Pavel Shilovsky <piastryyy@xxxxxxxxx> writes:
> Thanks, now we have a great tool to start analyzing client latency.
> The more advanced step would be to start aggregate latency numbers and
> count percentiles (especially for specific commands).
As a side note, Wireshark can report some of this.
tshark -z smb2,srt -r dump.pcap
SMB2 SRT Statistics:
Filter: smb2.cmd
Index Commands Calls Min SRT Max SRT Avg SRT Sum SRT
5 Create 14759 0.000387 0.035268 0.001288 19.003702
6 Close 14713 0.000253 0.029454 0.000629 9.260241
14 Find 27468 0.000237 0.035798 0.000678 18.634827
16 GetInfo 983 0.000276 0.020349 0.000553 0.543487
SRT is Service Response time. You have RTT and other metrics as well. I
discovered this via Ronnie's SDC talk from years back [1] very good
reference. You can also graph all sorts of things, look at the slides 28
and on.
1: https://wiki.wireshark.org/Presentations?action=AttachFile&do=view&target=RonnieSahlberg_UsingWireshark.pdf
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Aurélien Aptel / SUSE Labs Samba Team
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