Messages in this thread | | | From | David Howells <> | Subject | Re: [linus:master] [iov_iter] c9eec08bac: vm-scalability.throughput -16.9% regression | Date | Thu, 16 Nov 2023 10:14:03 +0000 |
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David Laight <David.Laight@ACULAB.COM> wrote:
> On haswell (which is now quite old) both 'rep movsb' and > 'rep movsq' copy 16 bytes/clock unless the destination > is 32 byte aligned when they copy 32 bytes/clock. > Source alignment make no different, neither does byte > alignment.
I think the i3-4170 cpu I'm using is Haswell. Does that mean for my particular cpu, just using inline "rep movsb" is the best choice?
David
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