SchedConfig

From Kerrighed

Sample script to configure a scheduler having the same behavior as the legacy scheduler:

#!/bin/sh

# Round robin balancing with remote clone
SCHEDULER_PATH=/config/krg_scheduler/schedulers/rr

mkdir -p "$SCHEDULER_PATH/round_robin_balancer" && \
echo 1 > "$SCHEDULER_PATH/process_set/handle_all"


# Dynamic Mosix-like CPU load balancing with migration
SCHEDULER_NAME=mosix
# 2 seconds between each migration
MIGRATION_INTERVAL=2000000000
# Refresh remote node loads every second
POLL_INTERVAL=1000

SCHEDULER_PATH="schedulers/$SCHEDULER_NAME"
POLICY_PATH="${SCHEDULER_PATH}/mosix_load_balancer"
MOSIX_PROBE_PATH=probes/mosix_probe
MIGRATION_PROBE_PATH=probes/migration_probe

cd /config/krg_scheduler && \
mkdir "$MOSIX_PROBE_PATH" && \
mkdir "$MIGRATION_PROBE_PATH" && \
mkdir -p "$POLICY_PATH" && \
mkdir "${POLICY_PATH}/local_load/freq_limit_filter" && \
echo $MIGRATION_INTERVAL > "${POLICY_PATH}/local_load/freq_limit_filter/min_interval" && \
mkdir "${POLICY_PATH}/local_load/freq_limit_filter/threshold_filter" && \
v=`< "${MOSIX_PROBE_PATH}/norm_single_process_load/value"` && \
echo `echo "$v + $v / 2" | bc` > "${POLICY_PATH}/local_load/freq_limit_filter/threshold_filter/threshold" && \
mkdir "${POLICY_PATH}/remote_load/remote_cache_filter" && \
echo $POLL_INTERVAL > "${POLICY_PATH}/remote_load/remote_cache_filter/polling_period" && \
mkdir "${POLICY_PATH}/single_process_load/remote_cache_filter" && \
ln -s "${MIGRATION_PROBE_PATH}/last_migration" "${POLICY_PATH}/local_load/freq_limit_filter/last_event/migration" && \
ln -s "${MOSIX_PROBE_PATH}/process_load" "${POLICY_PATH}/process_load/mosix" && \
ln -s "${MOSIX_PROBE_PATH}/norm_upper_load" "${POLICY_PATH}/remote_load/remote_cache_filter/mosix_upper" && \
ln -s "${MOSIX_PROBE_PATH}/norm_single_process_load" "${POLICY_PATH}/single_process_load/remote_cache_filter/mosix" && \
ln -s "${MOSIX_PROBE_PATH}/norm_mean_load" "${POLICY_PATH}/local_load/freq_limit_filter/threshold_filter/mosix_mean" && \
echo 1 > "${SCHEDULER_PATH}/process_set/handle_all"

Documentation:

• slides from Kerrighed summit '08

• patch headers (see below),
• source code headers (see below),
• source code (see below).

Source code:

• devel-sched development branch: svn://scm.gforge.inria.fr/svn/kerrighed/branches/devel-sched.
• Latest quilt patchset for Kerrighed trunk: 2008-05-26.