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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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ef1313deaf
Add a VMX optimised xor, used primarily for RAID5. On a POWER7 blade this is a decent win: 32regs : 17932.800 MB/sec altivec : 19724.800 MB/sec The bigger gain is when the same test is run in SMT4 mode, as it would if there was a lot of work going on: 8regs : 8377.600 MB/sec altivec : 15801.600 MB/sec I tested this against an array created without the patch, and also verified it worked as expected on a little endian kernel. [ Fix !CONFIG_ALTIVEC build -- BenH ] Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> |
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.. | ||
alloc.c | ||
checksum_32.S | ||
checksum_64.S | ||
checksum_wrappers_64.c | ||
code-patching.c | ||
copy_32.S | ||
copypage_64.S | ||
copypage_power7.S | ||
copyuser_64.S | ||
copyuser_power7.S | ||
crtsavres.S | ||
devres.c | ||
div64.S | ||
feature-fixups-test.S | ||
feature-fixups.c | ||
hweight_64.S | ||
ldstfp.S | ||
locks.c | ||
Makefile | ||
mem_64.S | ||
memcpy_64.S | ||
memcpy_power7.S | ||
rheap.c | ||
sstep.c | ||
string_64.S | ||
string.S | ||
usercopy_64.c | ||
vmx-helper.c | ||
xor_vmx.c |