summaryrefslogtreecommitdiff
path: root/tools
diff options
context:
space:
mode:
authorAdrian Hunter <adrian.hunter@intel.com>2021-01-07 19:41:59 +0200
committerArnaldo Carvalho de Melo <acme@redhat.com>2021-01-15 17:28:27 -0300
commit5501e9229a80d95a1ea68609f44c447a75d23ed5 (patch)
tree99e210837098c3421069de4eddec5e827738f0c4 /tools
parenta1bf23052bdfe30ec3c693cf32feb2d79114ac16 (diff)
downloadlinux-next-5501e9229a80d95a1ea68609f44c447a75d23ed5.tar.gz
perf intel-pt: Fix 'CPU too large' error
In some cases, the number of cpus (nr_cpus_online) is confused with the maximum cpu number (nr_cpus_avail), which results in the error in the example below: Example on system with 8 cpus: Before: # echo 0 > /sys/devices/system/cpu/cpu2/online # ./perf record --kcore -e intel_pt// taskset --cpu-list 7 uname Linux [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.147 MB perf.data ] # ./perf script --itrace=e Requested CPU 7 too large. Consider raising MAX_NR_CPUS 0x25908 [0x8]: failed to process type: 68 [Invalid argument] After: # ./perf script --itrace=e # Fixes: 8c7274691f0d ("perf machine: Replace MAX_NR_CPUS with perf_env::nr_cpus_online") Fixes: 7df4e36a4785 ("perf session: Replace MAX_NR_CPUS with perf_env::nr_cpus_online") Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Tested-by: Kan Liang <kan.liang@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: stable@vger.kernel.org Link: http://lore.kernel.org/lkml/20210107174159.24897-1-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/util/machine.c4
-rw-r--r--tools/perf/util/session.c2
2 files changed, 3 insertions, 3 deletions
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index f841f3503cae..1e9d3f982b47 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -2980,7 +2980,7 @@ int machines__for_each_thread(struct machines *machines,
pid_t machine__get_current_tid(struct machine *machine, int cpu)
{
- int nr_cpus = min(machine->env->nr_cpus_online, MAX_NR_CPUS);
+ int nr_cpus = min(machine->env->nr_cpus_avail, MAX_NR_CPUS);
if (cpu < 0 || cpu >= nr_cpus || !machine->current_tid)
return -1;
@@ -2992,7 +2992,7 @@ int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid,
pid_t tid)
{
struct thread *thread;
- int nr_cpus = min(machine->env->nr_cpus_online, MAX_NR_CPUS);
+ int nr_cpus = min(machine->env->nr_cpus_avail, MAX_NR_CPUS);
if (cpu < 0)
return -EINVAL;
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 50ff9795a4f1..25adbcce0281 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -2404,7 +2404,7 @@ int perf_session__cpu_bitmap(struct perf_session *session,
{
int i, err = -1;
struct perf_cpu_map *map;
- int nr_cpus = min(session->header.env.nr_cpus_online, MAX_NR_CPUS);
+ int nr_cpus = min(session->header.env.nr_cpus_avail, MAX_NR_CPUS);
for (i = 0; i < PERF_TYPE_MAX; ++i) {
struct evsel *evsel;