linux-kernel - Re: [PATCH v6 0/7] tlb flush optimization on x86

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4FB4BBAC.1050106@intel.com>
Date:	Thu, 17 May 2012 16:49:48 +0800
From:	Alex Shi <alex.shi@...el.com>
To:	Alex Shi <alex.shi@...el.com>
CC:	tglx@...utronix.de, mingo@...hat.com, hpa@...or.com, arnd@...db.de,
	rostedt@...dmis.org, fweisbec@...il.com, jeremy@...p.org,
	riel@...hat.com, luto@....edu, avi@...hat.com, len.brown@...el.com,
	dhowells@...hat.com, fenghua.yu@...el.com, borislav.petkov@....com,
	yinghai@...nel.org, ak@...ux.intel.com, cpw@....com,
	steiner@....com, akpm@...ux-foundation.org, penberg@...nel.org,
	a.p.zijlstra@...llo.nl, hughd@...gle.com,
	kamezawa.hiroyu@...fujitsu.com, viro@...iv.linux.org.uk,
	linux-kernel@...r.kernel.org, yongjie.ren@...el.com
Subject: Re: [PATCH v6 0/7] tlb flush optimization on x86

Added a little more info.
the machine is 2P * 4core* HT NHM EP with 12GB memory, and THP set 'always'.

>

> Here is the macro benchmark to measure munmap change:
> 
> tlb_flushall_shift = -1
> [alexs@...-ne04 tlb]$ 
> [alexs@...-ne04 tlb]$ for t in `echo 4 8 16  `; do echo "=============== t = $t ===================="; for i in `echo  8 16 32  `; do sudo  ./munmap -t $t -n $i; done done
> =============== t = 4 ====================
> munmap use 164ms 5032ns/time, memory access uses 81605 times/thread/ms, cost 12ns/time
> munmap use 86ms 5251ns/time, memory access uses 83378 times/thread/ms, cost 11ns/time
> munmap use 46ms 5642ns/time, memory access uses 87212 times/thread/ms, cost 11ns/time
> =============== t = 8 ====================
> munmap use 197ms 6036ns/time, memory access uses 69295 times/thread/ms, cost 14ns/time
> munmap use 96ms 5896ns/time, memory access uses 71895 times/thread/ms, cost 13ns/time
> munmap use 62ms 7608ns/time, memory access uses 83895 times/thread/ms, cost 11ns/time
> =============== t = 16 ====================
> munmap use 274ms 8367ns/time, memory access uses 37860 times/thread/ms, cost 26ns/time
> munmap use 139ms 8543ns/time, memory access uses 38137 times/thread/ms, cost 26ns/time
> munmap use 74ms 9033ns/time, memory access uses 38349 times/thread/ms, cost 26ns/time
> [alexs@...-ne04 tlb]$ 
> [alexs@...-ne04 tlb]$ 
> tlb_flushall_shift = 5
> [alexs@...-ne04 tlb]$ for t in `echo 4 8 16  `; do echo "=============== t = $t ===================="; for i in `echo  8 16 32  `; do sudo  ./munmap -t $t -n $i; done done
> =============== t = 4 ====================
> munmap use 212ms 6485ns/time, memory access uses 114003 times/thread/ms, cost 8ns/time
> munmap use 130ms 7972ns/time, memory access uses 110725 times/thread/ms, cost 9ns/time
> munmap use 45ms 5581ns/time, memory access uses 87866 times/thread/ms, cost 11ns/time
> =============== t = 8 ====================
> munmap use 253ms 7734ns/time, memory access uses 94578 times/thread/ms, cost 10ns/time
> munmap use 147ms 9012ns/time, memory access uses 83851 times/thread/ms, cost 11ns/time
> munmap use 63ms 7713ns/time, memory access uses 87473 times/thread/ms, cost 11ns/time
> =============== t = 16 ====================
> munmap use 369ms 11284ns/time, memory access uses 38854 times/thread/ms, cost 25ns/time
> munmap use 264ms 16131ns/time, memory access uses 37870 times/thread/ms, cost 26ns/time
> munmap use 73ms 8981ns/time, memory access uses 38309 times/thread/ms, cost 26ns/time


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/