perfSONAR User Q&A and Other Discussion

[Aaron Brown <>]

Hey Gaetano,

Yeah, it looks like the terminology never got updated in the post-hook stuff after the —flip got added. There’s also a whole bunch of test parameters missing since it’s a latency test, and not a bandwidth test. I’ll add a ticket to the tracker about it.

Cheers,

Aaron

On Jan 26, 2015, at 11:25 AM, Gaetano Vocca <> wrote:

Hi all,

please help me understanding the correct way to read the command results (please be patient and spend a few seconds with me to read the details).

I want to measure the One Way delay between the machines 192.168.12.103 (local) and the remote 192.168.3.195. This latter cannot accept incoming connections so I use the –flip option which will reverse the connection phase.

The output is the following (please note that the statistics are, correctly, from 192.168.12.103 to 192.168.3.195)

 

root@raspia /etc/bwctld # bwping -T owamp --flip -c 192.168.3.195

bwping: Using tool: owamp

bwping: 20 seconds until test results available

 

RECEIVER START

Approximately 13.0 seconds until results available

 

--- owping statistics from [192.168.12.103]:5206 to [192.168.3.195]:5032 ---

SID:    c0a803c3d870e260312838b2f8b1bda2

first:  2015-01-26T16:57:22.354

last:   2015-01-26T16:57:30.813

10 sent, 0 lost (0.000%), 0 duplicates

one-way delay min/median/max = 24.7/25.1/25.3 ms, (err=4.12 ms)

one-way jitter = 0.2 ms (P95-P50)

Hops = 3 (consistently)

no reordering

 

I use a posthook to process results and there I get:

 

'<TEST_CONFIG>';

'tool: owamp';

'user: ';

'limit_class: root';

'start_time: 1422287835';

'is_host_sender: NO';

'tos: 0';

'client: 192.168.12.103';

'sender: 192.168.3.195';

'receiver: 192.168.12.103';

'duration: 15';

'use_udp: NO';

'bandwidth: 0';

'window: 0';

'len_buffer: 0';

'report_interval: 0';

'parallel_streams: 0';

'units:

'output_format:

'use_dynamic_window_sizing: NO';

'</TEST_CONFIG>';

 

Here I see that sender is 192.168.3.195 while it is actually the receiver of the test traffic, and viceversa for the receiver. Shouldn’t they be swapped?

 

Thank you

Gaetano