Op 12 jul. 2012 om 17:29 heeft Andrei Gherzan <and...@gherzan.ro> het volgende geschreven:
> Hello, > > Koen suggested to add -T to xz commands. We have this option implemented in > our current version .1alpha. > > -T threads, --threads=threads > > > Specify the number of worker threads to use. Setting threads > to > > > a special value 0 makes xz use as many threads as there are > CPU > > > cores on the system. The actual number of threads can be > less > > > than threads if the input file is not big enough for > threading > > > with the given settings or if using more threads would > exceed > > > the memory usage limit. > > ------------------- > > Memory: 7.8 GiB > Processor:: Intel® Core™ i5-2540M CPU @ 2.60GHz × 4 > > File to compress: 1.9G > > xz -f -k -e -9 --check=crc32 (current configuration) > Memory: 673Mb > real 6m37.170s > user 6m35.389s > sys 0m0.884s > Compressed file size: 3.4Mb > > xz -f -k -e -9 -T 4 --check=crc32 > Memory: Cannot allocate memory > > xz -f -k -e -8 -T 4 --check=crc32 > Memory: 1.8G > real 3m24.462s > user 12m8.502s > sys 0m2.180s > Compressed file size: 3.4Mb > > xz -f -k -T 4 --check=crc32 (-e defaults to -6) > Memory: 471Mb > real 1m9.265s > user 4m8.972s > sys 0m0.944s > Compressed file size: 3.4Mb > > So my conclusion would be to use the default -e -6 with -T 4. Out of curiousity, what does -T0 give you? regards, koen > > @g _______________________________________________ Openembedded-core mailing list Openembedded-core@lists.openembedded.org http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
