On Tue, 2012-05-29 at 15:40 +0200, Enrico Scholz wrote: > Richard Purdie > <[email protected]> > writes: > > > Currently, ccache is used if it is present. When building from scratch > > it gives no performance improvement > > Here, I have a 10% cache hit ratio in a scratch build: > > cache hit (direct) 2841 > cache hit (preprocessed) 1370 > cache miss 39957 > called for link 3369 > called for preprocessing 3207 > multiple source files 8 > compile failed 2531 > preprocessor error 432 > couldn't find the compiler 111 > bad compiler arguments 468 > unsupported source language 532 > autoconf compile/link 6613 > unsupported compiler option 132 > no input file 2919 > files in cache 94205 > cache size 2.0 Gbytes > max cache size 3.0 Gbytes >
That's good data, thanks for sharing it. In any measurement I've made, it doesn't seem to help the wall time for the build though :( We're not removing the ability to use ccache, just changing the way its enabled which all things considered I still think is a good move... Cheers, Richard _______________________________________________ Openembedded-core mailing list [email protected] http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
