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The https://github.com/paulmckrcu/litmus repository contains a large number of C-language litmus tests that include "Result:" comments predicting the verification result. This commit adds a number of scripts that run tests on these litmus tests: checkghlitmus.sh: Runs all litmus tests in the https://github.com/paulmckrcu/litmus archive that are C-language and that have "Result:" comment lines documenting expected results, comparing the actual results to those expected. Clones the repository if it has not already been cloned into the "tools/memory-model/litmus" directory. initlitmushist.sh Run all litmus tests having no more than the specified number of processes given a specified timeout, recording the results in .litmus.out files. Clones the repository if it has not already been cloned into the "tools/memory-model/litmus" directory. newlitmushist.sh For all new or updated litmus tests having no more than the specified number of processes given a specified timeout, run and record the results in .litmus.out files. checklitmushist.sh Run all litmus tests having .litmus.out files from previous initlitmushist.sh or newlitmushist.sh runs, comparing the herd output to that of the original runs. The above scripts will run litmus tests concurrently, by default with one job per available CPU. Giving any of these scripts the --help argument will cause them to print usage information. This commit also adds a number of helper scripts that are not intended to be invoked from the command line: cmplitmushist.sh: Compare the output of two different runs of the same litmus test. judgelitmus.sh: Compare the output of a litmus test to its "Result:" comment line. parseargs.sh: Parse command-line arguments. runlitmushist.sh: Run the litmus tests whose pathnames are provided one per line on standard input. While in the area, this commit also makes the existing checklitmus.sh and checkalllitmus.sh scripts use parseargs.sh in order to provide a bit of uniformity. In addition, per-litmus-test status output is directed to stdout, while end-of-test summary information is directed to stderr. Finally, the error flag standardizes on "!!!" to assist those familiar with rcutorture output. The defaults for the parseargs.sh arguments may be overridden by using environment variables: LKMM_DESTDIR for --destdir, LKMM_HERD_OPTIONS for --herdoptions, LKMM_JOBS for --jobs, LKMM_PROCS for --procs, and LKMM_TIMEOUT for --timeout. [ paulmck: History-check summary-line changes per Alan Stern feedback. ] Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: akiyks@gmail.com Cc: boqun.feng@gmail.com Cc: dhowells@redhat.com Cc: j.alglave@ucl.ac.uk Cc: linux-arch@vger.kernel.org Cc: luc.maranget@inria.fr Cc: npiggin@gmail.com Cc: parri.andrea@gmail.com Cc: stern@rowland.harvard.edu Cc: will.deacon@arm.com Link: http://lkml.kernel.org/r/20181203230451.28921-2-paulmck@linux.ibm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
69 lines
2.2 KiB
Bash
69 lines
2.2 KiB
Bash
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0+
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#
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# Runs the C-language litmus tests matching the specified criteria.
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# Generates the output for each .litmus file into a corresponding
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# .litmus.out file, and does not judge the result.
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#
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# sh initlitmushist.sh
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#
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# Run from the Linux kernel tools/memory-model directory.
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# See scripts/parseargs.sh for list of arguments.
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#
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# This script can consume significant wallclock time and CPU, especially as
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# the value of --procs rises. On a four-core (eight hardware threads)
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# 2.5GHz x86 with a one-minute per-run timeout:
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#
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# --procs wallclock CPU timeouts tests
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# 1 0m11.241s 0m1.086s 0 19
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# 2 1m12.598s 2m8.459s 2 393
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# 3 1m30.007s 6m2.479s 4 2291
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# 4 3m26.042s 18m5.139s 9 3217
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# 5 4m26.661s 23m54.128s 13 3784
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# 6 4m41.900s 26m4.721s 13 4352
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# 7 5m51.463s 35m50.868s 13 4626
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# 8 10m5.235s 68m43.672s 34 5117
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# 9 15m57.80s 105m58.101s 69 5156
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# 10 16m14.13s 103m35.009s 69 5165
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# 20 27m48.55s 198m3.286s 156 5269
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#
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# Increasing the timeout on the 20-process run to five minutes increases
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# the runtime to about 90 minutes with the CPU time rising to about
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# 10 hours. On the other hand, it decreases the number of timeouts to 101.
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#
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# Note that there are historical tests for which herd7 will fail
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# completely, for example, litmus/manual/atomic/C-unlock-wait-00.litmus
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# contains a call to spin_unlock_wait(), which no longer exists in either
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# the kernel or LKMM.
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. scripts/parseargs.sh
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T=/tmp/initlitmushist.sh.$$
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trap 'rm -rf $T' 0
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mkdir $T
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if test -d litmus
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then
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:
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else
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git clone https://github.com/paulmckrcu/litmus
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( cd litmus; git checkout origin/master )
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fi
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# Create any new directories that have appeared in the github litmus
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# repo since the last run.
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if test "$LKMM_DESTDIR" != "."
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then
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find litmus -type d -print |
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( cd "$LKMM_DESTDIR"; sed -e 's/^/mkdir -p /' | sh )
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fi
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# Create a list of the C-language litmus tests with no more than the
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# specified number of processes (per the --procs argument).
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find litmus -name '*.litmus' -exec grep -l -m 1 "^C " {} \; > $T/list-C
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xargs < $T/list-C -r grep -L "^P${LKMM_PROCS}" > $T/list-C-short
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scripts/runlitmushist.sh < $T/list-C-short
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exit 0
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