tools/memory-model/scripts/initlitmushist.sh

   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' -exec grep -l -m 1 "^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