Sebastian,
On Tue, Jan 28, 2014 at 01:07:19PM +0100, Sebastian Sumpf wrote:
Thanks for your tests! But I don't like the 65 MBit/s thing! What is going on? Is this RX or TX?
Complete netperf output follows
---------------------------- TCP_STREAM ----------------------- spawn netperf-2.6.0 -H 10.0.0.65 -P 1 -v 2 -t TCP_STREAM -c -C -- -m 1024 MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 10.0.0.65 () port 0 AF_INET Recv Send Send Utilization Service Demand Socket Socket Message Elapsed Send Recv Send Recv Size Size Size Time Throughput local remote local remote bytes bytes bytes secs. 10^6bits/s % S % U us/KB us/KB
87380 16384 1024 10.02 65.59 34.95 -1.00 174.598 -1.249
Alignment Offset Bytes Bytes Sends Bytes Recvs Local Remote Local Remote Xfered Per Per Send Recv Send Recv Send (avg) Recv (avg) 8 8 0 0 82158592 1024.00 80233 8905.12 9226
Maximum Segment Size (bytes) 1448
calculation: overall bytes / size per packet / time = packets per second 82158592 Bytes / 1024 Bytes / 10.02 s = 8007 packets/s
! PERF: TCP_STREAM 65.59 MBit/s ok
---------------------------- TCP_MAERTS ----------------------- spawn netperf-2.6.0 -H 10.0.0.65 -P 1 -v 2 -t TCP_MAERTS -c -C -- -m 1024 MIGRATED TCP MAERTS TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 10.0.0.65 () port 0 AF_INET Recv Send Send Utilization Service Demand Socket Socket Message Elapsed Recv Send Recv Send Size Size Size Time Throughput local remote local remote bytes bytes bytes secs. 10^6bits/s % S % U us/KB us/KB
87380 16384 1024 10.00 543.35 39.06 -1.00 23.555 -0.151
Alignment Offset Bytes Bytes Recvs Bytes Sends Local Remote Local Remote Xfered Per Per Recv Send Recv Send Recv (avg) Send (avg) 8 8 0 0 679280808 13875.90 48954 16384.00 41474
Maximum Segment Size (bytes) 1448
calculation: overall bytes / size per packet / time = packets per second 679280808 Bytes / 1024 Bytes / 10.00 s = 66336 packets/s
! PERF: TCP_MAERTS 543.35 MBit/s ok
The manual states
TCP_STREAM It is quite simple, transferring some quantity of data from the system running netperf to the system running netserver. TCP_MAERTS A TCP_MAERTS (MAERTS is STREAM backwards) test is “just like” a TCP_STREAM test except the data flows from the netserver to the netperf.
So, the scenario is much slower if the Genode side is _receiving_.
Regards