Merge "AIO reaffine tasks and k8s-infra during startup"

This commit is contained in:
Zuul 2019-07-16 19:04:34 +00:00 committed by Gerrit Code Review
commit e186a7ff82
4 changed files with 455 additions and 188 deletions

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@ -41,19 +41,6 @@ function affine_tasks {
local PIDLIST
local RET=0
# Affine non-kernel-thread tasks (excluded [kthreadd] and its children) to all available
# cores. They will be reaffined to platform cores later on as part of nova-compute
# launch.
##log_debug "Affining all tasks to all available CPUs..."
# TODO: Should revisit this since this leaves a few lingering floating
# tasks and does not really work with cgroup cpusets.
# Comment out for now. Cleanup required.
##affine_tasks_to_all_cores
##RET=$?
##if [ $RET -ne 0 ]; then
## log_error "Some tasks failed to be affined to all cores."
##fi
# Get number of logical cpus
N_CPUS=$(cat /proc/cpuinfo 2>/dev/null | \
awk '/^[pP]rocessor/ { n +=1 } END { print (n>0) ? n : 1}')

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@ -1,11 +1,11 @@
[Unit]
Description=StarlingX Affine Tasks
After=syslog.service network.service dbus.service sw-patch.service affine-platform.sh.service
Before=kubelet.service
Before=workerconfig.service
[Service]
Type=oneshot
Type=simple
ExecStart=/etc/init.d/affine-tasks.sh start
[Install]
WantedBy=multi-user.target
WantedBy=multi-user.target

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@ -1,62 +1,441 @@
#!/bin/bash
###############################################################################
#
# Copyright (c) 2019 Wind River Systems, Inc.
#
# SPDX-License-Identifier: Apache-2.0
#
###############################################################################
#
# chkconfig: 2345 80 80
#
### BEGIN INIT INFO
# Provides: affine-tasks
# Required-Start:
# Required-Stop:
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: affine tasks
# Description: This script will affine tasks to the platform cores of the
# host. This ensures that system processes are constrained to platform
# cores and will not run on cores with VMs/containers.
# Short-Description: reaffine tasks on AIO
# Description: This script will dynamically reaffine tasks
# and k8s-infra cgroup cpuset on AIO nodes only. This accomodates
# CPU intensive phases of work. Tasks are initially allowed to float
# across all cores. Once system is at steady-state, this will ensure
# that K8S pods are constrained to platform cores and do not run on
# cores with VMs/containers.
### END INIT INFO
#
# Background:
# There is significant parallel CPU intensive activity:
# - during stx-application apply before critical openstack pods are running,
# e.g., to download docker images, and start all pods.
# - during init and pod recovery after reboot or DOR.
#
# This enables use of all cpus during CPU intensive phase, otherwise the
# startup processing time is considerably longer and we easily hit timeout.
#
# This script waits forever for sufficient platform readiness criteria
# (e.g., system critical pods are recovered, nova-compute is running,
# cinder-volume is running, openstack pods are running), and we have waited
# a short stabilization period before reaffining to the platform cpus.
#
# NOTE: child cgroup cpuset and nodeset must be a subset of the parent
# cgroup's attributes. This requires traversing the tree hierachy in
# specific order when dynamically modifying these attributes.
#
################################################################################
# Define minimal path
PATH=/bin:/usr/bin:/usr/local/bin
CPUMAP_FUNCTIONS=${CPUMAP_FUNCTIONS:-"/etc/init.d/cpumap_functions.sh"}
[[ -e ${CPUMAP_FUNCTIONS} ]] && source ${CPUMAP_FUNCTIONS}
. /usr/bin/tsconfig
. /etc/init.d/task_affinity_functions.sh
# Bring in platform definitions
. /etc/platform/platform.conf
log ()
{
logger -p local1.info -t affine_tasks $@
echo affine_tasks: "$@"
# Environment for kubectl
export KUBECONFIG=/etc/kubernetes/admin.conf
# Global parameters
CGDIR_K8S=/sys/fs/cgroup/cpuset/k8s-infra
INIT_INTERVAL_SECONDS=10
CHECK_INTERVAL_SECONDS=30
PRINT_INTERVAL_SECONDS=300
STABILIZATION_SECONDS=150
# Define pidfile
LNAME=$(readlink -n -f $0)
NAME=$(basename $LNAME)
PIDFILE=/var/run/${NAME}.pid
# Define number of logical cpus
LOGICAL_CPUS=$(getconf _NPROCESSORS_ONLN)
# Define the memory nodeset and cpuset that span all online cpus and nodes
ONLINE_NODES=$(/bin/cat /sys/devices/system/node/online)
ONLINE_CPUS=$(/bin/cat /sys/devices/system/cpu/online)
ONLINE_MASK=$(cpulist_to_cpumap ${ONLINE_CPUS} ${LOGICAL_CPUS} | \
awk '{print tolower($0)}')
ISOL_CPUS=$(/bin/cat /sys/devices/system/cpu/isolated)
if [ ! -z "${ISOL_CPUS}" ]; then
ISOL_CPUMAP=$(cpulist_to_cpumap ${ISOL_CPUS} ${LOGICAL_CPUS})
NONISOL_CPUMAP=$(invert_cpumap ${ISOL_CPUMAP} ${LOGICAL_CPUS})
NONISOL_CPUS=$(cpumap_to_cpulist ${NONISOL_CPUMAP} ${LOGICAL_CPUS})
NONISOL_MASK=$(cpulist_to_cpumap ${NONISOL_CPUS} ${LOGICAL_CPUS} | \
awk '{print tolower($0)}')
else
ISOL_CPUMAP='0'
NONISOL_CPUS=${ONLINE_CPUS}
NONISOL_MASK=${ONLINE_MASK}
fi
# Define platform memory nodeset and cpuset
PLATFORM_NODES=$(cat /sys/devices/system/node/online)
PLATFORM_CPUS=$(platform_expanded_cpu_list)
# Global variables
NOT_READY_REASON=""
STABLE=0
# Log info message to /var/log/daemon.log
function LOG {
logger -p daemon.info -t "${NAME}($$): " "$@"
}
start ()
{
log "Starting affine_tasks. Reaffining tasks to platform cores..."
if [ ! -f ${INITIAL_CONFIG_COMPLETE_FLAG} ]; then
log "Initial Configuration incomplete. Skipping affining tasks."
exit 0
# Log error message to /var/log/daemon.log
function ERROR {
logger -s -p daemon.error -t "${NAME}($$): " "$@"
}
# Update cgroup k8s-infra cpuset and nodeset to span all non-isolated cpus.
function update_cgroup_cpuset_k8s_infra_all {
# Set all cgroup cpuset and nodeset in tree hierarchy order.
# This will always work, no matter the previous cpuset state.
find ${CGDIR_K8S} -type d | \
while read d; do
/bin/echo ${ONLINE_NODES} > ${d}/cpuset.mems 2>/dev/null
/bin/echo ${NONISOL_CPUS} > ${d}/cpuset.cpus 2>/dev/null
done
LOG "Update ${CGDIR_K8S}," \
"ONLINE_NODES=${ONLINE_NODES}, NONISOL_CPUS=${NONISOL_CPUS}"
}
# Update cgroup k8s-infra to span platform cpuset and nodeset.
function update_cgroup_cpuset_k8s_infra_platform {
# Clear any existing cpuset settings. This ensures that the
# subsequent shrink to platform cpuset will always work.
update_cgroup_cpuset_k8s_infra_all
# Set all cgroup cpuset and nodeset in depth-first order.
# NOTE: this only works if we are shrinking the cpuset.
find ${CGDIR_K8S} -depth -type d | \
while read d; do
/bin/echo ${PLATFORM_NODES} > ${d}/cpuset.mems 2>/dev/null
/bin/echo ${PLATFORM_CPUS} > ${d}/cpuset.cpus 2>/dev/null
done
LOG "Update ${CGDIR_K8S}," \
"PLATFORM_NODES=${PLATFORM_NODES}, PLATFORM_CPUS=${PLATFORM_CPUS}"
}
# Check criteria for K8s platform ready on this node.
# i.e., k8s-infra is configured, kubelet is running
function is_k8s_platform_ready {
local PASS=0
local FAIL=1
# Global variable
NOT_READY_REASON=""
# Check that cgroup cpuset k8s-infra has been configured
if [ ! -e ${CGDIR_K8S} ]; then
NOT_READY_REASON="k8s-infra not configured"
return ${FAIL}
fi
# TODO: Should revisit this since this leaves a few lingering floating
# tasks and does not really work with cgroup cpusets.
# Comment out for now. Cleanup required.
##affine_tasks_to_platform_cores
##[[ $? -eq 0 ]] && log "Tasks re-affining done." || log "Tasks re-affining failed."
# Check that kubelet is running and stable
if systemctl is-active kubelet --quiet; then
PID=$(systemctl show kubelet.service -p MainPID | \
awk -vFS='=' '{print $2}')
if [ ${PID} -eq 0 ]; then
NOT_READY_REASON="kubelet not running"
return ${FAIL}
fi
up=$(ps -p ${PID} -o etimes= 2>/dev/null | awk '{print $1}')
if ! { [ -n "${up}" -a ${up} -ge 30 ]; }
then
NOT_READY_REASON="kubelet not yet stable"
return ${FAIL}
fi
else
NOT_READY_REASON="kubelet not running"
return ${FAIL}
fi
LOG "kubelet is ready"
return ${PASS}
}
stop ()
{
log "Stopping affine_tasks..."
# Determine whether this node has 'static' cpu manager policy.
# NOTE: This check assumes that kubelet is already running locally.
function is_static_cpu_manager_policy {
local PASS=0
local FAIL=1
state=$(cat /var/lib/kubelet/cpu_manager_state 2>/dev/null)
if [[ $state =~ \"policyName\":.?\"static\" ]]; then
return ${PASS}
else
return ${FAIL}
fi
}
status()
{
# Check criteria for K8s platform steady-state ready on this node.
# i.e., kube-system pods have recovered, kube application apply
# has completed, nova-compute is running, cinder-volume is running.
# NOTE: This function depends on kubectl commands, so is only
# usable on controllers.
function is_k8s_platform_steady_state_ready {
local PASS=0
local FAIL=1
local this_node=${HOSTNAME}
# Global variable
NOT_READY_REASON=""
# Check that kube-system pods have recovered on this node
npods=$(kubectl get pods --namespace kube-system --no-headers \
--field-selector spec.nodeName=${this_node} 2>/dev/null | \
awk '
BEGIN { n=0; }
!/Completed|Running/ { n+=1 }
END { printf "%d\n", n; }
')
if [ ${npods} -gt 0 ]; then
NOT_READY_REASON="${npods} kube-system pods not recovered"
STABLE=0
return ${FAIL}
fi
# Wait for a few critical openstack pods to be running if this is
# an openstack-compute-node. This is not an exhaustive list.
# Make sure that all openstack pods on this node are running.
labels=$(kubectl get node ${this_node} \
--no-headers --show-labels 2>/dev/null | awk '{print $NF}')
if [[ $labels =~ openstack-compute-node=enabled ]]; then
# nova-compute is one of the last charts to recover after reboot
PODS=( $(kubectl get pods --namespace openstack --no-headers \
--selector application=nova,component=compute \
--field-selector \
spec.nodeName=${this_node},status.phase=Running 2>/dev/null) )
if [ ${#PODS[@]} -eq 0 ]; then
NOT_READY_REASON="nova-compute pod not running"
STABLE=0
return ${FAIL}
fi
# cinder-volume is one of the last charts to recover after reboot
PODS=( $(kubectl get pods --namespace openstack --no-headers \
--selector application=cinder,component=volume \
--field-selector \
spec.nodeName=${this_node},status.phase=Running 2>/dev/null) )
if [ ${#PODS[@]} -eq 0 ]; then
NOT_READY_REASON="cinder-volume pod not running"
STABLE=0
return ${FAIL}
fi
# Check that all openstack pods on this node have recovered
npods=$(kubectl get pods --namespace openstack --no-headers \
--field-selector spec.nodeName=${this_node} 2>/dev/null | \
awk '
BEGIN { n=0; }
!/Completed|Running/ { n+=1 }
END { printf "%d\n", n; }
')
if [ ${npods} -gt 0 ]; then
NOT_READY_REASON="${npods} openstack pods not recovered"
STABLE=0
return ${FAIL}
fi
fi
# Evaluate elapsed time since check criteria pass
if [ ${STABLE} -eq 0 ]; then
STABLE=${SECONDS}
fi
dt=$(( ${SECONDS} - ${STABLE} ))
if [ ${dt} -lt ${STABILIZATION_SECONDS} ]; then
NOT_READY_REASON="stabilization wait"
return ${FAIL}
fi
LOG "K8S is ready"
return ${PASS}
}
# Return list of reaffineable pids. This includes all processes, but excludes
# kernel threads, vSwitch, and anything in K8S or qemu/kvm.
function reaffineable_pids {
local pids_excl
local pidlist
pids_excl=$(ps -eL -o pid=,comm= | \
awk -vORS=',' '/eal-intr-thread|kthreadd/ {print $1}' | \
sed 's/,$/\n/')
pidlist=$(ps --ppid ${pids_excl} -p ${pids_excl} --deselect \
-o pid=,cgroup= | \
awk '!/k8s-infra|machine.slice/ {print $1; }')
echo "${pidlist[@]}"
}
function affine_tasks_to_all_cores {
local pidlist
local count=0
LOG "Affine all tasks, CPUS: ${NONISOL_CPUS};" \
"online=${ONLINE_CPUS} (0x${ONLINE_MASK})," \
"isol=${ISOL_CPUS}, nonisol=${NONISOL_CPUS} (0x${NONISOL_MASK})"
pidlist=( $(reaffineable_pids) )
for pid in ${pidlist[@]}; do
count=$((${count} + 1))
taskset --all-tasks --pid --cpu-list \
${NONISOL_CPUS} ${pid} > /dev/null 2>&1
done
LOG "Affined ${count} processes to all cores."
}
function affine_tasks_to_platform_cores {
local pidlist
local count=0
LOG "Affine all tasks, PLATFORM_CPUS=${PLATFORM_CPUS}"
pidlist=( $(reaffineable_pids) )
for pid in ${pidlist[@]}; do
pid_mask=$(taskset -p $pid 2> /dev/null | awk '{print $6}')
if [ "${pid_mask}" == "${NONISOL_MASK}" ]; then
count=$((${count} + 1))
taskset --all-tasks --pid --cpu-list \
${PLATFORM_CPUS} ${pid} > /dev/null 2>&1
fi
done
# Reaffine vSwitch tasks that span multiple cpus to platform cpus
pidlist=$(ps -eL -o pid=,comm= | awk '/eal-intr-thread/ {print $1}')
for pid in ${pidlist[@]}; do
count=$((${count} + 1))
grep Cpus_allowed_list /proc/${pid}/task/*/status 2>/dev/null | \
sed 's#/# #g' | awk '/,|-/ {print $4}' | \
xargs --no-run-if-empty -i{} \
taskset --pid --cpu-list ${PLATFORM_CPUS} {} > /dev/null 2>&1
done
LOG "Affined ${count} processes to platform cores."
}
function start {
# Ensure this only runs on AIO
if ! { [[ "$nodetype" = "controller" ]] && [[ $subfunction = *worker* ]]; }
then
LOG "Not AIO, nothing to do."
return
fi
# Abort if another instantiation is already running
if [ -e ${PIDFILE} ]; then
PID=$(cat ${PIDFILE})
if [ -n "${PID}" -a -e /proc/${PID} ]; then
ERROR "Aborting, ${PID} already running: ${PIDFILE}."
exit 1
else
OUT=$(rm -v -f ${PIDFILE})
LOG "${OUT}"
fi
fi
LOG "Starting."
# Create pidfile to indicate the script is running
echo $$ > ${PIDFILE}
# Affine all tasks to float on all cores
affine_tasks_to_all_cores
# Wait for kubelet to be running
t0=${SECONDS}
until is_k8s_platform_ready; do
dt=$(( ${SECONDS} - ${t0} ))
if [ ${dt} -ge ${PRINT_INTERVAL_SECONDS} ]; then
t0=${SECONDS}
LOG "Recovery wait, elapsed ${SECONDS} seconds." \
"Reason: ${NOT_READY_REASON}"
fi
sleep ${INIT_INTERVAL_SECONDS}
done
# Update K8S cpuset so that pods float on all cpus
# NOTE: dynamic cpuset changes incompatible with static policy
if ! is_static_cpu_manager_policy; then
update_cgroup_cpuset_k8s_infra_all
fi
# Wait until K8s pods have recovered and nova-compute is running
t0=${SECONDS}
until is_k8s_platform_steady_state_ready; do
dt=$(( ${SECONDS} - ${t0} ))
if [ ${dt} -ge ${PRINT_INTERVAL_SECONDS} ]; then
t0=${SECONDS}
LOG "Recovery wait, elapsed ${SECONDS} seconds." \
"Reason: ${NOT_READY_REASON}"
fi
sleep ${CHECK_INTERVAL_SECONDS}
done
# Update K8S cpuset to platform cores
if ! is_static_cpu_manager_policy; then
update_cgroup_cpuset_k8s_infra_platform
fi
# Affine all floating tasks back to platform cores
affine_tasks_to_platform_cores
# Remove pidfile after successful completion
rm -f ${PIDFILE}
LOG "Complete."
}
function stop {
LOG "Stopping."
# Forcibly stop any running instantiation
if [ -e ${PIDFILE} ]; then
PID=$(cat ${PIDFILE})
if [ -n "${PID}" -a -e /proc/${PID} ]; then
LOG "Stopping ${PID}: ${PIDFILE}."
kill -9 ${PID}
timeout 20 tail --pid=${PID} -f /dev/null
fi
OUT=$(rm -v -f ${PIDFILE})
LOG "${OUT}"
fi
}
function status {
:
}
reset()
{
function reset {
:
}
if [ ${UID} -ne 0 ]; then
ERROR "Need sudo/root permission."
exit 1
fi
case "$1" in
start)
start

View File

@ -29,19 +29,22 @@ LOG_DEBUG=1
TAG="TASKAFFINITY:"
TASK_AFFINING_INCOMPLETE="/etc/platform/.task_affining_incomplete"
N_CPUS=$(cat /proc/cpuinfo 2>/dev/null | \
awk '/^[pP]rocessor/ { n +=1 } END { print (n>0) ? n : 1}')
N_CPUS=$(getconf _NPROCESSORS_ONLN)
FULLSET_CPUS="0-"$((N_CPUS-1))
FULLSET_MASK=$(cpulist_to_cpumap ${FULLSET_CPUS} ${N_CPUS})
PLATFORM_CPUS=$(get_platform_cpu_list)
PLATFORM_CPULIST=$(get_platform_cpu_list| \
PLATFORM_CPUS=$(platform_expanded_cpu_list)
PLATFORM_CPULIST=$(platform_expanded_cpu_list| \
perl -pe 's/(\d+)-(\d+)/join(",",$1..$2)/eg'| \
sed 's/,/ /g')
VSWITCH_CPULIST=$(get_vswitch_cpu_list| \
perl -pe 's/(\d+)-(\d+)/join(",",$1..$2)/eg'| \
sed 's/,/ /g')
if [[ $vswitch_type =~ none ]]; then
VSWITCH_CPULIST=""
fi
IDLE_MARK=95.0
KERNEL=`uname -a`
KERNEL=$(uname -a)
################################################################################
# Check if a given core is one of the platform cores
@ -69,98 +72,19 @@ function is_vswitch_core {
return 0
}
################################################################################
# An audit and corrective action following a swact
################################################################################
function audit_and_reaffine {
local mask=$1
local cmd_str=""
local tasklist
cmd_str="ps-sched.sh|awk '(\$9==\"$mask\") {print \$2}'"
tasklist=($(eval $cmd_str))
# log_debug "cmd str = $cmd_str"
log_debug "${TAG} There are ${#tasklist[@]} tasks to reaffine."
for task in ${tasklist[@]}; do
taskset -acp ${PLATFORM_CPUS} $task &> /dev/null
rc=$?
[[ $rc -ne 0 ]] && log_error "Failed to set CPU affinity for pid $pid, rc=$rc"
done
tasklist=($(eval $cmd_str))
[[ ${#tasklist[@]} -eq 0 ]] && return 0 || return 1
}
################################################################################
# The following function is used to verify that any sleeping management tasks
# that are on non-platform cores can be migrated to platform cores as soon as
# they are scheduled. It can be invoked either manually or from goenableCompute
# script as a scheduled job (with a few minute delay) if desired.
# The induced tasks migration should be done after all VMs have been restored
# following a host reboot in AIO, hence the delay.
################################################################################
function move_inactive_threads_to_platform_cores {
local tasklist
local cmd_str=""
# Compile a list of non-kernel & non-vswitch/VM related threads that are not
# on platform cores.
# e.g. if the platform cpulist value is "0 8", the resulting command to be
# evaluated should look like this:
# ps-sched.sh|grep -v vswitch|awk '($10!=0 && $10!=8 && $3!=2) {if(NR>1)print $2}'
cmd_str="ps-sched.sh|grep -v vswitch|awk '("
for cpu_num in ${PLATFORM_CPULIST}; do
cmd_str=$cmd_str"\$10!="${cpu_num}" && "
done
cmd_str=$cmd_str"\$3!=2) {if(NR>1)print \$2}'"
echo "selection string = $cmd_str"
tasklist=($(eval $cmd_str))
log_debug "${TAG} There are ${#tasklist[@]} number of tasks to be moved."
# These sleep tasks are stuck on the wrong core(s). They need to be woken up
# so they can be migrated to the right ones. Attaching and detaching strace
# momentarily to the task does the trick.
for task in ${tasklist[@]}; do
strace -p $task 2>/dev/null &
pid=$!
sleep 0.1
kill -SIGINT $pid
done
tasklist=($(eval $cmd_str))
[[ ${#tasklist[@]} -eq 0 ]] && return 0 || return 1
}
################################################################################
# The following function is called by affine-platform.sh to affine tasks to
# all available cores during initial startup and subsequent host reboots.
################################################################################
function affine_tasks_to_all_cores {
# Return list of reaffineable pids. This includes all processes, but excludes
# kernel threads, vSwitch, and anything in K8S or qemu/kvm.
function reaffineable_pids {
local pids_excl
local pidlist
local rc=0
if [[ "${KERNEL}" == *" RT "* ]]; then
return 0
fi
log_debug "${TAG} Affining all tasks to CPU (${FULLSET_CPUS})"
pidlist=$(ps --ppid 2 -p 2 --deselect -o pid= | awk '{ print $1; }')
for pid in ${pidlist[@]}; do
ppid=$(ps -o ppid= -p $pid |tr -d '[:space:]')
if [ -z $ppid ] || [ $ppid -eq 2 ]; then
continue
fi
log_debug "Affining pid $pid, parent pid = $ppid"
taskset --all-tasks --pid --cpu-list ${FULLSET_CPUS} $pid &> /dev/null
rc=$?
[[ $rc -ne 0 ]] && log_error "Failed to set CPU affinity for pid $pid, rc=$rc"
done
# Write the cpu list to a temp file which will be read and removed when
# the tasks are reaffined back to platform cores later on.
echo ${FULLSET_CPUS} > ${TASK_AFFINING_INCOMPLETE}
return $rc
pids_excl=$(ps -eL -o pid=,comm= | \
awk -vORS=',' '/eal-intr-thread|kthreadd/ {print $1}' | \
sed 's/,$/\n/')
pidlist=$(ps --ppid ${pids_excl} -p ${pids_excl} --deselect \
-o pid=,cgroup= | \
awk '!/k8s-infra|machine.slice/ {print $1; }')
echo "${pidlist[@]}"
}
################################################################################
@ -208,35 +132,25 @@ function affine_tasks_to_idle_cores {
is_platform_core $cpu
if [ $? -eq 1 ]; then
# Platform core is added to the idle list by default
# Platform core is added to the idle list by default
idle_cpulist=$idle_cpulist$cpu","
else
# Non platform core is added to the idle list if it is more than 95% idle
[[ $(echo "$idle_value > ${IDLE_MARK}"|bc) -eq 1 ]] && idle_cpulist=$idle_cpulist$cpu","
# Non platform core is added to the idle list if it is more
# than 95% idle
if [[ $(echo "$idle_value > ${IDLE_MARK}"|bc) -eq 1 ]]; then
idle_cpulist=$idle_cpulist$cpu","
fi
fi
cpu=$(($cpu+1))
done
idle_cpulist=$(echo $idle_cpulist|sed 's/.$//')
platform_affinity_mask=$(cpulist_to_cpumap ${PLATFORM_CPUS} ${N_CPUS} \
|awk '{print tolower($0)}')
log_debug "${TAG} Affining all tasks to idle CPU ($idle_cpulist)"
vswitch_pid=$(pgrep vswitch)
pidlist=$(ps --ppid 2 -p 2 --deselect -o pid= | awk '{ print $1; }')
pidlist=( $(reaffineable_pids) )
for pid in ${pidlist[@]}; do
ppid=$(ps -o ppid= -p $pid |tr -d '[:space:]')
if [ -z $ppid ] || [ $ppid -eq 2 ] || [ "$pid" = "$vswitch_pid" ]; then
continue
fi
pid_affinity_mask=$(taskset -p $pid | awk '{print $6}')
if [ "${pid_affinity_mask}" == "${platform_affinity_mask}" ]; then
# log_debug "Affining pid $pid to idle cores..."
taskset --all-tasks --pid --cpu-list $idle_cpulist $pid &> /dev/null
rc=$?
[[ $rc -ne 0 ]] && log_error "Failed to set CPU affinity for pid $pid, rc=$rc"
fi
taskset --all-tasks --pid --cpu-list \
${idle_cpulist} ${pid} > /dev/null 2>&1
done
# Save the cpu list to the temp file which will be read and removed when
@ -246,10 +160,7 @@ function affine_tasks_to_idle_cores {
}
################################################################################
# The following function is called by either:
# a) nova-compute wrapper script during AIO system initial bringup or reboot
# or
# b) sm at the end of swact sequence
# The following function is called by sm at the end of swact sequence
# to re-affine management tasks back to the platform cores.
################################################################################
function affine_tasks_to_platform_cores {
@ -259,42 +170,32 @@ function affine_tasks_to_platform_cores {
local count=0
if [ ! -f ${TASK_AFFINING_INCOMPLETE} ]; then
dbg_str="${TAG} Either tasks have never been affined to all/idle cores or"
dbg_str=$dbg_str" they have already been reaffined to platform cores."
dbg_str="${TAG} Either tasks have never been affined to all/idle"
dbg_str="${TAG} cores or they have already been reaffined to"
dbg_str="${TAG} platform cores."
log_debug "$dbg_str"
return 0
fi
read cpulist < ${TASK_AFFINING_INCOMPLETE}
affinity_mask=$(cpulist_to_cpumap $cpulist ${N_CPUS}|awk '{print tolower($0)}')
log_debug "${TAG} Reaffining tasks to platform cores (${PLATFORM_CPUS})..."
pidlist=$(ps --ppid 2 -p 2 --deselect -o pid= | awk '{ print $1; }')
pidlist=( $(reaffineable_pids) )
for pid in ${pidlist[@]}; do
# log_debug "Processing pid $pid..."
pid_affinity_mask=$(taskset -p $pid | awk '{print $6}')
# Only management tasks need to be reaffined. Kernel, vswitch and VM related
# tasks were not affined previously so they should have different affinity
# mask(s).
if [ "${pid_affinity_mask}" == "${affinity_mask}" ]; then
count=$(($count+1))
# log_debug "Affining pid $pid to platform cores..."
taskset --all-tasks --pid --cpu-list ${PLATFORM_CPUS} $pid &> /dev/null
rc=$?
[[ $rc -ne 0 ]] && log_error "Failed to set CPU affinity for pid $pid, rc=$rc"
fi
taskset --all-tasks --pid --cpu-list \
${PLATFORM_CPUS} ${pid} > /dev/null 2>&1
done
# A workaround for lack of "end of swact" state
fullmask=$(echo ${FULLSET_MASK} | awk '{print tolower($0)}')
if [ "${affinity_mask}" != "${fullmask}" ]; then
log_debug "${TAG} Schedule an audit and cleanup"
(sleep 60; audit_and_reaffine "0x"$affinity_mask) &
fi
# Reaffine vSwitch tasks that span multiple cpus to platform cpus
pidlist=$(ps -eL -o pid=,comm= | awk '/eal-intr-thread/ {print $1}')
for pid in ${pidlist[@]}; do
grep Cpus_allowed_list /proc/${pid}/task/*/status 2>/dev/null | \
sed 's#/# #g' | awk '/,|-/ {print $4}' | \
xargs --no-run-if-empty -i{} \
taskset --pid --cpu-list ${PLATFORM_CPUS} {} > /dev/null 2>&1
done
rm -rf ${TASK_AFFINING_INCOMPLETE}
log_debug "${TAG} $count tasks were reaffined to platform cores."
return $rc
}