On Thu, 11 Feb 2010 21:28:20 -0700 (MST) Carlos Konstanski <[email protected]> dijo:
>On Thu, 11 Feb 2010, John Jason Jordan wrote: > >> Date: Thu, 11 Feb 2010 19:19:36 -0800 >> From: John Jason Jordan <[email protected]> >> Reply-To: "General Linux/UNIX discussion and help; civil and >> on-topic" <[email protected]> >> To: PLUG <[email protected]> >> Subject: [PLUG] Top is lying >> >> And so is System Monitor. >> >> Something is eating 100% of one of my CPUs on my Fedora 11 x86_64 >> Thinkpad. Occasionally it drops down, at which point the other CPU >> surges to 100%. (I think they switch back and forth, probably so one >> of them doesn't get too tired and go on strike.) >> >> System Monitor shows nothing taking more than a couple percent of >> either CPU. From the command line top also shows nothing. >> >> Are there other tools to sleuth this down? Commands I could use? >I've seen this kind of thing before. Where have I seen it? On an >Oracle database server that was attached to a NAS via NFS. The NFS >traffic was voluminous, and it used up some serious CPU. But it didn't >show up as a userland process because it was all happening in the >kernel. Top does not show you an individual process for kernel work >unless there's some userland connector process which is doing the >heavy lifting. > >So think about what you might be doing with your computer that is >exclusively working the kernel. This is making sense. At least it explains why something can be eating 100% of one of my CPUs, yet nothing shows up in top or System Monitor. Unfortunately, I know little of the kernel or how it works or what it does. I do know how to use kernels to make popcorn, but that is about it. Currently open apps include Vuze (Azureus), Claws Mail, and Firefox. Of these I suspect Vuze the most. Does a bittorrent client use processes that are exclusively working with the kernel? _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
