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