Date: Mon, 7 Feb 2005 11:33:40 +0300 From: Andrey Smagin <samspeed@mail.ru> To: freebsd-performance@freebsd.org Subject: My notices about ATA performance Message-ID: <1189321068.20050207113340@mail.ru>
next in thread | raw e-mail | index | archive | help
Hi ALL. I have 2 PC. 1. iP 166 (RAM 48Mb) 2. Duron 1133 (RAM 1Gb) 2 HDD - WD and Seagate (120GB/8Mb cache). Kernels used FreeBSD 4.8 RELEASE FreeBSD 5.1 RELEASE FreeBSD 6.0 CURRENT (1-2 week old) Test speed of copying 1 large (600Mb) file from 1 HDD to another. If put HDD's on PC 1 under 4.8 - 7-10 MBytes/s (UDMA33)(60%CPU Usage) under 5.1 - 2.7-3 MBytes/s (UDMA33)(100%CPU Usage) under 6.0 - 2.7-3 MBytes/s (UDMA33)(100%CPU Usage) If put better CPU K6-2-233 on PC 1 then speed of copying increased under 5.1 - 3.2-4 MBytes/s (UDMA33)(100%CPU Usage) under 6.0 - 3.2-4 MBytes/s (UDMA33)(100%CPU Usage) If put HDD's on PC 2 under 4.8 not tested under 5.1 - 34-41 MBytes/s (UDMA100)(~30%CPU Usage) under 6.0 - 33-41 MBytes/s (UDMA100)(~30%CPU Usage) Why speed of IO operations very depend from CPU power in 5x and 6.x ? -- Best regards, Andrey mailto:samspeed@mail.ru
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?1189321068.20050207113340>