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| author | Paul E. McKenney <paulmck@kernel.org> | 2024-01-12 16:28:19 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2024-01-20 12:40:11 -0800 |
| commit | 94795ce73fbcb48056f077a8f207b932d85c71c6 (patch) | |
| tree | e4439a97e9ba19c7ef4110f13fcf5849f4986a07 | |
| parent | 715741db8e14fda5ded59afc7af1a2c9ea16da74 (diff) | |
| download | perfbook-94795ce73fbcb48056f077a8f207b932d85c71c6.tar.gz | |
CodeSamples/cpu: Add a coe.sh script
The new coe.sh script is similar to fre.sh and rfe.sh, designed to
run tests showing that the coe relation (C++ modification order)
can be counter-temporal.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
| -rwxr-xr-x | CodeSamples/cpu/coe.sh | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/CodeSamples/cpu/coe.sh b/CodeSamples/cpu/coe.sh new file mode 100755 index 00000000..49833709 --- /dev/null +++ b/CodeSamples/cpu/coe.sh @@ -0,0 +1,64 @@ +#!/bin/bash +# +# Produce and reduce temporal coe data. +# +# Usage: bash coe.sh [ nthreads ] +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, you can access it online at +# http://www.gnu.org/licenses/gpl-2.0.html. +# +# Copyright (C) Meta Platforms Inc., 2024 +# +# Authors: Paul E. McKenney <paulmck@kernel.org> + +./temporal --coe --nthreads ${1-15} | +awk ' +BEGIN { + lastentry = ""; + maxtime = ""; + winningcpu = -1; +} + +/^COE-write / { + if (lastentry != "") # @@@ + print "Last entry: " lastentry; # @@@ + st[$2] = $3; + et[$2] = $5; + print "Input line: " $0 # @@@ +} + +$1 ~ /^[0-9][0-9]*$/ { + if (maxtime == "" || maxtime < $2) { + maxtime = $2; + winningcpu = $3; + # lastentry = $0; # @@@ + } +} + +END { + # print "Winning CPU: " winningcpu; # @@@ + mindelta = ""; + for (i in st) { + if (i == winningcpu) + continue; + delta = et[winningcpu] - st[i]; + # print "Delta for CPU " i ": " et[winningcpu] " - " st[i] " = " delta; # @@@ + if (mindelta == "" || mindelta > delta) { + mindelta = delta; + min_et = et[winningcpu]; + min_st = st[i]; + } + } + print winningcpu, min_et, min_st, mindelta, mindelta < 0 ? "!!!" : ""; +}' |