path: root/tools
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authorJiri Olsa <jolsa@redhat.com>2019-03-05 16:25:29 +0100
committerArnaldo Carvalho de Melo <acme@redhat.com>2019-03-06 18:15:24 -0300
commite34c940245437f36d2c492edd1f8237eff391064 (patch)
tree5a54c17399241a68fea8b75e50babb710b25fdca /tools
parentperf script python: Add Python3 support to intel-pt-events.py (diff)
perf c2c: Fix c2c report for empty numa node
Ravi Bangoria reported that we fail with an empty NUMA node with the following message: $ lscpu NUMA node0 CPU(s): NUMA node1 CPU(s): 0-4 $ sudo ./perf c2c report node/cpu topology bugFailed setup nodes Fix this by detecting the empty node and keeping its CPU set empty. Reported-by: Nageswara R Sastry <nasastry@in.ibm.com> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jonas Rabenstein <jonas.rabenstein@studium.uni-erlangen.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20190305152536.21035-2-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
1 files changed, 6 insertions, 2 deletions
diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 4272763a5e96..9e6cc868bdb4 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -2056,6 +2056,12 @@ static int setup_nodes(struct perf_session *session)
if (!set)
return -ENOMEM;
+ nodes[node] = set;
+ /* empty node, skip */
+ if (cpu_map__empty(map))
+ continue;
for (cpu = 0; cpu < map->nr; cpu++) {
set_bit(map->map[cpu], set);
@@ -2064,8 +2070,6 @@ static int setup_nodes(struct perf_session *session)
cpu2node[map->map[cpu]] = node;
- nodes[node] = set;