a7y18lte-ubports/android_kernel_samsung_a7y18lte
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ARM64: configs: Make zsmalloc copy rather than mapping pages

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VM mapping is ~5x slower than simply copying memory to access
cross-page allocations on both our little and big cluster CPUs.

	zsmalloc copy	zsmalloc vmap
cpu0	1456637		255254
cpu1	1463270	    	243098
cpu2	1441192		242113
cpu3	1446096	    	269415
cpu4	1830798		486465
cpu5	2703679	    	641879
cpu6	2568903		642474
cpu7	2128928	    	480830

Little 10kmaps	145	25	(slowdown: 5.8x)
Big 10kmaps	231	56	(slowdown: 4.1x)
This commit is contained in:
Danny Lin 2020-08-24 22:50:36 +05:30 committed by prashantpaddune
parent 8b6441f1f9
commit 28bdcbbab1
1 changed files with 1 additions and 1 deletions
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arch/arm64/configs/exynos7885-a7y18lte_defconfig
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@ -491,7 +491,7 @@ CONFIG_CMA_AREAS=7
CONFIG_ZPOOL=y
# CONFIG_ZBUD is not set
CONFIG_ZSMALLOC=y
CONFIG_PGTABLE_MAPPING=y
# CONFIG_PGTABLE_MAPPING is not set
CONFIG_ZSMALLOC_STAT=y
# CONFIG_DIRECT_RECLAIM_FILE_PAGES_ONLY is not set
# CONFIG_INCREASE_MAXIMUM_SWAPPINESS is not set