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From ed5045179836f32b60e5092c123e6f47da27beba Mon Sep 17 00:00:00 2001
From: John Kacur <jkacur@redhat.com>
Date: Wed, 9 Dec 2020 12:11:44 -0500
Subject: [PATCH 1/3] rt-tests: determine_maximum_mpps.sh: Add a menu to get
user settings.
Incorporate the functionality of the get_cpuinfo_mhz.sh script into
determine_maximum_mpps.sh so that get_cpuinfo_mhz.sh can be removed.
Currently determine_maximum_mpps.sh (part of queuelat) asks the user
to edit the PREAMBLE in the script to set the environment.
Get rid of this by creating a menu that allows the user the set these
variables from a menu when running the script.
Here is the output from running the script with the -h option
./src/queuelat/determine_maximum_mpps.sh -h
Usage:
determine_maximum_mpps.sh [OPTIONS]
-c cpulist
List of processors to run on. The default is processor 0
Numbers are separated by commas and may include ranges. Eg. 0,3,7-11
-m maxlat
maximum latency in nanoseconds. The default is 20000
if the maximum is exceeded, that run of queuelat quits
-n cycles
Estimated number of cycles it takes to process one packet
The default is 300
-f
Set the scheduling policy to SCHED_FIFO.
This is the default if not specified
-r
Set the scheduling policy to SCHED_RR.
-p priority
default priority = 1. Valid numbers are from 1 to 99
-h
help
print this help message and exit
Signed-off-by: John Kacur <jkacur@redhat.com>
diff --git a/src/queuelat/determine_maximum_mpps.sh b/src/queuelat/determine_maximum_mpps.sh
index f785147f1bbd..fdede472728c 100755
--- a/src/queuelat/determine_maximum_mpps.sh
+++ b/src/queuelat/determine_maximum_mpps.sh
@@ -6,12 +6,84 @@
# A script to determine the maximum mpps. Logic:
# Increase mpps in 0.5 units
#
-# NOTE: please set "PREAMBLE" to the command line you use for
-#
-PREAMBLE="taskset -c 2 chrt -f 1"
MAXLAT="20000"
CYCLES_PER_PACKET="300"
OUTFILE=/usr/tmp/outfile
+PRIO=1
+CPULIST=0
+SCHED=""
+
+usage()
+{
+ echo "Usage:"
+ echo "$(basename $0) [OPTIONS]"
+ echo
+ echo "-c cpulist"
+ echo " List of processors to run on. The default is processor 0"
+ echo " Numbers are separated by commas and may include ranges. Eg. 0,3,7-11"
+ echo "-m maxlat"
+ echo " maximum latency in nanoseconds. The default is 20000"
+ echo " if the maximum is exceeded, that run of queuelat quits"
+ echo "-n cycles"
+ echo " Estimated number of cycles it takes to process one packet"
+ echo " The default is 300"
+ echo "-f"
+ echo " Set the scheduling policy to SCHED_FIFO."
+ echo " This is the default if not specified"
+ echo "-r"
+ echo " Set the scheduling policy to SCHED_RR".
+ echo "-p priority"
+ echo " default priority = 1. Valid numbers are from 1 to 99"
+ echo "-h"
+ echo " help"
+ echo " print this help message and exit"
+ exit
+}
+
+get_cpuinfo_mhz()
+{
+ grep "cpu MHz" /proc/cpuinfo | cut -f 3 -d " " | sort -rn | head -n1
+}
+
+# Check that the scheduling policy hasn't already been set
+# Exit with an error message if it has
+check_sched()
+{
+ if [ "${SCHED}" != "" ]; then
+ echo "Specify -f or -r, but not both"
+ usage
+ fi
+}
+
+# Process command line options
+while getopts ":c:frp:m:n:h" opt; do
+ case ${opt} in
+ c ) CPULIST="${OPTARG}" ;;
+ m ) MAXLAT="${OPTARG}" ;;
+ n ) CYCLES_PER_PACKET="${OPTARG}" ;;
+ f ) check_sched; SCHED="-f" ;;
+ r ) check_sched; SCHED="-r" ;;
+ p ) PRIO="${OPTARG}" ;;
+ h ) usage ;;
+ * ) echo "no such option"; usage ;;
+ esac
+done
+
+shift $((OPTIND -1 ))
+
+# If the user hasn't specified a scheduling policy
+# then set it to the default SCHED_FIFO
+if [ "${SCHED}" == "" ]; then
+ SCHED="-f"
+fi
+
+# Error checking that the user entered a priority between 1 and 99
+if [[ "${PRIO}" -lt "1" ]] || [[ "${PRIO}" -gt "99" ]]; then
+ echo "PRIO must be a number between 1 and 99"
+ usage
+fi
+
+PREAMBLE="taskset -c ${CPULIST} chrt ${SCHED} ${PRIO}"
echo "Determining maximum mpps the machine can handle"
echo "Will take a few minutes to determine mpps value"
@@ -21,7 +93,7 @@ for mpps in $(seq 3 3 50); do
echo testing "$mpps" Mpps
OUTFILE=$(mktemp)
- $PREAMBLE queuelat -m $MAXLAT -c $CYCLES_PER_PACKET -f "$(sh get_cpuinfo_mhz.sh)" -p "$mpps" -t 30 > "$OUTFILE"
+ $PREAMBLE queuelat -m $MAXLAT -c $CYCLES_PER_PACKET -f "$(get_cpuinfo_mhz)" -p "$mpps" -t 30 > "$OUTFILE"
exceeded=$(grep exceeded "$OUTFILE")
if [ ! -z "$exceeded" ]; then
@@ -37,7 +109,7 @@ for mpps in $(seq $first_mpps -1 3); do
echo testing "$mpps" Mpps
OUTFILE=$(mktemp)
- $PREAMBLE queuelat -m $MAXLAT -c $CYCLES_PER_PACKET -f "$(sh get_cpuinfo_mhz.sh)" -p "$mpps" -t 30 > "$OUTFILE"
+ $PREAMBLE queuelat -m $MAXLAT -c $CYCLES_PER_PACKET -f "$(get_cpuinfo_mhz)" -p "$mpps" -t 30 > "$OUTFILE"
exceeded=$(grep exceeded "$OUTFILE")
if [ -z "$exceeded" ]; then
@@ -54,7 +126,7 @@ for mpps in $(seq "$second_mpps" 0.3 $first_mpps); do
echo testing "$mpps" Mpps
OUTFILE=$(mktemp)
- $PREAMBLE queuelat -m $MAXLAT -c $CYCLES_PER_PACKET -f "$(sh get_cpuinfo_mhz.sh)" -p "$mpps" -t 30 > "$OUTFILE"
+ $PREAMBLE queuelat -m $MAXLAT -c $CYCLES_PER_PACKET -f "$(get_cpuinfo_mhz)" -p "$mpps" -t 30 > "$OUTFILE"
exceeded=$(grep exceeded "$OUTFILE")
if [ ! -z "$exceeded" ]; then
@@ -71,7 +143,7 @@ for mpps in $(seq "$third_mpps" -0.1 3); do
echo testing "$mpps" Mpps
OUTFILE=$(mktemp)
- $PREAMBLE queuelat -m $MAXLAT -c $CYCLES_PER_PACKET -f "$(sh get_cpuinfo_mhz.sh)" -p "$mpps" -t 30 > "$OUTFILE"
+ $PREAMBLE queuelat -m $MAXLAT -c $CYCLES_PER_PACKET -f "$(get_cpuinfo_mhz)" -p "$mpps" -t 30 > "$OUTFILE"
exceeded=$(grep exceeded "$OUTFILE")
if [ -z "$exceeded" ]; then
@@ -90,7 +162,7 @@ while [ $queuelat_failure == 1 ]; do
echo "$mpps Mpps"
for i in $(seq 1 10); do
- $PREAMBLE queuelat -m $MAXLAT -c $CYCLES_PER_PACKET -f "$(get_cpuinfo_mhz.sh)" -p "$mpps" -t 30 > "$OUTFILE"
+ $PREAMBLE queuelat -m $MAXLAT -c $CYCLES_PER_PACKET -f "$(get_cpuinfo_mhz)" -p "$mpps" -t 30 > "$OUTFILE"
exceeded=$(grep exceeded "$OUTFILE")
if [ ! -z "$exceeded" ]; then
@@ -113,7 +185,7 @@ while [ $queuelat_failure == 1 ]; do
echo -n "Starting 10 minutes run with "
echo "$mpps Mpps"
- $PREAMBLE queuelat -m $MAXLAT -c $CYCLES_PER_PACKET -f "$(get_cpuinfo_mhz.sh)" -p "$mpps" -t 600 > "$OUTFILE"
+ $PREAMBLE queuelat -m $MAXLAT -c $CYCLES_PER_PACKET -f "$(get_cpuinfo_mhz)" -p "$mpps" -t 600 > "$OUTFILE"
exceeded=$(grep exceeded "$OUTFILE")
if [ ! -z "$exceeded" ]; then
--
2.26.2
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