_header(struct osnoise_tool *top) trace_seq_printf(s, " Noise "); trace_seq_printf(s, " %% CPU Aval "); trace_seq_printf(s, " Max Noise Max Single "); - trace_seq_printf(s, " HW NMI IRQ Softirq Thread"); + trace_seq_printf(s, " HW NMI"); + + if (params->mode == MODE_HWNOISE) + goto eol; + + trace_seq_printf(s, " IRQ Softirq Thread"); + +eol: trace_seq_printf(s, "\033[0;0;0m"); trace_seq_printf(s, "\n"); } @@ -181,6 +202,7 @@ static void clear_terminal(struct trace_seq *seq) */ static void osnoise_top_print(struct osnoise_tool *tool, int cpu) { + struct osnoise_top_params *params = tool->params; struct trace_seq *s = tool->trace.seq; struct osnoise_top_cpu *cpu_data; struct osnoise_top_data *data; @@ -205,6 +227,12 @@ static void osnoise_top_print(struct osnoise_tool *tool, int cpu) trace_seq_printf(s, "%12llu ", cpu_data->hw_count); trace_seq_printf(s, "%12llu ", cpu_data->nmi_count); + + if (params->mode == MODE_HWNOISE) { + trace_seq_printf(s, "\n"); + return; + } + trace_seq_printf(s, "%12llu ", cpu_data->irq_count); trace_seq_printf(s, "%12llu ", cpu_data->softirq_count); trace_seq_printf(s, "%12llu\n", cpu_data->thread_count); @@ -241,12 +269,12 @@ osnoise_print_stats(struct osnoise_top_params *params, struct osnoise_tool *top) /* * osnoise_top_usage - prints osnoise top usage message */ -void osnoise_top_usage(char *usage) +static void osnoise_top_usage(struct osnoise_top_params *params, char *usage) { int i; static const char * const msg[] = { - " usage: rtla osnoise [top] [-h] [-q] [-D] [-d s] [-a us] [-p us] [-r us] [-s us] [-S us] \\", + " [-h] [-q] [-D] [-d s] [-a us] [-p us] [-r us] [-s us] [-S us] \\", " [-T us] [-t[=file]] [-e sys[:event]] [--filter <filter>] [--trigger <trigger>] \\", " [-c cpu-list] [-P priority]", "", @@ -277,9 +305,22 @@ void osnoise_top_usage(char *usage) if (usage) fprintf(stderr, "%s\n", usage); - fprintf(stderr, "rtla osnoise top: a per-cpu summary of the OS noise (version %s)\n", + if (params->mode == MODE_OSNOISE) { + fprintf(stderr, + "rtla osnoise top: a per-cpu summary of the OS noise (version %s)\n", VERSION); + fprintf(stderr, " usage: rtla osnoise [top]"); + } + + if (params->mode == MODE_HWNOISE) { + fprintf(stderr, + "rtla hwnoise: a summary of hardware-related noise (version %s)\n", + VERSION); + + fprintf(stderr, " usage: rtla hwnoise"); + } + for (i = 0; msg[i]; i++) fprintf(stderr, "%s\n", msg[i]); exit(1); @@ -299,6 +340,9 @@ struct osnoise_top_params *osnoise_top_parse_args(int argc, char **argv) if (!params) exit(1); + if (strcmp(argv[0], "hwnoise") == 0) + params->mode = MODE_HWNOISE; + while (1) { static struct option long_options[] = { {"auto", required_argument, 0, 'a'}, @@ -345,7 +389,7 @@ struct osnoise_top_params *osnoise_top_parse_args(int argc, char **argv) case 'c': retval = parse_cpu_list(optarg, ¶ms->monitored_cpus); if (retval) - osnoise_top_usage("\nInvalid -c cpu list\n"); + osnoise_top_usage(params, "\nInvalid -c cpu list\n"); params->cpus = optarg; break; case 'D': @@ -354,7 +398,7 @@ struct osnoise_top_params *osnoise_top_parse_args(int argc, char **argv) case 'd': params->duration = parse_seconds_duration(optarg); if (!params->duration) - osnoise_top_usage("Invalid -D duration\n"); + osnoise_top_usage(params, "Invalid -D duration\n"); break; case 'e': tevent = trace_event_alloc(optarg); @@ -370,17 +414,17 @@ struct osnoise_top_params *osnoise_top_parse_args(int argc, char **argv) break; case 'h': case '?': - osnoise_top_usage(NULL); + osnoise_top_usage(params, NULL); break; case 'p': params->period = get_llong_from_str(optarg); if (params->period > 10000000) - osnoise_top_usage("Period longer than 10 s\n"); + osnoise_top_usage(params, "Period longer than 10 s\n"); break; case 'P': retval = parse_prio(optarg, ¶ms->sched_param); if (retval == -1) - osnoise_top_usage("Invalid -P priority"); + osnoise_top_usage(params, "Invalid -P priority"); params->set_sched = 1; break; case 'q': @@ -389,7 +433,7 @@ struct osnoise_top_params *osnoise_top_parse_args(int argc, char **argv) case 'r': params->runtime = get_llong_from_str(optarg); if (params->runtime < 100) - osnoise_top_usage("Runtime shorter than 100 us\n"); + osnoise_top_usage(params, "Runtime shorter than 100 us\n"); break; case 's': params->stop_us = get_llong_from_str(optarg); @@ -415,7 +459,7 @@ struct osnoise_top_params *osnoise_top_parse_args(int argc, char **argv) exit(EXIT_FAILURE); } } else { - osnoise_top_usage("--trigger requires a previous -e\n"); + osnoise_top_usage(params, "--trigger requires a previous -e\n"); } break; case '1': /* filter */ @@ -426,11 +470,11 @@ struct osnoise_top_params *osnoise_top_parse_args(int argc, char **argv) exit(EXIT_FAILURE); } } else { - osnoise_top_usage("--filter requires a previous -e\n"); + osnoise_top_usage(params, "--filter requires a previous -e\n"); } break; default: - osnoise_top_usage("Invalid option"); + osnoise_top_usage(params, "Invalid option"); } } @@ -495,6 +539,14 @@ osnoise_top_apply_config(struct osnoise_tool *tool, struct osnoise_top_params *p } } + if (params->mode == MODE_HWNOISE) { + retval = osnoise_set_irq_disable(tool->context, 1); + if (retval) { + err_msg("Failed to set OSNOISE_IRQ_DISABLE option\n"); + goto out_err; + } + } + return 0; out_err: |