55 lines
2.3 KiB
Bash
55 lines
2.3 KiB
Bash
#!/bin/bash
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#
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# Copyright(c) 2013-2016, Wind River Systems, Inc.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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# * Neither the name of Wind River Systems nor the names of its
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# contributors may be used to endorse or promote products derived
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# from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# Query the metadata server for the set of cpus that are supposed to be offline
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# It will be in the form "set([])" for the empty set, and "set([1, 2, 3])" for the
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# non-empty set.
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CPUSET_OFFLINE=`wget -t 3 -T 5 -qO - http://169.254.169.254/latest/meta-data/offline_cpuset`
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RC=$?
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if [ $RC -ne 0 ]
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then
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logger -p daemon.err "${0}: unable to obtain "offline_cpuset" value. rc: ${RC}"
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exit -1
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fi
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OFFLINE_CPUS=`echo ${CPUSET_OFFLINE}|grep -oE [0-9]+`
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for CPU in $OFFLINE_CPUS
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do
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# Offline this cpu to match the underlying virtual machine.
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echo 0 > /sys/devices/system/cpu/cpu${CPU}/online
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RC=$?
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if [ $RC -ne 0 ]
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then
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logger -p daemon.err "${0}: unable to offline cpu ${CPU}. rc: ${RC}"
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exit -1
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fi
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done
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