Date: Wed, 20 Dec 2006 10:37:13 +0100 From: Ivan Voras <ivoras@fer.hr> To: freebsd-stable@freebsd.org Subject: Re: Cached file read performance with 6.2-PRERELEASE Message-ID: <emb089$lum$1@sea.gmane.org> In-Reply-To: <200612200618.12826.joao@matik.com.br> References: <45888C68.10305@paradise.net.nz> <200612200618.12826.joao@matik.com.br>
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JoaoBR wrote: > hum, look my releng_6: > > # dd of=/dev/null if=/c/c1/file bs=8k > 100000+0 records in > 100000+0 records out > 819200000 bytes transferred in 1.017492 secs (805116851 bytes/sec) > # dd of=/dev/null if=/c/c1/file bs=8k > 100000+0 records in > 100000+0 records out > 819200000 bytes transferred in 1.015790 secs (806465915 bytes/sec) > # dd of=/dev/null if=/c/c1/file bs=32k > 25000+0 records in > 25000+0 records out > 819200000 bytes transferred in 0.896507 secs (913768635 bytes/sec) Similar here (RELENG_6, a fairly slow P4/2Ghz): > dd if=file of=/dev/null bs=8k 7690+1 records in 7690+1 records out 63003776 bytes transferred in 0.086171 secs (731146977 bytes/sec) > dd if=file of=/dev/null bs=32k 1922+1 records in 1922+1 records out 63003776 bytes transferred in 0.070524 secs (893366745 bytes/sec)
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