Messages in this thread | | | Date | Thu, 27 Apr 2006 10:03:16 +0200 | From | Jens Axboe <> | Subject | Re: Lockless page cache test results |
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On Thu, Apr 27 2006, KAMEZAWA Hiroyuki wrote: > On Wed, 26 Apr 2006 20:57:50 +0200 > Jens Axboe <axboe@suse.de> wrote: > > > On Wed, Apr 26 2006, Jens Axboe wrote: > > > We can speedup the lookups with find_get_pages(). The test does 64k max, > > > so with luck we should be able to pull 16 pages in at the time. I'll try > > > and run such a test. But boy I wish find_get_pages_contig() was there > > > for that. I think I'd prefer adding that instead of coding that logic in > > > splice, it can get a little tricky. > > > > Here's such a run, graphed with the other two. I'll redo the lockless > > side as well now, it's only fair to compare with that batching as well. > > > > Hi, thank you for interesting tests. > > >From user's view, I want to see the comparison among > - splice(file,/dev/null), > - mmap+madvise(file,WILLNEED)/write(/dev/null), > - read(file)/write(/dev/null) > in this 1-4 threads test. > > This will show when splice() can be used effectively.
Sure, should be easy enough to do.
-- Jens Axboe
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