Add sweep delay script for cas_lockref

The new lh_sweepdelay_cfg.yaml is used for sweeping CAS latency from 0us to
32us. Using this script, we can easily find potential CAS latency bottlenecks
for different core count and CAS delay time.

Signed-off-by: Yangzheng Bai <Yangzheng.Bai@arm.com>

Author: Yangzheng Bai

benchmarks/lockhammer/scripts/lh_sweepdelay_cfg.yaml

@@ -0,0 +1,157 @@
+# Copyright (c) 2018, ARM Limited. All rights reserved.
+#
+# SPDX-License-Identifier:    BSD-3-Clause
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# Redistributions of source code must retain the above copyright notice, this
+# list of conditions and the following disclaimer.
+#
+# Redistributions in binary form must reproduce the above copyright notice, this
+# list of conditions and the following disclaimer in the documentation and/or
+# other materials provided with the distribution.
+#
+# Neither the name of ARM Limited nor the names of its contributors may be used
+# to endorse or promote products derived from this software without specific
+# prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+# TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# The views and conclusions contained in the software and documentation are those
+# of the authors and should not be interpreted as representing official policies,
+# either expressed or implied, of this project.
+
+
+## Global Settings
+globalcfg:
+    execdir: ../build
+    logfile: lockhammer.csv
+
+
+## Sweep Test Settings
+#
+# Common assumptions for sweep delay test:
+# The system should be able to handle CAS workload at any delay.
+# Using eBPF, we find that Nginx lockref inter-arrival delay is less than 32us,
+# and lockref_get to lockref_put_return delay is less than 2us. Therefore we
+# create this script to sweep <32us delay using -p parameter and keep -c
+# parameter at 1us because eBPF intrinsic overhead is about 1us. We also find
+# the ratio between -c and -p is relatively fixed, e.g. 1:8 ~ 1:16. We choose
+# 1:9 for the last case (-c=3000ns, -p=28000ns).
+#
+##
+sweeptest:
+    enabled: True
+    safemode: True
+    cmd:
+        - lh_cas_lockref
+    cmd_aarch64:
+    cmd_x86_64:
+    repeat: 9
+    sweepargu: t
+    argumax: 0
+    skipsince: 48
+    skipstep: 8
+    argulist:
+        - a: 5000
+          c: 0ns
+          p: 0ns
+          o: lstopo
+        - a: 5000
+          c: 200ns
+          p: 0ns
+          o: lstopo
+        - a: 5000
+          c: 1000ns
+          p: 0ns
+          o: lstopo
+        - a: 5000
+          c: 200ns
+          p: 1000ns
+          o: lstopo
+        - a: 5000
+          c: 1000ns
+          p: 1000ns
+          o: lstopo
+        - a: 5000
+          c: 1000ns
+          p: 2000ns
+          o: lstopo
+        - a: 5000
+          c: 1000ns
+          p: 3000ns
+          o: lstopo
+        - a: 5000
+          c: 1000ns
+          p: 4000ns
+          o: lstopo
+        - a: 5000
+          c: 1000ns
+          p: 5000ns
+          o: lstopo
+        - a: 5000
+          c: 1000ns
+          p: 6000ns
+          o: lstopo
+        - a: 5000
+          c: 1000ns
+          p: 7000ns
+          o: lstopo
+        - a: 5000
+          c: 1000ns
+          p: 8000ns
+          o: lstopo
+        - a: 5000
+          c: 1000ns
+          p: 9000ns
+          o: lstopo
+        - a: 5000
+          c: 1000ns
+          p: 10000ns
+          o: lstopo
+        - a: 5000
+          c: 1000ns
+          p: 11000ns
+          o: lstopo
+        - a: 5000
+          c: 1000ns
+          p: 12000ns
+          o: lstopo
+        - a: 5000
+          c: 1000ns
+          p: 13000ns
+          o: lstopo
+        - a: 5000
+          c: 1000ns
+          p: 14000ns
+          o: lstopo
+        - a: 5000
+          c: 1000ns
+          p: 15000ns
+          o: lstopo
+        - a: 5000
+          c: 1000ns
+          p: 16000ns
+          o: lstopo
+        - a: 5000
+          c: 2000ns
+          p: 20000ns
+          o: lstopo
+        - a: 5000
+          c: 2000ns
+          p: 24000ns
+          o: lstopo
+        - a: 5000
+          c: 3000ns
+          p: 28000ns
+          o: lstopo

benchmarks/lockhammer/scripts/run_sweep_delay.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+# Copyright (c) 2017, The Linux Foundation. All rights reserved.
+# 
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of The Linux Foundation nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+# 
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+# IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+nohup sudo ./test_lockhammer.py lh_sweepdelay_cfg.yaml &