Re: [PATCH] pack-objects: Add runtime detection of online CPU's

From: Bert Wesarg <bert.wesarg@googlemail.com>
Date: Feb 12, 2008, 11:18 UTC
Message-ID: <36ca99e90802120318y5099b06cta3f8488dc758f6@mail.gmail.com>
In-Reply-To: <47B156CD.1010209@op5.se>

Hi,

On Feb 12, 2008 9:20 AM, Andreas Ericsson <ae@op5.se> wrote:

Show 7 quoted lines

> +#ifdef THREADED_DELTA_SEARCH
> +# ifdef _SC_NPROCESSORS_ONLN
> +       long ncpus;
> +
> +       if ((ncpus = (long)sysconf(_SC_NPROCESSORS_ONLN)) > 0)
> +               return (int)ncpus;
> +# else

I can't find the right pointer, but for linux it would be more usable to use sched_getaffinity(). Than you can do thinks like this:

$ taskset 0x3 git gc ...

and you will get 2 cpus, even 4 are online.

Bert