Re: [ovs-dev] [PATCH v10 3/3] dpif-netdev: Detection and logging of suspicious PMD iterations

> > I would not say this is expected behavior. > > > > It seems that you are executing on a somewhat slower system (tsc clock > > seems to be 100/us = 0.1 GHz) and that, even with only 5 > lines logged before and after, the logging output is causing so much slow > down of the PMD that it

Re: [ovs-dev] [PATCH v10 3/3] dpif-netdev: Detection and logging of suspicious PMD iterations

On 11.04.2018 20:45, Jan Scheurich wrote: > Hi Ilya, > > I would not say this is expected behavior. > > It seems that you are executing on a somewhat slower system (tsc clock seems > to be 100/us = 0.1 GHz) and that, even with only 5 lines logged before and > after, the logging output is

Re: [ovs-dev] [PATCH v10 3/3] dpif-netdev: Detection and logging of suspicious PMD iterations

Hi Ilya, I would not say this is expected behavior. It seems that you are executing on a somewhat slower system (tsc clock seems to be 100/us = 0.1 GHz) and that, even with only 5 lines logged before and after, the logging output is causing so much slow down of the PMD that it continues to

Re: [ovs-dev] [PATCH v10 3/3] dpif-netdev: Detection and logging of suspicious PMD iterations

> This patch enhances dpif-netdev-perf to detect iterations with suspicious > statistics according to the following criteria: > > - iteration lasts longer than US_THR microseconds (default 250). > This can be used to capture events where a PMD is blocked or > interrupted for such a period of

Re: [ovs-dev] [PATCH v10 3/3] dpif-netdev: Detection and logging of suspicious PMD iterations

I see following behaviour: 1. Configure low -us (like 100) 2. After that I see many logs about suspicious iterations (expected). 2018-03-27T13:58:27Z|03574|pmd_perf(pmd7)|WARN|Suspicious iteration (Excessive total cycles): tsc=520415762246435 duration=106 us

Re: [ovs-dev] [PATCH v10 3/3] dpif-netdev: Detection and logging of suspicious PMD iterations

Acked-by: Billy O'Mahony > -Original Message- > From: Jan Scheurich [mailto:jan.scheur...@ericsson.com] > Sent: Sunday, March 18, 2018 5:55 PM > To: d...@openvswitch.org > Cc: ktray...@redhat.com; Stokes, Ian ; > i.maxim...@samsung.com; O

[ovs-dev] [PATCH v10 3/3] dpif-netdev: Detection and logging of suspicious PMD iterations

This patch enhances dpif-netdev-perf to detect iterations with suspicious statistics according to the following criteria: - iteration lasts longer than US_THR microseconds (default 250). This can be used to capture events where a PMD is blocked or interrupted for such a period of time that