Hi Davidlohr,
On 05/26/2013 10:50 PM, Davidlohr Bueso wrote:
In lack of getting my swingbench DSS environment back, I ran these
changes against the semop-multi program on my laptop. For 256 threads,
with Manfred's patchset the ops/sec suffers around -7.3%.
Could you also check the performance of only patch#1?
I fear that it might be slower than all 4 together.
With regards to semop-multi:
Is this the tool?
http://marc.info/?l=linux-kernel&m=136208613626892&q=p3
I think the logic is the wrong:
Locking a semaphore is substraction, unlocking adding.
Thus multiple tasks can run in parallel - and the task switch code is
never triggered.
Could you double check that the number of context switches matches the
output?
I usually use this tool:
http://marc.info/?l=linux-kernel&m=125038376609750
--
Manfred
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
