[zeromq-dev] PUB/SUB on an epgm socket ... and CPU usage?

Ladan Gharai lgharai at gmail.com
Fri Jun 10 22:10:41 CEST 2011

> But it seems even more of our loss problems were related to having set
> ZMQ_RATE to a rather high number (initially 950Mbps and then 500Mbps) - I
> have now reduced it to 100Mbps. I am now seeing the following behaviors:

   1. If I do send 100Mbps the receiver actually sees ~90Mbps. Is  10% the %
   allocated for  SPM/SPMR/RDATA/....?
   2. If I send 100 or say 90 Mbps CPU usage goes up to 100%! and with
   50Mbps it is around 50% ... is this normal?
      - this does not seem to happen with the ZMQ ipc or tcp sockets - but
      then those transports are not effected by ZMQ_RATE either

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