From: William Lee Irwin III <wli@holomorphy.com>
To: Andrew Morton <akpm@zip.com.au>
Cc: Linus Torvalds <torvalds@transmeta.com>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: [patch 2/21] reduced locking in buffer.c
Date: Wed, 14 Aug 2002 01:36:04 -0700 [thread overview]
Message-ID: <20020814083604.GN15685@holomorphy.com> (raw)
In-Reply-To: <3D561473.40A53C0D@zip.com.au>
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
prev parent reply other threads:[~2002-08-14 8:34 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-11 7:38 [patch 2/21] reduced locking in buffer.c Andrew Morton
2002-08-13 17:34 ` Linus Torvalds
2002-08-13 17:34 ` David S. Miller
2002-08-13 17:53 ` Andrew Morton
2002-08-13 17:52 ` Christoph Hellwig
2002-08-13 18:09 ` Andrew Morton
2002-08-14 8:36 ` William Lee Irwin III [this message]
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