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We can get these statistics on a per-second basis, from a TCP socket - there is syntax to request these stats. (also -k command, Xavier will share scripts which are better).
During the discussion at Plugfest, it was also proposed that the characteristics of frame loss over time may suggest the source:
- an isolated burst of consecutive loss seems likely to originate from a relatively long-lived interrupt.
- more frequent loss bursts may result from the traffic level exceeding resource limitations.
Loss characteristics are a topic for further investigation, and likely expansion of the ETSI NFV specification TST009, clause 11.
Next steps:
- OVS-DPDK with isolcpu rcu_nocbs
- and taskset the iPerf process to qa core with no interrupts.
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