Messages in this thread | | | Subject | Re: kernel-x64-smp-multiprocessor-time util problem | From | Bernd Petrovitsch <> | Date | Wed, 21 Jun 2006 10:33:52 +0200 |
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On Wed, 2006-06-21 at 03:17 -0500, art@usfltd.com wrote: > Quoting Bernd Petrovitsch <bernd@firmix.at>: > > On Mon, 2006-06-19 at 18:04 -0500, art@usfltd.com wrote: > >> on dual core amd-athlon under 64bit-smp core > >> > >> kernel compilation time: > >> > >> time make -j 8 > >> ... > >> LD [M] sound/usb/snd-usb-lib.ko > >> LD [M] sound/usb/usx2y/snd-usb-usx2y.ko > >> > >> real 18m0.948s > >> user 26m6.270s ------bad > >> sys 4m22.256s ------?bad > >> [xxx@localhost linux-2.6.17]$ > >> --- real-clock time is ~18 min -- user and system time doubled? > > > > How many virtual CPUs (i.e. HT is "2 CPUs") do you have in that machine? [...] > 1 CPU 2 cores = 2 (amd athlon x2 4200+)
What does "real" really measure? What does "user" and "sys" really measure?
Bernd -- Firmix Software GmbH http://www.firmix.at/ mobil: +43 664 4416156 fax: +43 1 7890849-55 Embedded Linux Development and Services
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