diff options
| author | Alexey Budankov <[email protected]> | 2019-12-03 14:45:27 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <[email protected]> | 2020-01-06 11:46:09 -0300 |
| commit | 8384a2600c7ddfc875f64e160d8b423aca4e203a (patch) | |
| tree | ed90ff3719bfd1e7bbcc6fa4a7716745cc596016 /tools/perf/scripts/python/export-to-sqlite.py | |
| parent | 9c080c0279a80057cad3dfc05d09fb283ddf72f4 (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 <[email protected]>
Signed-off-by: Alexey Budankov <[email protected]>
Acked-by: Jiri Olsa <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lore.kernel.org/lkml/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/export-to-sqlite.py')
0 files changed, 0 insertions, 0 deletions