Messages in this thread | | | Date | Tue, 2 Sep 2008 02:12:57 +0200 | From | "J.A. Magallón" <> | Subject | Re: Finding what is stuck... |
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On Mon, 1 Sep 2008 17:08:12 -0700, Arjan van de Ven <arjan@infradead.org> wrote:
> On Tue, 2 Sep 2008 02:04:47 +0200 > "J.A. Magallón" <jamagallon@ono.com> wrote: > > > Hi all... > > > > I'm running 2.6.27-rc5-git2 on an Aspire One. > > The system is in general pretty responsive, but sometimes it just gets > > totally stuck. Even the mouse stops. > > > > It looks related to disk (SSD) access, but I'm not totally sure. > > Is there any way to find what is getting stuck ? I know that SSDs can > > be slow on write, I don't mind if the system is faster or slower > > (it's small :))), but if the speed is constant. That occasional > > pauses are strange, like if SSD flushing gets stuck on BKL > > (I know, no idea about what I talk...). > > > > I'm using ext3 fs, noop iosched. But as I say, I'm not sure that the > > disk writes are the culprit. > > > > Any idea about how to find this ? > > Have you tried to run "latencytop"? > (you need to enable this in the kernel config as well) > > it tends to (for me at least) point out very well where stalls happen, > or at least, what the system is doing when they happen. > > (hint: make sure you do "make install" before running it) >
Thanks, I'm a bit limited to distro kernels 'cause I don't want to build my own kernel on the One, but I have just looked and Mandriva kernel is built with LATENCYTOP=y. I will try that and report...
-- J.A. Magallon \ Software is like sex: \ It's better when it's free Mandriva Linux release 2008.1 (Cooker) for i586 Linux kernel 2.6.23-jam01, gcc version 4.2.2 20070909 -- 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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