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Diffstat (limited to 'scripts/vyatta-irqaffin')
| -rwxr-xr-x | scripts/vyatta-irqaffin | 215 |
1 files changed, 0 insertions, 215 deletions
diff --git a/scripts/vyatta-irqaffin b/scripts/vyatta-irqaffin deleted file mode 100755 index 9330d4d..0000000 --- a/scripts/vyatta-irqaffin +++ /dev/null @@ -1,215 +0,0 @@ -#!/bin/bash - -# Author: Robert E. Gilligan <gilligan@vyatta.com> -# Date: 2008 -# Description: CLI back-end script to manipulate NIC interrupt CPU affinity. - -# **** License **** -# This program is free software; you can redistribute it and/or modify -# it under the terms of the GNU General Public License version 2 as -# published by the Free Software Foundation. -# -# 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. -# -# This code was originally developed by Vyatta, Inc. -# Portions created by Vyatta are Copyright (C) 2006, 2007, 2008 Vyatta, Inc. -# All Rights Reserved. -# **** End License **** - -# Provides sub-commands to: -# - Check the validity of an affinity mask value -# - Set the affinity mask to the IRQs being used by an interface -# - Reset the affinity mask of the IRQs being used by an interface to the -# system default value of all-ones. -# - Print the affinity mask of the IRQs being used by an interface -# -# If the NIC in question supports multiple IRQs, the "set" sub-command -# sets all IRQs to the same mask. The "print" sub-command displays -# the mask of each IRQ individually. -# - -# Max number of hex characters in an IRQ affinity mask. Support up to 64 CPUs. -MAX_MASK=16 - -# Set up some global values... -numcpus=`grep -c -e "^processor" /proc/cpuinfo` -declare -i maxmask=(2**numcpus) -let maxmask=maxmask-1 -maxmaskhex=`printf "%x" ${maxmask}` - -print_usage() -{ - echo "Usage:" - echo -e "\t$0 check <ifname> <mask>" - echo -e "\t$0 set <ifname> <mask>" - echo -e "\t$0 reset <ifname>" - echo -e "\t$0 print <ifname>" -} - -get_irqnums() -{ - irqnums=`grep $1 /proc/interrupts | awk -F ': ' '{ print $1 }'` - if [ -z "$irqnums" ]; then - echo "Unable to determine IRQs for interface $1" - return 1 - fi - return 0 -} - - -get_mask() -{ - mask=$1 - # mask must be a short hex value - if [ ${#mask} -gt $MAX_MASK ]; then - echo "mask too long: ${#2} characters." - return 1 - fi - - # strip out all the hex digits - exmask=`echo $mask | sed -e s/[0-9a-fA-F]//g` - - # if anything is left, its not hex - if [ ! -z "$exmask" ]; then - echo "Invalid characters in hex mask: $exmask" - return 1 - fi - - declare -i intmask=0x${mask} - - # Make sure that mask holds at least one bit, and holds no more bits - # than we have CPUs. - - if [ ${intmask} -eq 0 ]; then - echo "Mask can not be 0." - return 1 - fi - - if [ $intmask -gt $maxmask ]; then - echo "Mask is too large. Maximum hexidecimal bitmask is: ${maxmaskhex}" - return 1 - fi - - return 0 -} - - -# -# Don't waste our time with uniprocessor machines -# -check_uniproc() -{ - if [ $maxmask -eq 1 ]; then - echo "This machine has only 1 CPU." - echo "Can only set SMP affinity on multi-processor machines" - return 1; - fi - return 0 -} - - -case "$1" in - check) - # Note: We don't validate the interface name even though - # it is available as a command argument. That is because - # the interface may not exist or may not be configured at - # the time the check is performed. - # - if [ $# -ne 3 ]; then - print_usage - exit 1 - fi - - if ! check_uniproc ; then - exit 1 - fi - - if ! get_mask $3 ; then - exit 1 - fi - exit 0 - ;; - - set) - if [ $# -ne 3 ]; then - print_usage - exit 1 - fi - - if ! check_uniproc ; then - exit 1 - fi - - if ! get_irqnums $2 ; then - exit 1 - fi - - if ! get_mask $3 ; then - exit 1 - fi - - for irqnum in $irqnums ; do - echo $mask > /proc/irq/$irqnum/smp_affinity - done - - if [ $? -ne 0 ]; then - echo "Couldn't assign smp_affinity. Exit status: $?" - exit 1 - fi - ;; - - reset) - if [ $# -ne 2 ]; then - print_usage - exit 1 - fi - if ! get_irqnums $2 ; then - exit 1 - fi - - if [ -e /proc/irq/default_smp_affinity ]; then - defmask=`cat /proc/irq/default_smp_affinity` - else - defmask=$maxmaskhex - fi - - for irqnum in $irqnums ; do - echo $defmask > /proc/irq/$irqnum/smp_affinity - if [ $? -ne 0 ]; then - echo "Couldn't assign smp_affinity for IRQ $irqnum. Exit status: $?" - exit 1 - fi - done - ;; - - - print) - if [ $# -ne 2 ]; then - print_usage - exit 1 - fi - if ! get_irqnums $2 ; then - exit 1 - fi - - for irqnum in $irqnums ; do - mask=`cat /proc/irq/$irqnum/smp_affinity` - - if [ -z $mask ]; then - echo "Couldn't get smp_affinity for interface $2, irq $irqnum" - exit 1 - fi - - echo "Interface: $2 IRQ: $irqnum Mask: $mask" - done - ;; - - *) - print_usage - exit 1 - ;; - -esac |