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In future, using DPDK to operate at higher rates and buffer size set on per packet basis, traffic will fill the buffers more easily. T-rex generator can only achieve about 5 Gbps (based on recent testing, with T-rex core assignment = 4 cores in current configurations).
URL to PROX tool, which During the Plugfest, it was recommended to examine PROX tool's ability to characterize processor Interrupts. The PROX tool was installed on Pod12, Node 4. The PROX tool can examine interrupt effects on a heartbeat on each core. The current master can be accessed on gitub: https://github.com/opnfv/samplevnf/tree/master/VNFs/DPPD-PROX/
We obtained a PROX status display snapshot output for VSPERF Intel Pod 12, Node 4 (the Device Under Test, DUT, for the Long Duration and Cross-NUMA Node testing). This test used the configuration file in [opnfv@pod12-node4 ~]$ sudo ./prox -k -f ../config/irq.cfg
In this From PROX, which essentially measures the duration of a 1 nanosecond heartbeat, it is clear that some process is producing fairly frequent interrupts that cause delays in the 10-50 usec and 50-100usec range on core 6. Also, Core 11 has some interrupts in the 10-50usec range: it is important to check this when the VSPERF deployment is running. In the iPerf3 testing below, the Max MTU packets used have 1.2144 usec serialization delay, so a 10 usec interruption would affect approximately 12 frames.
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