Re: Ccache hangs while compiling and cache size is exaggerated
Hello! 08.01.2011, 21:00, Denny Lin dennyli...@hs.ntnu.edu.tw: 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? I'm also affected by ccache stalling is some circumstances. In my case it's mostly for large ports with parallell build enabled (MAKE_JOBS_SAFE) -- Dima Panov (flu...@freebsd.org) k...@freebsd team Facebook: http://www.facebook.com/?id=10181104157 ___ 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
Re: Ccache hangs while compiling and cache size is exaggerated
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 size6.9 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
Re: Ccache hangs while compiling and cache size is exaggerated
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). Not just every compilation attempt triggers it. Chances are closer to 100/1. Every time this happens, the cache size from $ ccache -s also becomes ridiculously large (larger than the actual cache size). $ ccache -s [...] cache size6.9 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 $ df ~/.ccache Filesystem SizeUsed Avail Capacity Mounted on /.../.ccache49G666M 48G 1%~/.ccache $ du -hs ~/.ccache 666M~/.ccache $ du -Ahs ~/.ccache 912M~/.ccache 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. -- Sphinx of black quartz judge my vow. ___ 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
Ccache hangs while compiling and cache size is exaggerated
Hi, I'm using ccache 3.1.3, and it often hangs while compiling. Every time this happens, the cache size from $ ccache -s also becomes ridiculously large (larger than the actual cache size). $ ccache -s [...] cache size6.9 Gbytes The filesystem says it's only 2.9 GB. I can reproduce this, but I don't know what is causing this. -- 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
Re: Ccache hangs while compiling and cache size is exaggerated
Denny Lin dennyli...@hs.ntnu.edu.tw writes: Hi, 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). Every time this happens, the cache size from $ ccache -s also becomes ridiculously large (larger than the actual cache size). $ ccache -s [...] cache size6.9 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 $ df ~/.ccache Filesystem SizeUsed Avail Capacity Mounted on /.../.ccache49G666M 48G 1%~/.ccache $ du -hs ~/.ccache 666M~/.ccache $ du -Ahs ~/.ccache 912M~/.ccache I can reproduce this, but I don't know what is causing this. ___ 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
