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| author | Feng Xue <feng.xue@amperecomputing.com> | 2019-08-14 10:48:05 +0800 |
|---|---|---|
| committer | Feng Xue <feng.xue@amperecomputing.com> | 2019-08-14 10:58:21 +0800 |
| commit | b68fabfbbc5a4178338e167f5517787b76eb5962 (patch) | |
| tree | e1b15af9e5b6397b16dc9021437d96ca5e6037f7 /sysdeps/aarch64/multiarch/memset_emag.S | |
| parent | c3ce62cc0bd6e8a33629e2aabb7783a322e9189c (diff) | |
| download | glibc-b68fabfbbc5a4178338e167f5517787b76eb5962.tar.gz glibc-b68fabfbbc5a4178338e167f5517787b76eb5962.tar.xz glibc-b68fabfbbc5a4178338e167f5517787b76eb5962.zip | |
aarch64: Disable using DC ZVA in emag memset
* sysdeps/aarch64/multiarch/memset_base64.S (DC_ZVA_THRESHOLD):
Disable DC ZVA code if this macro is defined as zero.
* sysdeps/aarch64/multiarch/memset_emag.S (DC_ZVA_THRESHOLD):
Change to zero to disable using DC ZVA.
Diffstat (limited to 'sysdeps/aarch64/multiarch/memset_emag.S')
| -rw-r--r-- | sysdeps/aarch64/multiarch/memset_emag.S | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/sysdeps/aarch64/multiarch/memset_emag.S b/sysdeps/aarch64/multiarch/memset_emag.S index 1c1fabc624..c2aed62fe5 100644 --- a/sysdeps/aarch64/multiarch/memset_emag.S +++ b/sysdeps/aarch64/multiarch/memset_emag.S @@ -21,12 +21,14 @@ # define MEMSET __memset_emag /* - * Using dc zva to zero memory does not produce better performance if + * Using DC ZVA to zero memory does not produce better performance if * memory size is not very large, especially when there are multiple - * processes/threads contending memory/cache. Here we use a somewhat - * large threshold to trigger usage of dc zva. -*/ -# define DC_ZVA_THRESHOLD 1024 + * processes/threads contending memory/cache. Here we set threshold to + * zero to disable using DC ZVA, which is good for multi-process/thread + * workloads. + */ + +# define DC_ZVA_THRESHOLD 0 # include "./memset_base64.S" #endif |