On Fri, 2007-10-19 at 16:47 +0200, BERTRAND Joël wrote: > Ming Zhang wrote: > > > > as Ross pointed out, many io pattern only have 1 outstanding io at any > > time, so there is only one work thread actively to serve it. so it can > > not exploit the multiple core here. > > > > > > you see 100% at nullio or fileio? with disk, most time should spend on > > iowait and cpu utilization should not high at all. > > With both nullio and fileio... it is weired. with file io, run some io load, then run "vmstat 1" and post here. supposed to see some iowait instead of high sys cpu usage... -- Ming Zhang @#$%^ purging memory... (*!% http://blackmagic02881.wordpress.com/ http://www.linkedin.com/in/blackmagic02881 -------------------------------------------- - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
