Re: communication pattern causes corrupted data

Greg Lindahl <[email protected]> Tue, 25 Mar 2003 15:06:35 -0800
Newsgroups gmane.network.myrinet.general
Message-ID <[email protected]>
On Tue, Mar 25, 2003 at 02:12:44PM -0800, Joshua J. England wrote:

> I did a full recompile of the redhat 7.1 glibc explicitly setting
> host=alphaev56-unknown-linux-gnu.  Just to be sure, I also recompiled
> gm-1.6.3 and mpich-gm-1.2.4..8a.
> 
> The problem still occurs.

Hm. Did you check to see if memcopy and friends actually use byte
accesses for the ev56 in that old glibc?

An alternate test would be to pad your buffer variables with an extra
8 bytes. If the problem Dave mentions is present, then the corruption
won't touch the actual data.

-- greg