Re: kernel-x64-smp-multiprocessor-time util problem

[Andi Kleen]

art@xxxxxxxxxx writes:

> 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?

user/sys accounts how much time the individual CPUs spent on your 
job. real counts how far your wall clock advanced.

Think about it. It's not that difficult to understand.

-Andi
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/