Open MPI logo

Open MPI Development Mailing List Archives

  |   Home   |   Support   |   FAQ   |  

This web mail archive is frozen.

This page is part of a frozen web archive of this mailing list.

You can still navigate around this archive, but know that no new mails have been added to it since July of 2016.

Click here to be taken to the new web archives of this list; it includes all the mails that are in this frozen archive plus all new mails that have been sent to the list since it was migrated to the new archives.

From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2005-08-15 10:45:58

Is anyone having problems compiling the "linux" paffinity component?

It turns out that there are *3* different implementations of the Linux
system call sched_setaffinity() (and 3 different corresponding
prototypes -- #@$@#$%!!!). The differences seem to be loosely
categorized as:

1. implementation that was back-ported to 2.4 kernels (the one that is
listed in sched_setaffinity(2))
2. implementation in early 2.6 kernels
3. implementation in later 2.6 kernels

(although there seem to be some exceptions to the above categorization)

Plus, at least some 2.4 kernels seem to have broken aspects. Or is it
glibc? Who knows, who cares: in some places, the CPU_ZERO() macro
won't compile.

The default code path is for case #3. I have fixes for all cases ready
to commit, but they involve changes to that component's configure.m4,
which means making everyone re-run

Unless someone is actively running into compilation problems now, I was
planning until waiting until tonight to commit (observing the "try not
to cause people to re-run during the US work day" rule).

{+} Jeff Squyres
{+} The Open MPI Project