netperf

[Sebastian Sumpf]

On 01/28/2014 01:20 PM, Christian Helmuth wrote:
> 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_.

Without cursing: This is no good! I will look into that!

Sebastian


-- 
Sebastian Sumpf
Genode Labs

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