Messages in this thread | | | Date | Fri, 12 Jun 2009 23:51:19 -0600 | Subject | Re: IO latency - a special case | From | "Trenton D. Adams" <> |
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On Fri, Jun 12, 2009 at 10:24 PM, Arjan van de Ven<arjan@infradead.org> wrote: > On Fri, 12 Jun 2009 21:48:41 -0600 > "Trenton D. Adams" <trenton.d.adams@gmail.com> wrote: > >> Sorry I didn't reply earlier. I got busy with some server troubles >> and such. >> > What sort of process where you typicalling trying to kill using ^C? >> >> It's maven, which spawns javac (java compiler), as well as does >> various other tasks such as making connections to the Internet, local >> directories, etc. > > I assume you know latencytop and how it might be useful to diagnose > such delays ?
Your assumption would be incorrect. ;) Never heard of it before now. But, I did have it installed for some reason.
However, when this starts happening, it's dang near impossible to do anything on the machine. I wouldn't be able to run it if I tried, though I will try :D. I barely have enough time to Ctrl-C before the machines locks for about 3600 seconds. And during that time (around 10-30 seconds), I can't really switch applications, as the latency is so high.
Right now, just during normal system usage, it's showing... Cause Maximum Percentage poll_schedule_timeout do_sys_poll sys_poll sysente 5.0 msec 58.0 % futex_wait do_futex compat_sys_futex sysenter_disp 5.0 msec 40.3 % blk_execute_rq scsi_execute scsi_execute_req scsi_ 3.9 msec 0.2 % blk_execute_rq scsi_execute scsi_execute_req sd_re 3.5 msec 0.2 % poll_schedule_timeout do_select core_sys_select sy 3.4 msec 0.3 % blk_execute_rq scsi_execute scsi_execute_req sr_te 2.6 msec 0.5 % blk_execute_rq scsi_execute scsi_execute_req sr_te 2.2 msec 0.5 % blk_execute_rq scsi_execute sr_do_ioctl sr_packet 0.9 msec 0.1 % blk_execute_rq scsi_execute scsi_execute_req ioctl 0.6 msec 0.0 % release __blkdev_put blkdev_put blkdev_close __fput -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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