[PATCH] powerpc: Add VMX optimised xor for RAID5

2013-10-14 Thread Anton Blanchard
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

Re: [PATCH] powerpc: Add VMX optimised xor for RAID5

2013-10-10 Thread Benjamin Herrenschmidt
On Thu, 2013-09-26 at 13:30 +1000, Anton Blanchard wrote: > 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 > wou

[PATCH] powerpc: Add VMX optimised xor for RAID5

2013-09-25 Thread Anton Blanchard
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 the machine was busy: 8regs : 8377.600 MB/sec altivec