Date: Tue, 15 Nov 2005 19:30:50 -0500
From: michael johnson <buhnux@gmail.com>
To: Maxim.Sobolev@portaone.com
Cc: Nicolas Blais <nb_root@videotron.ca>, Steve Hodgson <steve@acidy.com>, freebsd-current@freebsd.org, Jens Schweikhardt <schweikh@schweikhardt.net>
Subject: Re: Using ccache for build{world, kernel}
Message-ID: <3DE7B806-FB6B-4388-8FC7-E495F82E9D9B@ahze.net>
In-Reply-To: <437A780C.8070609@portaone.com>
References: <200511141702.45491.nb_root@videotron.ca> <200511150542.34910.nb_root@videotron.ca> <4379BCEB.6030806@acidy.com> <200511150611.31743.nb_root@videotron.ca> <20051115183647.GA1783@schweikhardt.net> <20051115211418.GE1783@schweikhardt.net> <437A780C.8070609@portaone.com>
next in thread | previous in thread | raw e-mail | index | archive | help
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Nov 15, 2005, at 7:06 PM, Maxim Sobolev wrote: > I have better patch which extends detection mechanism, so that > along with size/mtime checksum of the compiler binary is stored as > well. Since compiler binary linked from the same sources/objects > will have the same checksum it allows ccache to be used OOB with > buildworld. Do you have any interest in putting it into the port? > > http://www.portaone.com/~sobomax/ccache.buildworld > Sure, I just have one question about the way this thing works. Would using this patch not make collision probability of the cache higher? I don't think this would be a huge problem, but it's not impossible to do with a 1,000,000~ file cache now. > -Maxim > > Jens Schweikhardt wrote: > >> Folks, >> # Put this in /usr/ports/devel/ccache/files/patch-nohash-size- >> mtime and >> # reinstall the port. Then export CCACHE_NOHASH_SIZE_MTIME=y >> during your >> # makes for buildworld and buildkernel. This melts my buildworld time >> # from 2700s (real@~100%CPU) to under 1000s and buildkernel from 800s >> # to 250s, so you gain about a factor 3 for ab-initio builds. Sweet! >> # # # --- ccache.c.orig Mon Oct 31 17:38:21 2005 >> # +++ ccache.c Mon Oct 31 17:52:31 2005 >> # @@ -331,8 +331,10 @@ >> # hash_string(str_basename(args->argv[0])); >> # } >> # # - hash_int(st.st_size); >> # - hash_int(st.st_mtime); >> # + if (!getenv("CCACHE_NOHASH_SIZE_MTIME")) { >> # + hash_int(st.st_size); >> # + hash_int(st.st_mtime); >> # + } >> [Rest of patch snipped ...] >> I just asked the devel/ccache maintainer to commit this patch and he >> promptly did (Thanks Michael Johnson, aka ahze!). So you only need >> this >> unless your ports tree is current as of now. >> Regards, >> Jens >> > > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current- > unsubscribe@freebsd.org" > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (Darwin) iD8DBQFDen28n4uqfTwEb9YRAjwUAJ439Lix6NizOpdPi201BnK2ghS9KwCfc7Lu AWa6Ybbl66Fqh4ZP1D2VRtc= =TJw0 -----END PGP SIGNATURE-----
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?3DE7B806-FB6B-4388-8FC7-E495F82E9D9B>