Add a pktgen sample script of NUMA awareness

From: Robert Hoo <[email protected]>

It's hard to benchmark 40G+ network bandwidth using ordinary tools like iperf, netperf (see reference 1).
Pktgen, packet generator from Kernel sapce, shall be a candidate. I derived this NUMA awared irq affinity sample script from multi-queue sample02, successfully benchmarked 40G link. I think this can also be useful for 100G reference, though I haven't got device to test yet.

This script simply does:
Detect $DEV's NUMA node belonging.
Bind each thread (processor of NUMA locality) with each $DEV queue's irq affinity, 1:1 mapping.
How many '-t' threads input determines how many queues will be utilized.
If '-f' designates first cpu id, then offset in the NUMA node's cpu list.

Tested with Intel XL710 NIC with Cisco 3172 switch.

Referrences:
https://people.netfilter.org/hawk/presentations/LCA2015/net_stack_challenges_100G_LCA2015.pdf
http://www.intel.cn/content/dam/www/public/us/en/documents/reference-guides/xl710-x710-performance-tuning-linux-guide.pdf

Change log
v2:
Rebased to https://github.com/netoptimizer/network-testing/tree/master/pktgen
Move helper functions to functions.sh
More concise shell grammar usage
Take '-f' parameter into consideration. If the first CPU is designaed,
offset in the NUMA-aware CPU list.
Use err(), info() helper functions for such outputs.

Robert Hoo (2):
Add some helper functions
Add pktgen script: pktgen_sample06_numa_awared_queue_irq_affinity.sh

 pktgen/functions.sh                                | 44 ++++++++++
 ...tgen_sample06_numa_awared_queue_irq_affinity.sh | 97 ++++++++++++++++++++++
 2 files changed, 141 insertions(+)
 create mode 100755 pktgen/pktgen_sample06_numa_awared_queue_irq_affinity.sh

1.8.3.1