From 7927d8b7cd2ef5a0d6573e09850ac69d9d4b9691 Mon Sep 17 00:00:00 2001
From: Peter Cai <peter.cai@uwaterloo.ca>
Date: Tue, 14 Feb 2023 14:34:20 -0500
Subject: [PATCH] Add support for experiments with kernel polling
---
experiments/memcached.shared.sh | 2 +-
experiments/memcached_qps_scan.sh | 7 ++++++-
run.sh | 9 +++++++++
tunings/kernel_polling.sh | 8 ++++++++
4 files changed, 24 insertions(+), 2 deletions(-)
create mode 100644 tunings/kernel_polling.sh
diff --git a/experiments/memcached.shared.sh b/experiments/memcached.shared.sh
index 57009ca..79027df 100644
--- a/experiments/memcached.shared.sh
+++ b/experiments/memcached.shared.sh
@@ -10,7 +10,7 @@ cleanup_mutilate() {
cleanup_memcached() {
echo "Killing memcached process"
- kill $MEMCACHED_PID
+ kill -INT $MEMCACHED_PID
}
start_memcached() {
diff --git a/experiments/memcached_qps_scan.sh b/experiments/memcached_qps_scan.sh
index e6add1c..4492f5a 100644
--- a/experiments/memcached_qps_scan.sh
+++ b/experiments/memcached_qps_scan.sh
@@ -23,7 +23,12 @@ pre_start() {
}
run_exp() {
- start_memcached
+ MEMCACHED_ARGS=""
+ if [ "$NAPI_LOCALITY" == "true" ]; then
+ MEMCACHED_ARGS="-N $THREADS"
+ fi
+
+ start_memcached $MEMCACHED_ARGS
start_mutilate
warmup
diff --git a/run.sh b/run.sh
index 09af22d..e54c9ce 100755
--- a/run.sh
+++ b/run.sh
@@ -26,6 +26,11 @@ while [[ $# -gt 0 ]]; do
shift
shift
;;
+ --extra-tuning)
+ EXTRA_TUNING="$2"
+ shift
+ shift
+ ;;
*)
break
;;
@@ -47,6 +52,9 @@ source "./experiments/$EXPERIMENT.sh"
pre_start
EXPERIMENT_NAME="$EXPERIMENT.$(uname -r)"
+if [ ! -z "$EXTRA_TUNING" ]; then
+ EXPERIMENT_NAME="$EXPERIMENT_NAME.$EXTRA_TUNING"
+fi
if [ ! -z "$EXPERIMENT_NAME_EXT" ]; then
EXPERIMENT_NAME="$EXPERIMENT_NAME.$EXPERIMENT_NAME_EXT"
fi
@@ -57,6 +65,7 @@ rm -rf "$DATA_OUT"
mkdir -p "$DATA_OUT"
source ./tunings/normalize_queues.sh
+[ ! -z "$EXTRA_TUNING" ] && source ./tunings/"$EXTRA_TUNING".sh
run_exp
diff --git a/tunings/kernel_polling.sh b/tunings/kernel_polling.sh
new file mode 100644
index 0000000..9da0c0e
--- /dev/null
+++ b/tunings/kernel_polling.sh
@@ -0,0 +1,8 @@
+if [ ! "$(uname -r)" == "5.15.79-peter" ]; then
+ echo "kernel polling only supported on patched kernel"
+ exit 1
+fi
+
+sysctl net.core.busy_poll=128
+# NAPI locality is needed for multi-threaded experiments
+NAPI_LOCALITY=true
--
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