On Thu, Jul 12, 2012 at 6:40 PM, Koen Kooi <k...@dominion.thruhere.net>wrote:
> > > 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? > > Exactly the same as -T 0. @g
_______________________________________________ Openembedded-core mailing list Openembedded-core@lists.openembedded.org http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
