path: root/tools/perf/util/mmap.h
diff options
authorAlexey Budankov <alexey.budankov@linux.intel.com>2019-12-03 14:45:27 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2020-01-06 11:46:09 -0300
commit8384a2600c7ddfc875f64e160d8b423aca4e203a (patch)
treeed90ff3719bfd1e7bbcc6fa4a7716745cc596016 /tools/perf/util/mmap.h
parentperf mmap: Declare type for cpu mask of arbitrary length (diff)
perf record: Adapt affinity to machines with #CPUs > 1K
Use struct mmap_cpu_mask type for the tool's thread and mmap data buffers to overcome current 1024 CPUs mask size limitation of cpu_set_t type. Currently glibc's cpu_set_t type has an internal mask size limit of 1024 CPUs. Moving to the 'struct mmap_cpu_mask' type allows overcoming that limit. The tools bitmap API is used to manipulate objects of 'struct mmap_cpu_mask' type. Committer notes: To print the 'nbits' struct member we must use %zd, since it is a size_t, this fixes the build in some toolchains/arches. Reported-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/96d7e2ff-ce8b-c1e0-d52c-aa59ea96f0ea@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to '')
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index ef51667fabcb..9d5f589f02ae 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -40,7 +40,7 @@ struct mmap {
int nr_cblocks;
} aio;
- cpu_set_t affinity_mask;
+ struct mmap_cpu_mask affinity_mask;
void *data;
int comp_level;