Hi,
On Fri, Nov 09, 2012 at 02:45:45PM +0100, Michael Stahl wrote:
please argue more convincingly why we need this.
I just tried to get convincing numbers with a reproducable scenario, but cant.
:/
But I an certain to have seen cache misses going up during a build when they
shouldnt, as since Rene saw that too, I dont think I am seeing phantoms.
Another sideeffect of the measurement is that we know that dep-checking costs
~30 seconds for a dev-install.
Anyway, I will try to hunt down that ghost next time I see it.
Best,
Bjoern
These are my results (make clean && dev-install, measuring the second run):
with deps:
cache hit (direct) 8663
cache hit (preprocessed) 41
cache miss 8672
called for link 880
called for preprocessing 164
compile failed 30
preprocessor error 20
bad compiler arguments 18
unsupported source language 2
autoconf compile/link 206
unsupported compiler option 1292
no input file 148
files in cache 25955
cache size 1.2 Gbytes
max cache size 6.0 Gbytes
3 min 51 sec
without deps:
cache directory /home/bjoern/.ccache_upstream-master/
cache hit (direct) 8692
cache hit (preprocessed) 12
cache miss 8672
called for link 880
called for preprocessing 164
compile failed 30
preprocessor error 20
bad compiler arguments 18
unsupported source language 2
autoconf compile/link 206
unsupported compiler option 1292
no input file 140
files in cache 17472
cache size 916.8 Mbytes
max cache size 6.0 Gbytes
cache directory /home/bjoern/.ccache_upstream-master/
cache hit (direct) 8692
cache hit (preprocessed) 12
cache miss 8672
called for link 880
called for preprocessing 164
compile failed 30
preprocessor error 20
bad compiler arguments 18
unsupported source language 2
autoconf compile/link 206
unsupported compiler option 1292
no input file 140
files in cache 17472
cache size 916.8 Mbytes
max cache size 6.0 Gbytes
3 min 20 sec
build with empty ccache:
18 min
./autogen.sh --disable-mozilla --disable-binfilter --disable-odk
--disable-postgresql-sdbc --disable-gnome-vfs --without-help
--without-myspell-dicts
--with-external-tar=/home/bjoern/.jenkins/jobs/upstreamtarballs/workspace
--disable-zenity --with-system-libs --without-doxygen --without-system-vigra
--without-system-sane --without-system-orcus --disable-extensions
--disable-ext-report-builder --disable-scripting-beanshell
--with-junit=/usr/share/junit-4/lib/junit.jar
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