Messages in this thread | ![/](/images/icornerl.gif) | | Subject | Re: DMA transfers in 2.5.67 | From | (Måns Rullgård) | Date | 16 Apr 2003 12:13:09 +0200 |
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Andrew Morton <akpm@digeo.com> writes:
> > # mount /ext3_fs > > # time dd if=/ext3_fs/100MiB_file of=/dev/null bs=32k > > > > 2.4.20aa1 : 3.3 sec (exactly what I expect to see) > > 2.5.66 : 6.6 sec > > With this test 2.4 will leave a lot more unwritten dirty data in memory. > > You should include a `sync' in the timings.
That was reading a file discarding that data. A sync shouldn't make any difference.
-- Måns Rullgård mru@users.sf.net - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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