Date: Fri, 9 Mar 2018 15:01:31 +0300 From: Slawa Olhovchenkov <slw@zxy.spb.ru> To: Arshan Khanifar <arshan@freebsdfoundation.org> Cc: freebsd-current@freebsd.org Subject: Re: Performance Benchmark for PTI (aka Meltdown mitigation) Message-ID: <20180309120131.GA38546@zxy.spb.ru> In-Reply-To: <CADMyxqs93mbwxJB4C03LMfz5g3T45=n9NWBet_Wa22v4BO4LLA@mail.gmail.com> References: <CADMyxqs93mbwxJB4C03LMfz5g3T45=n9NWBet_Wa22v4BO4LLA@mail.gmail.com>
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On Thu, Mar 08, 2018 at 05:04:11PM -0500, Arshan Khanifar wrote: > Executive Summary: > - The PTI feature increases the system call times by more than 100%. > - As a macrobenchmark, buildworld was used. Wall clock and user time > showed no statistically-significant changes, while system time > increased by less than 5%. > > This email contains the results for benchmarking the performance of the > PTI patch on FreeBSD 12-current. As a microbenchmark, timing of > getppid(2) system call was used, and as a macrobenchmark, a number of > buildworld tasks were timed. > Can you also run pre-patched kernel?
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