diff options
| author | Jiri Olsa <jolsa@redhat.com> | 2019-03-05 16:25:29 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-05 22:31:27 +0200 |
| commit | 02241b9c8caa2c91c0bc0e0ef1269cef3ee2ab5f (patch) | |
| tree | a2b04eb4abba7245f44e888470ab62abc9773f5e | |
| parent | a5c4c0909a5ec79ea9b3f0b3b2ed5a3705549981 (diff) | |
perf c2c: Fix c2c report for empty numa node
[ Upstream commit e34c940245437f36d2c492edd1f8237eff391064 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | tools/perf/builtin-c2c.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c index fb76423022e8..32e64a8a6443 100644 --- a/tools/perf/builtin-c2c.c +++ b/tools/perf/builtin-c2c.c @@ -1935,6 +1935,12 @@ 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); @@ -1943,8 +1949,6 @@ static int setup_nodes(struct perf_session *session) cpu2node[map->map[cpu]] = node; } - - nodes[node] = set; } setup_nodes_header(); |