1 #!/bin/sh
2 # SPDX-License-Identifier: GPL-2.0+
3 #
4 # Runs the C-language litmus tests matching the specified criteria.
5 # Generates the output for each .litmus file into a corresponding
6 # .litmus.out file, and does not judge the result.
7 #
8 # sh initlitmushist.sh
9 #
10 # Run from the Linux kernel tools/memory-model directory.
11 # See scripts/parseargs.sh for list of arguments.
12 #
13 # This script can consume significant wallclock time and CPU, especially as
14 # the value of --procs rises. On a four-core (eight hardware threads)
15 # 2.5GHz x86 with a one-minute per-run timeout:
16 #
17 # --procs wallclock CPU timeouts tests
18 # 1 0m11.241s 0m1.086s 0 19
19 # 2 1m12.598s 2m8.459s 2 393
20 # 3 1m30.007s 6m2.479s 4 2291
21 # 4 3m26.042s 18m5.139s 9 3217
22 # 5 4m26.661s 23m54.128s 13 3784
23 # 6 4m41.900s 26m4.721s 13 4352
24 # 7 5m51.463s 35m50.868s 13 4626
25 # 8 10m5.235s 68m43.672s 34 5117
26 # 9 15m57.80s 105m58.101s 69 5156
27 # 10 16m14.13s 103m35.009s 69 5165
28 # 20 27m48.55s 198m3.286s 156 5269
29 #
30 # Increasing the timeout on the 20-process run to five minutes increases
31 # the runtime to about 90 minutes with the CPU time rising to about
32 # 10 hours. On the other hand, it decreases the number of timeouts to 101.
33 #
34 # Note that there are historical tests for which herd7 will fail
35 # completely, for example, litmus/manual/atomic/C-unlock-wait-00.litmus
36 # contains a call to spin_unlock_wait(), which no longer exists in either
37 # the kernel or LKMM.
38
39 . scripts/parseargs.sh
40
41 T=/tmp/initlitmushist.sh.$$
42 trap 'rm -rf $T' 0
43 mkdir $T
44
45 if test -d litmus
46 then
47 :
48 else
49 git clone https://github.com/paulmckrcu/litmus
50 ( cd litmus; git checkout origin/master )
51 fi
52
53 # Create any new directories that have appeared in the github litmus
54 # repo since the last run.
55 if test "$LKMM_DESTDIR" != "."
56 then
57 find litmus -type d -print |
58 ( cd "$LKMM_DESTDIR"; sed -e 's/^/mkdir -p /' | sh )
59 fi
60
61 # Create a list of the C-language litmus tests with no more than the
62 # specified number of processes (per the --procs argument).
63 find litmus -name '*.litmus' -print | mselect7 -arch C > $T/list-C
64 xargs < $T/list-C -r grep -L "^P${LKMM_PROCS}" > $T/list-C-short
65
66 scripts/runlitmushist.sh < $T/list-C-short
67
68 exit 0
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