On 11/09/2012 04:49 PM, Dan Bradley wrote:
Hi all
I was thinking about the lack of support in Condor for setting cpu
affinity with partitionable slots in a useful way. We do this on our
non-partitionable slots to avoid the inevitable accidents where jobs
try to use the whole machine from a single-core slot. We'd like to be
able to do it on the partitionable slots.
My first question is whether cpu shares in cgroups make the above
use-case of cpu affinity obsolete.
Dan:
We certainly want to have a solution for cpu-limiting in a partitionable
slot world. One question is whether all of your clusters are ready for
cgroups? I was surprised to learn this week that LIGO has worked around
all of their Debian-related cgroup problems.
All things being equal, I would prefer to do this with cgroups, as I
don't like having to lock a job to a particular physical CPU.
-greg
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