From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx162.postini.com [74.125.245.162]) by kanga.kvack.org (Postfix) with SMTP id 3B5016B0005 for ; Thu, 4 Apr 2013 04:38:25 -0400 (EDT) Received: from /spool/local by e28smtp06.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 4 Apr 2013 14:03:50 +0530 Received: from d28relay02.in.ibm.com (d28relay02.in.ibm.com [9.184.220.59]) by d28dlp02.in.ibm.com (Postfix) with ESMTP id 20E8E394002D for ; Thu, 4 Apr 2013 14:08:18 +0530 (IST) Received: from d28av05.in.ibm.com (d28av05.in.ibm.com [9.184.220.67]) by d28relay02.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r348cEk63801410 for ; Thu, 4 Apr 2013 14:08:14 +0530 Received: from d28av05.in.ibm.com (loopback [127.0.0.1]) by d28av05.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r348cGL3021084 for ; Thu, 4 Apr 2013 19:38:17 +1100 From: "Aneesh Kumar K.V" Subject: Re: [PATCH -V5 00/25] THP support for PPC64 In-Reply-To: <515D1A2C.1000606@gmail.com> References: <1365055083-31956-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> <515D1A2C.1000606@gmail.com> Date: Thu, 04 Apr 2013 14:08:15 +0530 Message-ID: <878v4y4rns.fsf@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain Sender: owner-linux-mm@kvack.org List-ID: To: Simon Jeons Cc: benh@kernel.crashing.org, paulus@samba.org, linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org Simon Jeons writes: > Hi Aneesh, > On 04/04/2013 01:57 PM, Aneesh Kumar K.V wrote: >> Hi, >> >> This patchset adds transparent hugepage support for PPC64. >> >> TODO: >> * hash preload support in update_mmu_cache_pmd (we don't do that for hugetlb) >> >> Some numbers: >> >> The latency measurements code from Anton found at >> http://ozlabs.org/~anton/junkcode/latency2001.c >> >> THP disabled 64K page size >> ------------------------ >> [root@llmp24l02 ~]# ./latency2001 8G >> 8589934592 731.73 cycles 205.77 ns >> [root@llmp24l02 ~]# ./latency2001 8G >> 8589934592 743.39 cycles 209.05 ns > > Could you explain what's the meaning of result? > That is the total memory range, cycles taken to access an address and time taken to access. That numbers shows the overhead of tlb miss. you can find the source at http://ozlabs.org/~anton/junkcode/latency2001.c -aneesh -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org