testcases/pounder21/test_scripts/ramsnake

   1 #!/bin/bash
   2
   3 # Control script for a program that tests shared memory access speeds.
   4
   5 # Copyright (C) 2003-2006 IBM
   6 #
   7 # This program is free software; you can redistribute it and/or
   8 # modify it under the terms of the GNU General Public License as
   9 # published by the Free Software Foundation; either version 2 of the
  10 # License, or (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful, but
  13 # WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 # General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program; if not, write to the Free Software
  19 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  20 # 02111-1307, USA.
  21
  22 # Kill anything in this process group
  23 trap 'kill -9 `pgrep -P $$` 2> /dev/null; exit 0' 1 2 15
  24
  25 # Try to find ramsnake
  26 PROGRAM="$POUNDER_SRCDIR/ramsnake/snake.exe"
  27 if [ -z "$PROGRAM" ]; then
  28         echo "Cannot find ramsnake; did you run Install?"
  29         exit -1
  30 fi
  31
  32 # We want enough nodes to consume 1/2 of whatever RAM isn't being used
  33 # for programs or buffers.  Note that we must divide again by the number
  34 # of CPUs in the system so that the _total_ memory used is 1/4.
  35 #
  36 # Does the LONG_BIT config variable really refer to the size
  37 # of a pointer?
  38 MEM_AVAIL=$(( `grep ^MemFree: /proc/meminfo | awk -F " " '{print $2}'` + `grep ^Cached: /proc/meminfo | awk -F " " '{print $2}'`))
  39 NUM_NODES=$(( (MEM_AVAIL * 1024 / (2 * NR_CPUS)) / $((`getconf LONG_BIT` / 8)) ))
  40
  41 # Start up a bunch of ramsnakes in the background.
  42 for ((k=0; k < $NR_CPUS; k++))
  43 do
  44         "$POUNDER_HOME/timed_loop" 300 "$PROGRAM" -p $NR_CPUS -n $NUM_NODES &
  45 done
  46
  47 LOGFILE=/proc/$$/fd/1
  48 OLD_ERRORS=0
  49
  50 # Check for errors while snake runs.
  51 while [ `pgrep -P $$ | wc -l` -gt 1 ];
  52 do
  53         NEW_ERRORS=`egrep -ic "(segmentation|fault|error|illegal)" $LOGFILE`
  54         ERRORS=$(( NEW_ERRORS - OLD_ERRORS ))
  55         if [ $ERRORS -eq 255 ]; then
  56                 ERRORS=254
  57         fi
  58
  59         if [ $ERRORS -gt 0 ]; then
  60                 echo "Program crash detected.  Aborting."
  61                 exit 1
  62         fi
  63         OLD_ERRORS=$ERRORS
  64         sleep 5
  65 done
  66
  67 # Failures will probably hang the system or segfault snake.
  68 exit 0