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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2017-11-18 02:31:22 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-18 03:10:04 +0300
commit64c349f4ae78723248c474531d0cbc524fc5ba77 (patch)
treeb8284ccb8224f9f4023d5b4c1caa6bc053a2c90f /mm/Kconfig
parent15df03c87983660a4d1eedb4541778592bd97684 (diff)
downloadlinux-64c349f4ae78723248c474531d0cbc524fc5ba77.tar.xz
mm: add infrastructure for get_user_pages_fast() benchmarking
Performance of get_user_pages_fast() is critical for some workloads, but it's tricky to test it directly. This patch provides /sys/kernel/debug/gup_benchmark that helps with testing performance of it. See tools/testing/selftests/vm/gup_benchmark.c for userspace counterpart. Link: http://lkml.kernel.org/r/20170908215603.9189-2-kirill.shutemov@linux.intel.com Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thorsten Leemhuis <regressions@leemhuis.info> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Huang Ying <ying.huang@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/Kconfig')
-rw-r--r--mm/Kconfig9
1 files changed, 9 insertions, 0 deletions
diff --git a/mm/Kconfig b/mm/Kconfig
index 9c4bdddd80c2..03ff7703d322 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -756,3 +756,12 @@ config PERCPU_STATS
This feature collects and exposes statistics via debugfs. The
information includes global and per chunk statistics, which can
be used to help understand percpu memory usage.
+
+config GUP_BENCHMARK
+ bool "Enable infrastructure for get_user_pages_fast() benchmarking"
+ default n
+ help
+ Provides /sys/kernel/debug/gup_benchmark that helps with testing
+ performance of get_user_pages_fast().
+
+ See tools/testing/selftests/vm/gup_benchmark.c