[for-next][PATCH 03/11] rtla: Change monitored_cpus from char * to cpu_set_t

Steven Rostedt
2023-06-13T22:09:13Z

Use a cpumask instead of a char *, reducing memory footprint and code.

No functional change, and in preparation for auto house-keeping.

Link: https://lkml.kernel.org/r/54c46293261d13cb1042d0314486539eeb45fe5d.1686066600.git.bristot@kernel.org

Cc: William White <chwhite@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Tested-by: Juri Lelli <juri.lelli@redhat.com>
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
tools/tracing/rtla/src/osnoise_hist.c | 18 ++++----
tools/tracing/rtla/src/osnoise_top.c | 6 +--
tools/tracing/rtla/src/timerlat_hist.c | 18 ++++----
tools/tracing/rtla/src/timerlat_top.c | 6 +--
tools/tracing/rtla/src/utils.c | 63 --------------------------
5 files changed, 24 insertions(+), 87 deletions(-)

diff --git a/tools/tracing/rtla/src/osnoise_hist.c b/tools/tracing/rtla/src/osnoise_hist.c
index d2b68177ffac..b616a72d5c0a 100644
--- a/tools/tracing/rtla/src/osnoise_hist.c
+++ b/tools/tracing/rtla/src/osnoise_hist.c
@@ -19,7 +19,7 @@

struct osnoise_hist_params {
char *cpus;
- char *monitored_cpus;
+ cpu_set_t monitored_cpus;
char *trace_output;
char *cgroup_name;
unsigned long long runtime;
@@ -274,7 +274,7 @@ static void osnoise_hist_header(struct osnoise_tool *tool)
trace_seq_printf(s, "Index");

for (cpu = 0; cpu < data->nr_cpus; cpu++) {
- if (params->cpus && !params->monitored_cpus[cpu])
+ if (params->cpus && !CPU_ISSET(cpu, &params->monitored_cpus))
continue;

if (!data->hist[cpu].count)
@@ -305,7 +305,7 @@ osnoise_print_summary(struct osnoise_hist_params *params,
trace_seq_printf(trace->seq, "count:");

for (cpu = 0; cpu < data->nr_cpus; cpu++) {
- if (params->cpus && !params->monitored_cpus[cpu])
+ if (params->cpus && !CPU_ISSET(cpu, &params->monitored_cpus))
continue;

if (!data->hist[cpu].count)
@@ -319,7 +319,7 @@ osnoise_print_summary(struct osnoise_hist_params *params,
trace_seq_printf(trace->seq, "min: ");

for (cpu = 0; cpu < data->nr_cpus; cpu++) {
- if (params->cpus && !params->monitored_cpus[cpu])
+ if (params->cpus && !CPU_ISSET(cpu, &params->monitored_cpus))
continue;

if (!data->hist[cpu].count)
@@ -334,7 +334,7 @@ osnoise_print_summary(struct osnoise_hist_params *params,
trace_seq_printf(trace->seq, "avg: ");

for (cpu = 0; cpu < data->nr_cpus; cpu++) {
- if (params->cpus && !params->monitored_cpus[cpu])
+ if (params->cpus && !CPU_ISSET(cpu, &params->monitored_cpus))
continue;

if (!data->hist[cpu].count)
@@ -352,7 +352,7 @@ osnoise_print_summary(struct osnoise_hist_params *params,
trace_seq_printf(trace->seq, "max: ");

for (cpu = 0; cpu < data->nr_cpus; cpu++) {
- if (params->cpus && !params->monitored_cpus[cpu])
+ if (params->cpus && !CPU_ISSET(cpu, &params->monitored_cpus))
continue;

if (!data->hist[cpu].count)
@@ -387,7 +387,7 @@ osnoise_print_stats(struct osnoise_hist_params *params, struct osnoise_tool *too
bucket * data->bucket_size);

for (cpu = 0; cpu < data->nr_cpus; cpu++) {
- if (params->cpus && !params->monitored_cpus[cpu])
+ if (params->cpus && !CPU_ISSET(cpu, &params->monitored_cpus))
continue;

if (!data->hist[cpu].count)
@@ -411,7 +411,7 @@ osnoise_print_stats(struct osnoise_hist_params *params, struct osnoise_tool *too
trace_seq_printf(trace->seq, "over: ");

for (cpu = 0; cpu < data->nr_cpus; cpu++) {
- if (params->cpus && !params->monitored_cpus[cpu])
+ if (params->cpus && !CPU_ISSET(cpu, &params->monitored_cpus))
continue;

if (!data->hist[cpu].count)
@@ -559,7 +559,7 @@ static struct osnoise_hist_params
osnoise_hist_usage("Bucket size needs to be > 0 and <= 1000000\n");
break;
case 'c':
- retval = parse_cpu_list(optarg, &params->monitored_cpus);
+ retval = parse_cpu_set(optarg, &params->monitored_cpus);
if (retval)
osnoise_hist_usage("\nInvalid -c cpu list\n");
params->cpus = optarg;
diff --git a/tools/tracing/rtla/src/osnoise_top.c b/tools/tracing/rtla/src/osnoise_top.c
index fcf6c14ce1bc..0e2f3b216d34 100644
--- a/tools/tracing/rtla/src/osnoise_top.c
+++ b/tools/tracing/rtla/src/osnoise_top.c
@@ -26,7 +26,7 @@ enum osnoise_mode {
*/
struct osnoise_top_params {
char *cpus;
- char *monitored_cpus;
+ cpu_set_t monitored_cpus;
char *trace_output;
char *cgroup_name;
unsigned long long runtime;
@@ -263,7 +263,7 @@ osnoise_print_stats(struct osnoise_top_params *params, struct osnoise_tool *top)
osnoise_top_header(top);

for (i = 0; i < nr_cpus; i++) {
- if (params->cpus && !params->monitored_cpus[i])
+ if (params->cpus && !CPU_ISSET(i, &params->monitored_cpus))
continue;
osnoise_top_print(top, i);
}
@@ -397,7 +397,7 @@ struct osnoise_top_params *osnoise_top_parse_args(int argc, char **argv)

break;
case 'c':
- retval = parse_cpu_list(optarg, &params->monitored_cpus);
+ retval = parse_cpu_set(optarg, &params->monitored_cpus);
if (retval)
osnoise_top_usage(params, "\nInvalid -c cpu list\n");
params->cpus = optarg;
diff --git a/tools/tracing/rtla/src/timerlat_hist.c b/tools/tracing/rtla/src/timerlat_hist.c
index d48c05d238f9..00287e96f22e 100644
--- a/tools/tracing/rtla/src/timerlat_hist.c
+++ b/tools/tracing/rtla/src/timerlat_hist.c
@@ -19,7 +19,7 @@

struct timerlat_hist_params {
char *cpus;
- char *monitored_cpus;
+ cpu_set_t monitored_cpus;
char *trace_output;
char *cgroup_name;
unsigned long long runtime;
@@ -227,7 +227,7 @@ static void timerlat_hist_header(struct osnoise_tool *tool)
trace_seq_printf(s, "Index");

for (cpu = 0; cpu < data->nr_cpus; cpu++) {
- if (params->cpus && !params->monitored_cpus[cpu])
+ if (params->cpus && !CPU_ISSET(cpu, &params->monitored_cpus))
continue;

if (!data->hist[cpu].irq_count && !data->hist[cpu].thread_count)
@@ -263,7 +263,7 @@ timerlat_print_summary(struct timerlat_hist_params *params,
trace_seq_printf(trace->seq, "count:");

for (cpu = 0; cpu < data->nr_cpus; cpu++) {
- if (params->cpus && !params->monitored_cpus[cpu])
+ if (params->cpus && !CPU_ISSET(cpu, &params->monitored_cpus))
continue;

if (!data->hist[cpu].irq_count && !data->hist[cpu].thread_count)
@@ -283,7 +283,7 @@ timerlat_print_summary(struct timerlat_hist_params *params,
trace_seq_printf(trace->seq, "min: ");

for (cpu = 0; cpu < data->nr_cpus; cpu++) {
- if (params->cpus && !params->monitored_cpus[cpu])
+ if (params->cpus && !CPU_ISSET(cpu, &params->monitored_cpus))
continue;

if (!data->hist[cpu].irq_count && !data->hist[cpu].thread_count)
@@ -303,7 +303,7 @@ timerlat_print_summary(struct timerlat_hist_params *params,
trace_seq_printf(trace->seq, "avg: ");

for (cpu = 0; cpu < data->nr_cpus; cpu++) {
- if (params->cpus && !params->monitored_cpus[cpu])
+ if (params->cpus && !CPU_ISSET(cpu, &params->monitored_cpus))
continue;

if (!data->hist[cpu].irq_count && !data->hist[cpu].thread_count)
@@ -331,7 +331,7 @@ timerlat_print_summary(struct timerlat_hist_params *params,
trace_seq_printf(trace->seq, "max: ");

for (cpu = 0; cpu < data->nr_cpus; cpu++) {
- if (params->cpus && !params->monitored_cpus[cpu])
+ if (params->cpus && !CPU_ISSET(cpu, &params->monitored_cpus))
continue;

if (!data->hist[cpu].irq_count && !data->hist[cpu].thread_count)
@@ -371,7 +371,7 @@ timerlat_print_stats(struct timerlat_hist_params *params, struct osnoise_tool *t
bucket * data->bucket_size);

for (cpu = 0; cpu < data->nr_cpus; cpu++) {
- if (params->cpus && !params->monitored_cpus[cpu])
+ if (params->cpus && !CPU_ISSET(cpu, &params->monitored_cpus))
continue;

if (!data->hist[cpu].irq_count && !data->hist[cpu].thread_count)
@@ -405,7 +405,7 @@ timerlat_print_stats(struct timerlat_hist_params *params, struct osnoise_tool *t
trace_seq_printf(trace->seq, "over: ");

for (cpu = 0; cpu < data->nr_cpus; cpu++) {
- if (params->cpus && !params->monitored_cpus[cpu])
+ if (params->cpus && !CPU_ISSET(cpu, &params->monitored_cpus))
continue;

if (!data->hist[cpu].irq_count && !data->hist[cpu].thread_count)
@@ -565,7 +565,7 @@ static struct timerlat_hist_params

break;
case 'c':
- retval = parse_cpu_list(optarg, &params->monitored_cpus);
+ retval = parse_cpu_set(optarg, &params->monitored_cpus);
if (retval)
timerlat_hist_usage("\nInvalid -c cpu list\n");
params->cpus = optarg;
diff --git a/tools/tracing/rtla/src/timerlat_top.c b/tools/tracing/rtla/src/timerlat_top.c
index 5395d1c5921e..920f2f6ef842 100644
--- a/tools/tracing/rtla/src/timerlat_top.c
+++ b/tools/tracing/rtla/src/timerlat_top.c
@@ -21,7 +21,7 @@

struct timerlat_top_params {
char *cpus;
- char *monitored_cpus;
+ cpu_set_t monitored_cpus;
char *trace_output;
char *cgroup_name;
unsigned long long runtime;
@@ -271,7 +271,7 @@ timerlat_print_stats(struct timerlat_top_params *params, struct osnoise_tool *to
timerlat_top_header(top);

for (i = 0; i < nr_cpus; i++) {
- if (params->cpus && !params->monitored_cpus[i])
+ if (params->cpus && !CPU_ISSET(i, &params->monitored_cpus))
continue;
timerlat_top_print(top, i);
}
@@ -422,7 +422,7 @@ static struct timerlat_top_params
params->aa_only = 1;
break;
case 'c':
- retval = parse_cpu_list(optarg, &params->monitored_cpus);
+ retval = parse_cpu_set(optarg, &params->monitored_cpus);
if (retval)
timerlat_top_usage("\nInvalid -c cpu list\n");
params->cpus = optarg;
diff --git a/tools/tracing/rtla/src/utils.c b/tools/tracing/rtla/src/utils.c
index ee6fab09acae..8f9ad8f01e0f 100644
--- a/tools/tracing/rtla/src/utils.c
+++ b/tools/tracing/rtla/src/utils.c
@@ -88,69 +88,6 @@ void get_duration(time_t start_time, char *output, int output_size)
tm_info->tm_sec);
}

-/*
- * parse_cpu_list - parse a cpu_list filling a char vector with cpus set
- *
- * Receives a cpu list, like 1-3,5 (cpus 1, 2, 3, 5), and then set the char
- * in the monitored_cpus.
- *
- * XXX: convert to a bitmask.
- */
-int parse_cpu_list(char *cpu_list, char **monitored_cpus)
-{
- char *mon_cpus;
- const char *p;
- int end_cpu;
- int nr_cpus;
- int cpu;
- int i;
-
- nr_cpus = sysconf(_SC_NPROCESSORS_CONF);
-
- mon_cpus = calloc(nr_cpus, sizeof(char));
- if (!mon_cpus)
- goto err;
-
- for (p = cpu_list; *p; ) {
- cpu = atoi(p);
- if (cpu < 0 || (!cpu && *p != '0') || cpu >= nr_cpus)
- goto err;
-
- while (isdigit(*p))
- p++;
- if (*p == '-') {
- p++;
- end_cpu = atoi(p);
- if (end_cpu < cpu || (!end_cpu && *p != '0') || end_cpu >= nr_cpus)
- goto err;
- while (isdigit(*p))
- p++;
- } else
- end_cpu = cpu;
-
- if (cpu == end_cpu) {
- debug_msg("cpu_list: adding cpu %d\n", cpu);
- mon_cpus[cpu] = 1;
- } else {
- for (i = cpu; i <= end_cpu; i++) {
- debug_msg("cpu_list: adding cpu %d\n", i);
- mon_cpus[i] = 1;
- }
- }
-
- if (*p == ',')
- p++;
- }
-
- *monitored_cpus = mon_cpus;
-
- return 0;
-
-err:
- debug_msg("Error parsing the cpu list %s", cpu_list);
- return 1;
-}
-
/*
* parse_cpu_set - parse a cpu_list filling cpu_set_t argument
*
--
2.39.2