Date: Mon, 3 Apr 2023 18:48:30 -0700 From: Craig Leres <leres@freebsd.org> To: Bakul Shah <bakul@iitbombay.org>, freebsd-hackers <freebsd-hackers@freebsd.org> Subject: Re: ccache Message-ID: <92bc05d9-14fc-0928-4f36-4b55815303fe@freebsd.org> In-Reply-To: <671864AD-11F0-487B-9597-ACF28D24591B@iitbombay.org> References: <671864AD-11F0-487B-9597-ACF28D24591B@iitbombay.org>
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On 4/3/23 17:09, Bakul Shah wrote:
> Am I use ccache incorrectly or is there a bug?
>
> # CCACHE_DIR=/usr/obj/ccache ccache -s
> cache directory /usr/obj/ccache
> primary config /usr/obj/ccache/ccache.conf
> secondary config (readonly) /usr/local/etc/ccache.conf
> stats updated Mon Apr 3 16:54:31 2023
> ...
> cleanups performed 507
> files in cache 2795230
> cache size 2.9 GB <===
> max cache size 15.0 GB
> # find /usr/obj/ccache -type f |wc
> 2795395 2795395 142222206
> # du -sh /usr/obj/ccache
> 83G /usr/obj/ccache <===
>
> I have
>
> WITH_CCACHE_BUILD=yes
> CCACHE_DIR=/usr/obj/ccache
>
> in /etc/make.conf
Thank you for bringing this up; I have the same issue and have never
figured it out. But I think I've found another piece or two of the puzzle.
Using my favorite ktrace trick we can see that by default it tries to
open /usr/local/etc/ccache.conf:
zinc 32 % cd /tmp && ktrace -di ccache -s > /dev/null
zinc 33 % kdump | fgrep NAMI | fgrep ccache.conf
17418 ccache NAMI "/usr/local/etc/ccache.conf"
17418 ccache NAMI "/home/zinc/u0/leres/.ccache/ccache.conf"
I suspect the trick here is when ccache runs inside a poudriere jail,
ccache.conf is not present and/or not in the right location.
On my build server I have /var/cache/ccache/ccache.conf which I believe
works for some things but I still have 46 GB in /var/cache/ccache and
/var/cache/ccache/ccache.conf is trying to limit use to 8 GB.
If I start up a poudriere jail and look around I find
/root/.ccache/ccache.conf is a copy of /var/cache/ccache/ccache.conf. So
I don't get why it doesn't work.
(Now I'll sit back and wait for something who knows more chimes in...)
Craig
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