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| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2017-11-18 00:31:22 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-18 01:10:04 +0100 |
| commit | 64c349f4ae78723248c474531d0cbc524fc5ba77 (patch) | |
| tree | b8284ccb8224f9f4023d5b4c1caa6bc053a2c90f /mm/Kconfig | |
| parent | sysvipc: make get_maxid O(1) again (diff) | |
| download | linux-64c349f4ae78723248c474531d0cbc524fc5ba77.tar.xz linux-64c349f4ae78723248c474531d0cbc524fc5ba77.zip | |
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/Kconfig | 9 |
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 |