[mvapich-discuss] (no subject)

[Nenad Vukicevic]

I get the same ptmalloc message on 2.1 and 2.2b.  I am running 2.1 and
2.2b on the same system, 4 nodes, one thread per node.

On Sat, Mar 5, 2016 at 12:22 PM, Mingzhe Li <li.2192 at osu.edu> wrote:
> Hi Nenad,
>
> Thanks for the note. We are not able to reproduce this issue on our systems.
> Both 2.1 and 2.2b give similar performance with your benchmarks. The 2.2b
> performance degradation issue might be coming due to ptmalloc issue you had
> indicated in a previous posting on your system. If you build 2.1 and 2.2b on
> the same system and run your benchmark, do you see the performance
> difference?
>
> Thanks,
> Mingzhe
>
> On Sat, Mar 5, 2016 at 1:17 AM, Nenad Vukicevic <nenad at intrepid.com> wrote:
>>
>> I am attaching a benchmark that shows one-sided Put/Get operations
>> being almost 100 times slower from the previous release.  Both version
>> are compiled the same way with -enable-fast=O3, however the same can
>> be shown for the debugged version.  Note that measurements of
>> accumulate operations are compatible across these two versions.
>>
>> From the attached results you can see that version 2.1 executes 1.4
>> million operations per second, while 2.2b does only close to 30
>> thousand operations.
>>
>> Any idea what might be the cause?
>>
>> Here are the outputs of the runs:
>>
>> RUNNING 2.1
>> nranks = 4
>> Main table size = 2^18 = 262144 words
>> Number of updates = 1048576
>> init(c= 0.0000 w= 0.0000) up(c= 0.7229 w= 0.7300) mil. up/sec= 1.4364
>> Found 6469 errors in 262144 locations (passed).
>>
>> RUNNING 2.2b
>> nranks = 4
>> Main table size = 2^18 = 262144 words
>> Number of updates = 1048576
>> init(c= 0.0000 w= 0.0000) up(c= 15.6167 w= 35.1200) mil. up/sec= 0.0299
>> Found 6478 errors in 262144 locations (passed).
>>
>> --
>> Nenad
>>
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>>
>



-- 
Nenad