path: root/tools
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authorJakub Jelen <>2016-03-19 12:58:07 +0100
committerArnaldo Carvalho de Melo <>2016-03-21 17:46:57 -0300
commit3c52b658b8e4fbbf7975932bbdc4798421dbcb15 (patch)
treec5b0cc391c16aa08836f6908b41f9e4500b4724f /tools
parent73cdf0c6ea9c597894924f3b91ad636389555c1b (diff)
perf bench numa: Fix assertion for nodes bitfield
Comparing bits and bytes in numa benchmark assertion I hit the issue on two socket Power8 machine presenting its numa nodes as 0,1,16,17 (according to numactl). Therefore I got error (and hang of parent process): perf: bench/numa.c:296: bind_to_memnode: Assertion `!(g->p.nr_nodes > (int)sizeof(nodemask))' failed. This is obviously false positive. We can fit all the 18 nodes into bitfield of 8 bytes (long on 64b architecture). Signed-off-by: Jakub Jelen <> Cc: Alexander Shishkin <> Cc: Jakub Jelen <> Cc: Peter Zijlstra <> Cc: Link: Signed-off-by: Arnaldo Carvalho de Melo <>
Diffstat (limited to 'tools')
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/bench/numa.c b/tools/perf/bench/numa.c
index 5049d6357a46..7500d959d7eb 100644
--- a/tools/perf/bench/numa.c
+++ b/tools/perf/bench/numa.c
@@ -293,7 +293,7 @@ static void bind_to_memnode(int node)
if (node == -1)
- BUG_ON(g->p.nr_nodes > (int)sizeof(nodemask));
+ BUG_ON(g->p.nr_nodes > (int)sizeof(nodemask)*8);
nodemask = 1L << node;
ret = set_mempolicy(MPOL_BIND, &nodemask, sizeof(nodemask)*8);