Hi Edwin,
I agree the problem is not ZMQ but it would be nice to achieve this with
ZMQ. Under Linux I do not have to do much tweaking except choose an
optimal buffer size for the ZMQ messages.
I have done benchmarks with iperf and simple file transfer and have
observed the same figures under Windows i.e. confirms it is not a
problem of ZMQ. The performance issue really seems to be inherent to
Windows. I have difficulty believing it is not possible with Windows.
But maybe I am wrong. The same tests under Linux give full bandwidth
performance. The hardware is the same in both cases (16 core machines
with GBs of memory).
I am hoping someone on the zeromq mailing list has managed to use all
the bandwidth with ZMQ on Windows with 10 Gbits/s and can tell me how
they did it ...
Best regards
Andy
On 07/03/2013 09:42 AM, Edwin van den Oetelaar wrote:
Hello Andy,
My guess is that your performance is limited by latency, not raw
bandwidth.
To saturate a 10GBps link you need to work hard.
You might need to increase the MTU (jumbo frames), tweak RX/TX buffer
size of the network stack.
You want to decrease the number of interrupts the card generates (by
streaming big chunks over the network).
Before you tried this with ZMQ have you tried simple file copy between
machines or running a tool like netperf (I know this is Linux).
Maybe ZMQ is not your problem yet, there could be many other reasons
why your performance is below expectations.
Greetings,
Edwin van den Oetelaar
On Wed, Jul 3, 2013 at 8:24 AM, Andy Gotz <[email protected]
<mailto:[email protected]>> wrote:
Dear all,
I am trying to use the full bandwidth of a 10 GBps link under
Windows 7
(32 bits) with zeromq. I do not seem to get above 1.5 GBps on
average. I
am using the remote_thr program provided as part of the zeromq
distribution which is using push-pull. The same zeromq program
uses the
full bandwidth under Linux.
Has anyone managed this under Windows 7? How did you do this? I have
read about various tweaks to be applied under Windows but none of them
helped so far. I would be interested in any/all tricks you applied.
Thanks in advance
Andy
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