On Thu, Jul 12, 2012 at 1:58 PM, Koen Kooi <k...@dominion.thruhere.net> wrote: > Any volunteers to test this on a system with >4 real cores?
How do you get the memory usage bit? -M > > Op 12 jul. 2012, om 20:13 heeft Andrei Gherzan het volgende geschreven: > >> 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 0. >> >> The following changes since commit 90ad663909c0c8a405b22a510c9f957007d02669: >> >> upstream_tracking: update boost (2012-07-09 17:21:38 +0100) >> >> are available in the git repository at: >> >> git://git.yoctoproject.org/poky-contrib ag/xz >> http://git.yoctoproject.org/cgit.cgi/poky-contrib/log/?h=ag/xz >> >> Andrei Gherzan (3): >> image_types.bbclass: Fix COMPRESS_CMD for xz to redirect compressed >> data to file >> image_types.bbclass: Add XZ variable to set number of threads to be >> used while compressing >> image_types.bbclass: Default XZ_COMPRESSION_LEVEL to -e -6 >> >> meta/classes/image_types.bbclass | 5 +++-- >> 1 file changed, 3 insertions(+), 2 deletions(-) >> >> -- >> 1.7.9.5 >> > > > _______________________________________________ > Openembedded-core mailing list > Openembedded-core@lists.openembedded.org > http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core _______________________________________________ Openembedded-core mailing list Openembedded-core@lists.openembedded.org http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
