We continue to try to sort this out. Ignoring the errors for a moment, has anyone else experienced the performance slowdown quoted below between two EMACs?
If not, could anyone with two AM3517-baed platforms with the EMACs exposed please test this for us? We've run several tests between all the hardware we have available, and all perform like this. Connecting an EMAC to another EMAC and testing with iperf ("iperf -s" on one side, "iperf -c <IP>" on the other) shows the performance drop vs. connecting the same EMAC to nearly any other non-EMAC NIC and running the same test, even through the same infrastructure.
Our theory is that this could be a driver issue that when only 1 side has it, performance is fine. However, if both sides have the same issue, as in the case of EMAC to EMAC, the performance degrades significantly.
Thanks again for looking.
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
{{ DaVinci EMAC server, PC client }}
[ 4] local 192.168.2.192 port 5001 connected with 192.168.2.40 port 44452
[ ID] Interval Transfer Bandwidth
[ 4] 0.0-10.1 sec 114 MBytes 94.1 Mbits/sec
[ 5] local 192.168.2.192 port 5001 connected with 192.168.2.40 port 44459
[ 5] 0.0-10.1 sec 114 MBytes 94.0 Mbits/sec
[ 4] local 192.168.2.192 port 5001 connected with 192.168.2.40 port 44467
[ 4] 0.0-10.1 sec 113 MBytes 94.1 Mbits/sec
[ 5] local 192.168.2.192 port 5001 connected with 192.168.2.40 port 44474
[ 5] 0.0-10.1 sec 114 MBytes 94.1 Mbits/sec
[ 4] local 192.168.2.192 port 5001 connected with 192.168.2.40 port 44481
[ 4] 0.0-10.1 sec 114 MBytes 94.1 Mbits/sec
[ 5] local 192.168.2.192 port 5001 connected with 192.168.2.40 port 44488
[ 5] 0.0- 9.8 sec 110 MBytes 94.1 Mbits/sec
{{ same DaVinci EMAC server, still running, just changed to DaVinci EMAC client }}
[ 5] local 192.168.2.192 port 5001 connected with 192.168.2.74 port 37325
[ 5] 0.0-10.4 sec 73.9 MBytes 59.6 Mbits/sec
[ 6] local 192.168.2.192 port 5001 connected with 192.168.2.74 port 37326
[ 6] 0.0-10.8 sec 61.5 MBytes 47.8 Mbits/sec
[ 5] local 192.168.2.192 port 5001 connected with 192.168.2.74 port 37327
[ 5] 0.0-10.3 sec 64.6 MBytes 52.6 Mbits/sec
[ 6] local 192.168.2.192 port 5001 connected with 192.168.2.74 port 37328
[ 6] 0.0-10.0 sec 78.2 MBytes 65.5 Mbits/sec
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
