On 11/29/2012 04:24 AM, Gabriel VLASIU wrote:
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Wed, 28 Nov 2012, JD wrote:Date: Wed, 28 Nov 2012 15:37:54 -0700 From: JD <jd1008@xxxxxxxxx> To: Community support for Fedora users <users@xxxxxxxxxxxxxxxxxxxxxxx> User-Agent: Mozilla/5.0 (X11; Linux i686; rv:15.0) Gecko/20120911 Thunderbird/15.0.1 X-Spam-Status: No, score=-4.7 required=5.0 tests=AWL,BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_SIGNED,FREEMAIL_FROM,RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD,SPF_PASS,T_DKIM_INVALID autolearn=ham version=3.3.1 Subject: Multi-Threaded make While building the kernel from source RPM, I run the command ps -ef | grep make in another terminal, and I do see that 4 make processes are running, with each one building objects for a different kernel source directory. However, something else seems to be single threaded which is causing the huge delay in finishing kernel build. I found that when I run top to see the upper-most cpu consumers, I see only one cc1 process at the top. So I ran ps again to see how many cc1 processes there are. Always - just one cc1 process. I would expect to see anywhere from 1 to 4 cc1 processes at a time. But that is not the case. What is forcing only a single instance of cc1 at a time? I hope the devs can have a look at either the compiler tools or the make util.make is invoked from kernel.spec file like this: make -s ARCH=$Arch V=1 %{?_smp_mflags} $MakeTarget %{?sparse_mflags} make -s ARCH=$Arch V=1 %{?_smp_mflags} modules %{?sparse_mflags} || exit 1 where %{?_smp_mflags} is: 1 core : -j 1 2 cores: -j 2 4 cores: -j 4 ... You can see multiple make proccesses. But only 2 (in my case) do the real work: user1 22073 12810 0 13:13 pts/0 00:00:00 make -f scripts/Makefile.build obj=fs user1 24474 22073 0 13:15 pts/0 00:00:00 make -f scripts/Makefile.build obj=fs/cifs user1 24530 22073 0 13:15 pts/0 00:00:00 make -f scripts/Makefile.build obj=fs/coda Make proccess with pid 22073 only invoke two addititonal make proccesses which call cc1: user1 3617 3616 0 13:21 pts/0 00:00:00 /usr/libexec/gcc/x86_64-redhat-linux/4.7.2/cc1 -quiet -nostdinc .... user1 3627 3626 0 13:21 pts/0 00:00:00 /usr/libexec/gcc/x86_64-redhat-linux/4.7.2/cc1 -quiet -nostdinc ... One cc1 -> one core or you called make with -j 1. Gabriel
That does not make sense. I have a unicore!! An old Athlon64 3700+, and yet ps -ef shows up to 4 makes running at a time. -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
