Im not saying it is broad casting as i dont know your topology and load... epgm is broadcast by switches , tcp is not. , only hubs.
Ben On Tue, Oct 30, 2012 at 11:10 AM, Rohan Bedarkar <r_bedar...@yahoo.com>wrote: > Happens only for epgm and not for TCP. Why would that be? > > Sent from my iPhone > > On Oct 29, 2012, at 9:14 PM, Bennie Kloosteman <bkloo...@gmail.com> wrote: > > Ethernet contention ? It is broadcasting > > On Tue, Oct 30, 2012 at 3:19 AM, Rohan Bedarkar <r_bedar...@yahoo.com>wrote: > >> Steve, >> >> I found something interesting. ZMQ roundtrip over epgm drops suddenly at >> one point.. Thoughts? >> ........ >> ...... >> ... >> 88: 143us >> 89: 144us >> 90: 145us >> 91: 146us >> 92: 147us >> 93: 141us >> 94: 158us >> 95: 879us <--------------- >> 96: 4972us >> 97: 4966us >> 98: 4969us >> 99: 4969us >> 100: 5049us >> 101: 5049us >> 102: 5048us >> 103: 5048us >> 104: 5051us >> 105: 5048us >> 106: 5048us >> 107: 5048us >> 108: 5050us >> >> -- >> >> Rohan Bedarkar >> MS, Computer Science >> University of Chicago >> roh...@cs.uchicago.edu >> >> >> >> >> >> ------------------------------ >> *From:* Rohan Bedarkar <r_bedar...@yahoo.com> >> *To:* ZeroMQ development list <zeromq-dev@lists.zeromq.org> >> *Sent:* Thursday, October 25, 2012 12:32 PM >> >> *Subject:* Re: [zeromq-dev] epgm performance numbers >> >> Ok. Let me start with iPerf.. >> >> Will update this thread with results as I think it will be really useful >> to others as well. >> >> >> -- >> >> Rohan Bedarkar >> MS, Computer Science >> University of Chicago >> roh...@cs.uchicago.edu >> >> >> >> >> >> ------------------------------ >> *From:* Steven McCoy <steven.mc...@miru.hk> >> *To:* Rohan Bedarkar <r_bedar...@yahoo.com>; ZeroMQ development list < >> zeromq-dev@lists.zeromq.org> >> *Sent:* Thursday, October 25, 2012 12:17 PM >> *Subject:* Re: [zeromq-dev] epgm performance numbers >> >> On 25 October 2012 13:04, Rohan Bedarkar <r_bedar...@yahoo.com> wrote: >> >> Unfortunately no luck. Just tried varying the multicast rates on both >> sides anywhere between 1000 to 10000 to even 1000000 but no change. Its a >> little counterintuitive that lowering rates can help especially if HWM is >> sufficiently high. I am using 32 bit SuSe on one side and 64 bit SuSe on >> the other side. >> >> Are there any configs that I might have overlooked? >> >> Both my repeater application and originating application are very light >> so I doubt these latencies are anywhere in there. If I simply switch to TCP >> the performance is really good. >> >> >> First set a baseline with iperf. >> >> Second try the performance tools in ZeroMQ. >> >> Third try the performance tools in OpenPGM. >> >> Due to the high watermark you have set in ZeroMQ it might be an issue >> previously raised: application level throttling is required, although it >> need only be coarse grained. The problem with high speed pushing into >> ZeroMQ means you saturate the memory bus queuing up everything and slow the >> entire system down causing performance to be significantly worse. >> >> Reliable multicast is not easy™ >> >> -- >> Steve-o >> >> _______________________________________________ >> zeromq-dev mailing list >> zeromq-dev@lists.zeromq.org >> http://lists.zeromq.org/mailman/listinfo/zeromq-dev >> >> >> >> _______________________________________________ >> zeromq-dev mailing list >> zeromq-dev@lists.zeromq.org >> http://lists.zeromq.org/mailman/listinfo/zeromq-dev >> >> >> >> _______________________________________________ >> zeromq-dev mailing list >> zeromq-dev@lists.zeromq.org >> http://lists.zeromq.org/mailman/listinfo/zeromq-dev >> >> > _______________________________________________ > zeromq-dev mailing list > zeromq-dev@lists.zeromq.org > http://lists.zeromq.org/mailman/listinfo/zeromq-dev > > > _______________________________________________ > zeromq-dev mailing list > zeromq-dev@lists.zeromq.org > http://lists.zeromq.org/mailman/listinfo/zeromq-dev > >
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