From: Alex Shi <alex.shi@intel.com>
To: Alex Shi <alex.shi@intel.com>
Cc: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
arnd@arndb.de, rostedt@goodmis.org, fweisbec@gmail.com,
jeremy@goop.org, riel@redhat.com, luto@mit.edu, avi@redhat.com,
len.brown@intel.com, dhowells@redhat.com, fenghua.yu@intel.com,
borislav.petkov@amd.com, yinghai@kernel.org, ak@linux.intel.com,
cpw@sgi.com, steiner@sgi.com, akpm@linux-foundation.org,
penberg@kernel.org, a.p.zijlstra@chello.nl, hughd@google.com,
kamezawa.hiroyu@jp.fujitsu.com, viro@zeniv.linux.org.uk,
linux-kernel@vger.kernel.org, yongjie.ren@intel.com
Subject: Re: [PATCH v6 0/7] tlb flush optimization on x86
Date: Thu, 17 May 2012 16:49:48 +0800 [thread overview]
Message-ID: <4FB4BBAC.1050106@intel.com> (raw)
In-Reply-To: <4FB4B964.6050501@intel.com>
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@lkp-ne04 tlb]$
> [alexs@lkp-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 $i; done done
> =============== t = 4 ====================
> munmap use 164ms 5032ns/time, memory access uses 81605 times/thread/ms, cost 12ns/time
> munmap use 86ms 5251ns/time, memory access uses 83378 times/thread/ms, cost 11ns/time
> munmap use 46ms 5642ns/time, memory access uses 87212 times/thread/ms, cost 11ns/time
> =============== t = 8 ====================
> munmap use 197ms 6036ns/time, memory access uses 69295 times/thread/ms, cost 14ns/time
> munmap use 96ms 5896ns/time, memory access uses 71895 times/thread/ms, cost 13ns/time
> munmap use 62ms 7608ns/time, memory access uses 83895 times/thread/ms, cost 11ns/time
> =============== t = 16 ====================
> munmap use 274ms 8367ns/time, memory access uses 37860 times/thread/ms, cost 26ns/time
> munmap use 139ms 8543ns/time, memory access uses 38137 times/thread/ms, cost 26ns/time
> munmap use 74ms 9033ns/time, memory access uses 38349 times/thread/ms, cost 26ns/time
> [alexs@lkp-ne04 tlb]$
> [alexs@lkp-ne04 tlb]$
> tlb_flushall_shift = 5
> [alexs@lkp-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
next prev parent reply other threads:[~2012-05-17 8:51 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-17 5:42 [PATCH v6 0/7] tlb flush optimization on x86 Alex Shi
2012-05-17 5:42 ` [PATCH v6 1/7] x86/tlb: unify TLB_FLUSH_ALL definition Alex Shi
2012-05-17 5:42 ` [PATCH v6 2/7] x86/tlb_info: get last level TLB entry number of CPU Alex Shi
2012-05-17 5:42 ` [PATCH v6 3/7] x86/flush_tlb: try flush_tlb_single one by one in flush_tlb_range Alex Shi
2012-05-17 5:42 ` [PATCH v6 4/7] x86/tlb: fall back to flush all when meet a THP large page Alex Shi
2012-05-17 5:42 ` [PATCH v6 5/7] x86/tlb: add tlb_flushall_shift for specific CPU Alex Shi
2012-05-17 5:42 ` [PATCH v6 6/7] x86/tlb: enable tlb flush range support for generic mmu on x86 Alex Shi
2012-05-17 5:42 ` [PATCH v6 7/7] x86/tlb: add tlb_flushall_shift knob into debugfs Alex Shi
2012-05-17 8:40 ` [PATCH v6 0/7] tlb flush optimization on x86 Alex Shi
2012-05-17 8:49 ` Alex Shi [this message]
2012-05-18 0:16 ` Alex Shi
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