Date: Tue, 10 Feb 2009 18:05:18 +0100 (CET) From: Kai Mosebach <xen@komadev.de> To: freebsd-xen <freebsd-xen@freebsd.org> Subject: domU performance Message-ID: <27423886.41631234285518798.JavaMail.root@zim.freshx.de> In-Reply-To: <20984507.41581234284966568.JavaMail.root@zim.freshx.de>
next in thread | previous in thread | raw e-mail | index | archive | help
Hi, just as a note, since it is not important in the current state, i guess (but maybe you might have some tweaking tips) Testing the raw performance on my domU (r188436 compiled without WITNESS) seems to fall behind a Linux domU on the same machine: BSD8 Reading: # dd if=/dev/ad0s1 bs=1024k | cpipe -vt -b 65535 | cat >/dev/null ... thru: 1200.000ms at 53.3MB/s ( 57.3MB/s avg) 2.2GB ... 2401239040 bytes transferred in 40.000000 secs (60030976 bytes/sec) BSD8 Writing : # dd if=/dev/zero bs=1024k | cpipe -vt -b 65535 |dd of=/bigfile ... thru: 4400.000ms at 14.5MB/s ( 13.2MB/s avg) 2.8GB ... 3044998656 bytes transferred in 222.500000 secs (13685387 bytes/sec) On the Linux side i get Linux Reading (~15% faster): # dd if=/dev/sda bs=1024k | cat | dd of=/dev/null 4870635520 bytes (4.9 GB) copied, 73.7775 seconds, 66.0 MB/s Linux Writing: (~90% faster) # dd if=/dev/zero bs=1024k | cat | dd of=/root/test2 2473590784 bytes (2.5 GB) copied, 98.9709 seconds, 25.0 MB/s cheers Kai
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?27423886.41631234285518798.JavaMail.root>