Messages in this thread | | | Subject | Re: [PATCH 14/14] crc32: Select an algorithm via kconfig | From | Joakim Tjernlund <> | Date | Tue, 13 Dec 2011 09:27:10 +0100 |
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"Darrick J. Wong" <djwong@us.ibm.com> wrote on 2011/12/13 07:32:28: > > On Mon, Dec 12, 2011 at 05:10:45PM -0600, Bob Pearson wrote: > > That choice was for Joakim who measured better performance on his 32 bit PPC > > platform with "by 4". > > Ok. On my 1.33GHz PowerBook I get ~255MB/s with slice by 4 and ~270MB/s with > slice by 8. I think it's a PPC 7447, and definitely 32-bit. In any case, it > reports having 32K of L1D cache.
I tested Bobs early version on my mpc8321(266MHz, embedded CPU) and it was just half the speed compared with current crc32.
Jocke
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