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| author | Jiri Olsa <jolsa@redhat.com> | 2019-03-05 18:25:29 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-03-07 00:15:24 +0300 |
| commit | e34c940245437f36d2c492edd1f8237eff391064 (patch) | |
| tree | 5a54c17399241a68fea8b75e50babb710b25fdca /tools/perf/builtin-c2c.c | |
| parent | fdf2460c297f1bb2f3bd20b3b52903b267af9050 (diff) | |
| download | linux-e34c940245437f36d2c492edd1f8237eff391064.tar.xz | |
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/perf/builtin-c2c.c')
| -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 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; } setup_nodes_header(); |