From mboxrd@z Thu Jan 1 00:00:00 1970 From: keith.busch@intel.com (Keith Busch) Date: Fri, 13 Jun 2014 09:16:41 -0600 (MDT) Subject: [PATCH v7] NVMe: conversion to blk-mq In-Reply-To: <539B14A9.8010204@fb.com> References: <1402392038-5268-2-git-send-email-m@bjorling.me> <5397636F.9050209@fb.com> <5397753B.2020009@fb.com> <20140610213333.GA10055@linux.intel.com> <539889DC.7090704@fb.com> <20140611170917.GA12025@linux.intel.com> <5399BA00.7000705@bjorling.me> <539B05A1.7080700@fb.com> <539B14A9.8010204@fb.com> Message-ID: On Fri, 13 Jun 2014, Jens Axboe wrote: > On 06/13/2014 09:05 AM, Keith Busch wrote: >> Here are the performance drops observed with blk-mq with the existing >> driver as baseline: >> >> CPU : Drop >> ....:..... >> 0 : -6% >> 8 : -36% >> 16 : -12% > > We need the hints back for sure, I'll run some of the same tests and > verify to be sure. Out of curiousity, what is the topology like on your > box? Are 0/1 siblings, and 0..7 one node? 0-7 are different cores on node 0, with 16-23 being their thread siblings. Similiar setup with 8-15 and 24-32 on node 1.