diff options
| author | Keith Busch <kbusch@kernel.org> | 2023-01-26 13:51:14 -0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-04-05 19:42:38 -0700 |
| commit | def8574308edbc3bca821fb965e429a2fe5f4971 (patch) | |
| tree | 415822a2abc80d0897b69c0c3e9b03a4981fa3a6 /mm/Kconfig | |
| parent | 3c556d2425b04054e22045d4ef7d34f163b7a71a (diff) | |
| download | linux-next-def8574308edbc3bca821fb965e429a2fe5f4971.tar.gz | |
dmapool: add alloc/free performance test
Patch series "dmapool enhancements", v4.
Time spent in dma_pool alloc/free increases linearly with the number of
pages backing the pool. We can reduce this to constant time with minor
changes to how free pages are tracked.
This patch (of 12):
Provide a module that allocates and frees many blocks of various sizes and
report how long it takes. This is intended to provide a consistent way to
measure how changes to the dma_pool_alloc/free routines affect timing.
Link: https://lkml.kernel.org/r/20230126215125.4069751-1-kbusch@meta.com
Link: https://lkml.kernel.org/r/20230126215125.4069751-2-kbusch@meta.com
Signed-off-by: Keith Busch <kbusch@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Tony Battersby <tonyb@cybernetics.com>
Signed-off-by: Andrew Morton <akpm@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 4751031f3f05..ca98b2072df5 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -1100,6 +1100,15 @@ comment "GUP_TEST needs to have DEBUG_FS enabled" config GUP_GET_PXX_LOW_HIGH bool +config DMAPOOL_TEST + tristate "Enable a module to run time tests on dma_pool" + depends on HAS_DMA + help + Provides a test module that will allocate and free many blocks of + various sizes and report how long it takes. This is intended to + provide a consistent way to measure how changes to the + dma_pool_alloc/free routines affect performance. + config ARCH_HAS_PTE_SPECIAL bool |