Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hi Everyone,
After digging around more on my server performance issue it looks like
the latency the NICs I.m using are giving a big part of the problem.
Using netperf I.m seeing a round trip latency on the network of about 70
microseconds. This seems quite high for some back-to-back 10Gbe NICs.
Can others post some latency numbers for 10Gbe networks and what brand
of NIC their using?
# netperf -t TCP_RR -H <targethost> -l 60 -C -c -v 2 -- -r 512,512 -s
256K -S 256K
Local /Remote
Socket Size Request Resp. Elapsed Trans. CPU CPU S.dem
S.dem
Send Recv Size Size Time Rate local remote local
remote
bytes bytes bytes bytes secs. per sec % S % S us/Tr
us/Tr
524288 524288 512 512 60.00 14143.30 1.56 1.55 8.849
8.772
524288 524288
Alignment Offset RoundTrip Trans Throughput
Local Remote Local Remote Latency Rate 10^6bits/s
Send Recv Send Recv usec/Tran per sec Outbound Inbound
8 0 0 0 70.705 14143.299 57.931 57.931
Thanks,
Morey