odp-on-isolated-cpu.sh : Initial script for odp isolationisol-v2

This script will use is-cpu-isolated.sh for cpu isolation,
get_isolation_duration for odp application and clear the cpusets.

For default case run cmd, ./common/scripts/odp-on-isolated-cpu.sh

it will run odp_isolation on isol cpu 1,2 and will create 2 threads
[p.s: assuming odp_isolation present in location /usr/local/bin]

Signed-off-by: santosh shukla <santosh.shukla@linaro.org>

1 files changed, 130 insertions, 0 deletions

diff --git a/common/scripts/odp-on-isolated-cpu.sh b/common/scripts/odp-on-isolated-cpu.sh
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+#!/bin/bash
+#
+# Author: Santosh Shukla <santosh.shukla@linaro.org>
+#
+# This script uses is-cpu-isolated.sh script (superset script) to isolate
+# a cpu or set of cpus (comma separated cpus list passed as argument $1 to
+# this script, Migrate possible kernel background tasks to boot cpu or other
+# non-isolated cpus)
+#
+# We record odp app isolation time using is-cpu-isolated.sh script "duration" argument.
+#
+# SCRIPT ARGUMENTS
+# $1: isolate cpu list comma separated
+# $2: Full odp command format like below
+#
+# "odp_l2fwd -i 0,2 -m 0 -c 2"
+# "odp_isolation -l 1,2"
+#
+# cut-n-paste below example to test the script :
+#./common/scripts/odp-on-isolated-cpu.sh 1,2 "odp_l2fwd -i 0,2 -m 0 -c 2" &
+#./common/scripts/odp-on-isolated-cpu.sh 1,2 "odp_isolation -l 1,2"
+#
+# note : it is assumed that odp bin copied to filesystem location /usr/local/bin
+#
+
+# Script arguments
+ISOL_CPUS="1,2"		# CPU to isolate, default 1,2. Comma-separated list of CPUs.
+ODP_CMD="1,2 odp_isolation -l 1,2"	# Default odp cmd to run
+
+# Global Var
+ODP_APP="odp_isolation"	# Default odp binary to run
+
+# Migrate thread to dplane cpu
+# argument - $1=thread_pid
+#            $2=isol cpu
+migrate_thread() {
+
+	cpu_mask=$2
+
+	# Move thread to isolated CPU
+	echo $1 > /dev/cpuset/dplane/cpu$cpu_mask/tasks
+}
+
+# get number of isol cpus
+get_cpu_count() {
+
+	cpu_count=0
+	for i in `echo $ISOL_CPUS | sed 's/,/ /g'`; do
+		let cpu_count++
+	done
+
+	echo $cpu_count
+}
+
+# Create odp setup
+odp_create_setup() {
+
+	# parse odp_ string and store them in variable
+	parsed=$(echo $ODP_CMD | cut -d " " -f 2-)
+
+	# get actual binary name out from big parsed string
+	ODP_APP=`echo $parsed | cut -f1 -d " "`
+
+	# Isolate cpu
+	$(pwd)/common/scripts/is-cpu-isolated.sh -q -c $ISOL_CPUS -t $ODP_APP -f "isolate"
+
+	# Run odp application
+	$parsed &
+
+	# get odp main() process pid
+	proc_pid=$!
+
+	# Few big application initialization takes more time to launch DP threads,
+	# this lead to NO thread pid entry found in /proc/$proc_pid/tasks.
+	# So better wait till application launches all the possible threads.
+	# for example : dpdk-l2fwd takes more time to launch thread.
+	while :
+	do
+		# loop until all thread pid found in /proc/$proc_pid/task
+		if [ $(ls /proc/$proc_pid/task | wc -l) -gt $(get_cpu_count) ];
+		then
+			break
+		fi
+	done
+
+	echo "$proc_pid"
+
+	# list odp thread pid in var thd_pid_list
+	thd_pid_list=$(ls /proc/$proc_pid/task | grep -v $proc_pid)
+
+	echo $thd_pid_list
+
+	# fill odp threads pid into arr[]
+	k=0
+	for i in `echo $thd_pid_list`; do
+		arr[k]=$i;
+		let k++
+	done
+
+	k=0
+	for i in `echo $ISOL_CPUS | sed 's/,/ /g'`; do
+		migrate_thread ${arr[$k]} $i
+		let k++
+	done
+
+	echo "DP Application isolation duration"
+	$(pwd)/common/scripts/is-cpu-isolated.sh -q -c $ISOL_CPUS -t $ODP_APP -f "duration"
+
+	echo "DP Application clear isol cpuset"
+	$(pwd)/common/scripts/is-cpu-isolated.sh -q -c $ISOL_CPUS -t $ODP_APP -f "clear"
+}
+
+# Parse argument
+[ $1 ] && ISOL_CPUS=$1
+
+# get full comand to parse
+if [ $# -gt 0 ]; then
+	ODP_CMD=$@
+fi
+
+## Check validity of arguments
+USAGE="Usage: $0 <CPUs to isolate (default 1), comma separated list> <odp_* binary full command in double quote>"
+
+if [ "$1" = "-h" -o "$1" = "--help" ]; then
+	echo $USAGE >&2
+	exit 0
+fi
+
+odp_create_setup
+