On 17/05/2010 00:23, Jirka Hladky wrote:
thanks a lot for the
I got access to 64 cores
system and you are indeed right! There is however an issue that taskset
does not support 0x80000000,0x0 format.
failed to parse CPU mask
Can I suggest an
enhancement to hwloc to support taskset format? taskset is currently
standard utility to set CPU affinity. Some colleagues of mine don't
want to switch to hwloc-bind yet, so supporting taskset format would be
great. You can certainly get around with
but it will make
Could you either add new
option --cpuset-taskset-compatible or perhaps change --cpuset output
to 0x8000000000000000 ?
What does taskset format look like when you want the 128th CPUs ? Does
it change if you switch from a 32bits architecture to a 64bits
We have chosen the aforementioned cpuset string format so that it does
not depend on the architecture. It makes XML files re-usable from one
machine to another for instance (which is exactly the main point of
exporting XML files, by the way).
If we want to support taskset format, I think adding an option to
lstopo wouldn't be enough since some people might want the same option
in hwloc-distrib or hwloc-calc. So we'd end up adding a new API
function. And then somebody else will ask for support for another
external tool and we'd add another dedicated API.
The real question is: why do you still want to use taskset ? hwloc-bind
should do everything taskset does, and it also support cpusets as
"node:2.proc:1" or "proc:23-35".