Ju, Seokmann wrote: > Hi, > > Are there any performance measurement tools available that running on > Linux? > I would like to measure disk I/O performance (file system and raw I/O) > on several kernels. > Please lead me to the place. The sg3_utils package may help with some raw SCSI and SATA disk I/O measurements. sg_dd, sgp_dd and sgm_dd are dd variants that let you tweak a lot of low level details. The sg_read utility can be used to measure disk cache throughput, transport speeds and command overhead. Recently I have been looking at measuring command overhead. On the disks that I am testing a zero block READ (i.e. issue a SCSI READ for zero blocks) is the fastest command. The most recent released sg3_utils can be found at: http://www.torque.net/sg [Utilities section] The latest beta is in the news section of that page. A description can be found at: http://www.torque.net/sg/u_index.html Doug Gilbert - : send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
