On Feb 9, 2015, at 08:16, John Baldwin <j...@freebsd.org> wrote: > > On Monday, February 09, 2015 06:20:35 AM Rui Paulo wrote: >> Author: rpaulo >> Date: Mon Feb 9 06:20:34 2015 >> New Revision: 278433 >> URL: https://svnweb.freebsd.org/changeset/base/278433 >> >> Log: >> Merge xz 5.2.0. >> >> This brings support for multi-threaded compression. This brings close >> N times faster compression where N is the number of CPU cores. >> Because of this, liblzma now depends on libthr. >> >> Soon libarchive will be modified to use the new lzma API. >> >> Thanks to antoine@ for the exp-run. > > It looks like this uses hw.ncpu to determine the number of cores. Can you > make this cpuset friendly by querying the current process's CPU mask and > counting the cores it contains instead? > > Somethign like: > > cpuset_t set; > > cpuset_getaffinity(CPU_LEVEL_WHICH, CPU_WHICH_PID, -1, &set, sizeof(set)); > > (I have a CPU_COUNT() macro I should commit that will then let you do:) > > ncpus = CPU_COUNT(&set);
Yes, makes sense. I'll wait for CPU_COUNT(). -- Rui Paulo _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
