On Tue, Jan 04, 2011 at 04:23:12AM +0200, Volodymyr Kostyrko wrote: > 02.01.2011 16:01, Anonymous wrote: > >>I'm using ccache 3.1.3, and it often hangs while compiling. > > > >What its waiting channel? Hit ^T when it hangs or run under ktrace(1).
This is what appears when I hit ^T: load: 0.96 cmd: ccache 25893 [zio->io_cv)] 3.83r 0.00u 0.06s 1% 1604k > Not just every compilation attempt triggers it. Chances are closer to 100/1. Correct, but it's always triggered at the same point. > >>Every time this happens, the cache size from $ ccache -s also becomes > >>ridiculously large (larger than the actual cache size). > >> > >>$ ccache -s > >>[...] > >>cache size 6.9 Gbytes > > > >>The filesystem says it's only 2.9 GB. > > > >How did you measure it? du(1) with `-A' option? > >For example, compression can make difference Compression is turned off. > I'd clarify this one. ccache reports size of cache +4G per damaged > subdir. If damaged subdir would be removed ccache reports normal size of > cache again. > > >>I can reproduce this, but I don't know what is causing this. > > This gives high IO. When ccache thinks cache is full it tries to purge > it, yet purge does nothing. But this means walking all subdir per each > compilation. This seems to be the exact reason ccache is hanging. Does anyone have a clue why subdirs are getting damaged and how this can be prevented? -- Denny Lin _______________________________________________ freebsd-ports@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-ports To unsubscribe, send any mail to "freebsd-ports-unsubscr...@freebsd.org"
