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authorSantosh Shukla <santosh.shukla@linaro.org>2014-08-19 21:53:01 +0530
committerViresh Kumar <viresh.kumar@linaro.org>2014-08-20 14:21:01 +0530
commit28322da9a22fce846d816eb9e7a0cd4e3297917b (patch)
treec943dc6d7c5f4399ef9cbe0d4d946d5c843321e3 /common
parent79127ad5e22376f4d6e6a1c9e33fce5a2b3e2e0d (diff)
odp-on-isolated-cpu.sh: Initial script for odp isolation
Script to run odp application on isolated cores. This script will isolate CPUs using is-cpu-isolated.sh, will then start odp threads on isolated CPUs. It will then get isolation time and clear cpusets using is-cpu-isolated.sh. Command to run ./odp-on-isolated-cpu.sh This will run odp threads on isolated cores 1 and 2. Change-Id: I5e7b4b7e0ffd3fc50b04987ed50835cc1c490bd8 Signed-off-by: Santosh Shukla <santosh.shukla@linaro.org> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Not-Tested-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'common')
-rwxr-xr-xcommon/scripts/odp-on-isolated-cpu.sh111
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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)
+#
+# We record odp app isolation time using is-cpu-isolated.sh script's "duration" argument.
+#
+# SCRIPT ARGUMENTS
+# $1: Comma separated list of CPUs to isolate
+# $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 :
+# ./odp-on-isolated-cpu.sh 1,2 "odp_l2fwd -i 0,2 -m 0 -c 2" &
+# ./odp-on-isolated-cpu.sh
+#
+# 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="odp_isolation -l 1,2" # Default odp cmd to run
+
+# 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 for isolation
+odp_isol_setup() {
+ # Get actual odp binary name out from $ODP_CMD
+ ODP_APP=`echo $ODP_CMD | cut -d " " -f1`
+
+ # Isolate cpu
+ $(pwd)/is-cpu-isolated.sh -q -c $ISOL_CPUS -t $ODP_APP -f "isolate"
+
+ # Run odp application
+ $ODP_CMD &
+
+ # Get odp main() process pid
+ proc_pid=$!
+
+ # Few big application initialization takes more time to launch DP threads,
+ # In that duration NO thread pid entry found in /proc/$proc_pid/tasks.
+ # So better wait till application launches all the possible threads
+ # and its pid reflected in /proc/$proc_pid/tasks.
+ # 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 odp main() process pid
+ echo "ODP process id: $proc_pid"
+
+ # List odp threads pid in variable thd_pid_list
+ thd_pid_list=$(ls /proc/$proc_pid/task | grep -v $proc_pid)
+
+ # Print thread pid list
+ echo "ODP threads: $thd_pid_list"
+
+ # Fill odp threads pid into arr[]
+ k=0
+ for i in $thd_pid_list; do
+ arr[k]=$i;
+ let k++
+ done
+
+ k=0
+ for i in `echo $ISOL_CPUS | sed 's/,/ /g'`; do
+ # Move thread to isolated CPU
+ echo ${arr[$k]} > /dev/cpuset/dplane/cpu$i/tasks
+ let k++
+ done
+
+ echo "DP Application isolation duration"
+ $(pwd)/is-cpu-isolated.sh -q -c $ISOL_CPUS -t $ODP_APP -f "duration"
+
+ echo "DP Application clear isol cpuset"
+ $(pwd)/is-cpu-isolated.sh -q -c $ISOL_CPUS -t $ODP_APP -f "clear"
+}
+
+## Check validity of arguments
+USAGE="Usage: $0 <CPUs to isolate (default 1,2), comma separated list> <odp_* binary full command in double quote (default odp_isolation)>"
+
+if [ "$1" = "-h" -o "$1" = "--help" ]; then
+ echo "$USAGE"
+ exit 0
+fi
+
+# Parse argument
+[ "$1" ] && ISOL_CPUS=$1
+[ "$2" ] && ODP_CMD=$2
+
+# Create odp setup for isolation
+odp_isol_setup