Wenbo Zhang ethercflow

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Focusing

Nothing is true. Everything is possible.

ethercflow / cpu_tenancy.py

Created July 24, 2018 06:32 — forked from siddontang/cpu_tenancy.py

A tool to show how the thread runs on different CPUs

	#!/usr/bin/python

	import sys
	import re

	# perf record -F 99 -p $1 -e "sched:sched_stat_runtime" -a -- sleep 20
	# perf script -F comm,pid,tid,cpu,time \| python cpu_tenancy.py
	#
	# time-monitor-wo 79618/79634 [007] 11994704.695317:
	# grpc-server-1 79618/79954 [006] 11994704.717969:

ethercflow / delay.sh

Created May 23, 2018 08:37 — forked from digilist/delay.sh

Delaying network traffic to a specific IP

	#!/bin/bash

	interface=lo
	ip=10.0.0.1
	delay=100ms

	tc qdisc add dev $interface root handle 1: prio
	tc filter add dev $interface parent 1:0 protocol ip prio 1 u32 match ip dst $ip flowid 2:1
	tc qdisc add dev $interface parent 1:1 handle 2: netem delay $delay