From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 14 Aug 2002 04:34:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 14 Aug 2002 04:34:15 -0400 Received: from holomorphy.com ([66.224.33.161]:7092 "EHLO holomorphy") by vger.kernel.org with ESMTP id ; Wed, 14 Aug 2002 04:34:14 -0400 Date: Wed, 14 Aug 2002 01:36:04 -0700 From: William Lee Irwin III To: Andrew Morton Cc: Linus Torvalds , lkml Subject: Re: [patch 2/21] reduced locking in buffer.c Message-ID: <20020814083604.GN15685@holomorphy.com> Mail-Followup-To: William Lee Irwin III , Andrew Morton , Linus Torvalds , lkml References: <3D561473.40A53C0D@zip.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Description: brief message Content-Disposition: inline In-Reply-To: <3D561473.40A53C0D@zip.com.au> User-Agent: Mutt/1.3.25i Organization: The Domain of Holomorphy Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Aug 11, 2002 at 12:38:27AM -0700, Andrew Morton wrote: > Resend. Replace the buffer lru spinlock protection with > local_irq_disable and a cross-CPU call to invalidate them. dbench 256 on a 16x/16G numaq: Throughput 50.4801 MB/sec (NB=63.1001 MB/sec 504.801 MBit/sec) 256 procs c013bf74 6612685 74.0731 .text.lock.highmem c013b7d0 802362 8.98779 kunmap_high c013b5dc 593514 6.64834 kmap_high c012f260 107218 1.20102 generic_file_write c012e53c 85566 0.958481 file_read_actor c0114820 82810 0.92761 scheduler_tick c0105394 68424 0.766463 default_idle c0143c3c 42473 0.475768 block_prepare_write c01113b8 36678 0.410855 smp_apic_timer_interrupt c013564c 33728 0.37781 rmqueue c013bcbc 32868 0.368176 blk_queue_bounce c0142e38 23095 0.258702 create_empty_buffers c01143d8 22315 0.249965 load_balance c012dec0 20193 0.226195 unlock_page c014325c 19229 0.215397 __block_prepare_write c013b558 16795 0.188132 flush_all_zero_pkmaps c0135d28 15512 0.17376 page_cache_release c013429c 10994 0.123151 lru_cache_add c0135b10 10675 0.119578 __alloc_pages c013fa50 9353 0.104769 generic_file_llseek c0140044 8889 0.0995716 vfs_write c012dcb4 8417 0.0942844 add_to_page_cache