Thanks Piotr for the info, but I am not sure the asm instructions ceph is using for probing cpu is compatible to AMD or not. Regards Somnath -----Original Message----- From: ceph-devel-owner@xxxxxxxxxxxxxxx [mailto:ceph-devel-owner@xxxxxxxxxxxxxxx] On Behalf Of Dalek, Piotr Sent: Sunday, June 28, 2015 11:27 PM To: ceph-devel@xxxxxxxxxxxxxxx Subject: RE: CRC32 of messages > -----Original Message----- > From: ceph-devel-owner@xxxxxxxxxxxxxxx [mailto:ceph-devel- > owner@xxxxxxxxxxxxxxx] On Behalf Of Somnath Roy > Sent: Friday, June 26, 2015 7:52 PM > > ceph_crc32c_intel_fast is ~6 times faster than ceph_crc32c_sctp. If > you are not using intel cpus or you have older intel cpus where this > sse4 instruction Not exactly true, AMD CPUs released after October 2011 support SSE 4.2 (which include CRC32 instructions) as well. See this: http://www.cpu-world.com/Glossary/S/SSE4.2.html With best regards / Pozdrawiam Piotr Dałek -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html ________________________________ PLEASE NOTE: The information contained in this electronic mail message is intended only for the use of the designated recipient(s) named above. If the reader of this message is not the intended recipient, you are hereby notified that you have received this message in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify the sender by telephone or e-mail (as shown above) immediately and destroy any and all copies of this message in your possession (whether hard copies or electronically stored copies). -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
