memory-model/scripts/initlitmushist.sh

0001 #!/bin/sh
0002 # SPDX-License-Identifier: GPL-2.0+
0003 #
0004 # Runs the C-language litmus tests matching the specified criteria.
0005 # Generates the output for each .litmus file into a corresponding
0006 # .litmus.out file, and does not judge the result.
0007 #
0008 # sh initlitmushist.sh
0009 #
0010 # Run from the Linux kernel tools/memory-model directory.
0011 # See scripts/parseargs.sh for list of arguments.
0012 #
0013 # This script can consume significant wallclock time and CPU, especially as
0014 # the value of --procs rises.  On a four-core (eight hardware threads)
0015 # 2.5GHz x86 with a one-minute per-run timeout:
0016 #
0017 # --procs wallclock CPU         timeouts        tests
0018 #       1 0m11.241s 0m1.086s           0           19
0019 #       2 1m12.598s 2m8.459s           2          393
0020 #       3 1m30.007s 6m2.479s           4         2291
0021 #       4 3m26.042s 18m5.139s          9         3217
0022 #       5 4m26.661s 23m54.128s        13         3784
0023 #       6 4m41.900s 26m4.721s         13         4352
0024 #       7 5m51.463s 35m50.868s        13         4626
0025 #       8 10m5.235s 68m43.672s        34         5117
0026 #       9 15m57.80s 105m58.101s       69         5156
0027 #      10 16m14.13s 103m35.009s       69         5165
0028 #      20 27m48.55s 198m3.286s       156         5269
0029 #
0030 # Increasing the timeout on the 20-process run to five minutes increases
0031 # the runtime to about 90 minutes with the CPU time rising to about
0032 # 10 hours.  On the other hand, it decreases the number of timeouts to 101.
0033 #
0034 # Note that there are historical tests for which herd7 will fail
0035 # completely, for example, litmus/manual/atomic/C-unlock-wait-00.litmus
0036 # contains a call to spin_unlock_wait(), which no longer exists in either
0037 # the kernel or LKMM.
0038
0039 . scripts/parseargs.sh
0040
0041 T=/tmp/initlitmushist.sh.$$
0042 trap 'rm -rf $T' 0
0043 mkdir $T
0044
0045 if test -d litmus
0046 then
0047         :
0048 else
0049         git clone https://github.com/paulmckrcu/litmus
0050         ( cd litmus; git checkout origin/master )
0051 fi
0052
0053 # Create any new directories that have appeared in the github litmus
0054 # repo since the last run.
0055 if test "$LKMM_DESTDIR" != "."
0056 then
0057         find litmus -type d -print |
0058         ( cd "$LKMM_DESTDIR"; sed -e 's/^/mkdir -p /' | sh )
0059 fi
0060
0061 # Create a list of the C-language litmus tests with no more than the
0062 # specified number of processes (per the --procs argument).
0063 find litmus -name '*.litmus' -exec grep -l -m 1 "^C " {} \; > $T/list-C
0064 xargs < $T/list-C -r grep -L "^P${LKMM_PROCS}" > $T/list-C-short
0065
0066 scripts/runlitmushist.sh < $T/list-C-short
0067
0068 exit 0