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perf svghelper: Replace MAX_NR_CPUS with perf_env::nr_cpus_online 

'nr_cpus', the number of CPUs online during a record session bound by
MAX_NR_CPUS, can be used as a dynamic alternative for MAX_NR_CPUS in
svg_build_topology_map().

The value of nr_cpus can be passed into str_to_bitmap(),
scan_core_topology(), and svg_build_topology_map() to replace
MAX_NR_CPUS as well.

Signed-off-by: Kyle Meyer <kyle.meyer@hpe.com>
Reviewed-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russ Anderson <russ.anderson@hpe.com>
Link: http://lore.kernel.org/lkml/20190827214352.94272-3-meyerk@stormcage.eag.rdlabs.hpecorp.net
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Kyle Meyer 2019-08-27 16:43:47 -05:00 committed by Arnaldo Carvalho de Melo
parent 0ac1dd5b4a
commit f78f96676a
1 changed files with 16 additions and 17 deletions
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33
tools/perf/util/svghelper.c
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@ -697,7 +697,8 @@ struct topology {
int sib_thr_nr;
};
static void scan_thread_topology(int *map, struct topology *t, int cpu, int *pos)
static void scan_thread_topology(int *map, struct topology *t, int cpu,
int *pos, int nr_cpus)
{
int i;
int thr;
@ -706,28 +707,24 @@ static void scan_thread_topology(int *map, struct topology *t, int cpu, int *pos
if (!test_bit(cpu, cpumask_bits(&t->sib_thr[i])))
continue;
for_each_set_bit(thr,
cpumask_bits(&t->sib_thr[i]),
MAX_NR_CPUS)
for_each_set_bit(thr, cpumask_bits(&t->sib_thr[i]), nr_cpus)
if (map[thr] == -1)
map[thr] = (*pos)++;
}
}
static void scan_core_topology(int *map, struct topology *t)
static void scan_core_topology(int *map, struct topology *t, int nr_cpus)
{
int pos = 0;
int i;
int cpu;
for (i = 0; i < t->sib_core_nr; i++)
for_each_set_bit(cpu,
cpumask_bits(&t->sib_core[i]),
MAX_NR_CPUS)
scan_thread_topology(map, t, cpu, &pos);
for_each_set_bit(cpu, cpumask_bits(&t->sib_core[i]), nr_cpus)
scan_thread_topology(map, t, cpu, &pos, nr_cpus);
}
static int str_to_bitmap(char *s, cpumask_t *b)
static int str_to_bitmap(char *s, cpumask_t *b, int nr_cpus)
{
int i;
int ret = 0;
@ -740,7 +737,7 @@ static int str_to_bitmap(char *s, cpumask_t *b)
for (i = 0; i < m->nr; i++) {
c = m->map[i];
if (c >= MAX_NR_CPUS) {
if (c >= nr_cpus) {
ret = -1;
break;
}
@ -755,10 +752,12 @@ static int str_to_bitmap(char *s, cpumask_t *b)
int svg_build_topology_map(struct perf_env *env)
{
int i;
int i, nr_cpus;
struct topology t;
char *sib_core, *sib_thr;
nr_cpus = min(env->nr_cpus_online, MAX_NR_CPUS);
t.sib_core_nr = env->nr_sibling_cores;
t.sib_thr_nr = env->nr_sibling_threads;
t.sib_core = calloc(env->nr_sibling_cores, sizeof(cpumask_t));
@ -773,7 +772,7 @@ int svg_build_topology_map(struct perf_env *env)
}
for (i = 0; i < env->nr_sibling_cores; i++) {
if (str_to_bitmap(sib_core, &t.sib_core[i])) {
if (str_to_bitmap(sib_core, &t.sib_core[i], nr_cpus)) {
fprintf(stderr, "topology: can't parse siblings map\n");
goto exit;
}
@ -782,7 +781,7 @@ int svg_build_topology_map(struct perf_env *env)
}
for (i = 0; i < env->nr_sibling_threads; i++) {
if (str_to_bitmap(sib_thr, &t.sib_thr[i])) {
if (str_to_bitmap(sib_thr, &t.sib_thr[i], nr_cpus)) {
fprintf(stderr, "topology: can't parse siblings map\n");
goto exit;
}
@ -790,16 +789,16 @@ int svg_build_topology_map(struct perf_env *env)
sib_thr += strlen(sib_thr) + 1;
}
topology_map = malloc(sizeof(int) * MAX_NR_CPUS);
topology_map = malloc(sizeof(int) * nr_cpus);
if (!topology_map) {
fprintf(stderr, "topology: no memory\n");
goto exit;
}
for (i = 0; i < MAX_NR_CPUS; i++)
for (i = 0; i < nr_cpus; i++)
topology_map[i] = -1;
scan_core_topology(topology_map, &t);
scan_core_topology(topology_map, &t, nr_cpus);
return 0;