nikon/tuned
1
0
Fork 0
Code Activity Actions

udev: add rules for scheduler tuning

Browse source
This commit is contained in:
Jan Vcelak 2011-01-07 17:00:22 +01:00
parent 4e9b48112d
commit 35b44f0b7f
3 changed files with 57 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

14
udev/80-tuned-iosched.rules Normal file
View file

@ -0,0 +1,14 @@
#
# CFQ's default tunings are geared towards slow SATA disks. If we detect
# anything else, we change the tunings to drive deeper queue depths and
# keep the device busy.
#
SUBSYSTEM!="block", GOTO="end_iosched"
KERNEL=="dm-*", GOTO="end_iosched"
ENV{DEVTYPE}=="partition", GOTO="end_iosched"
ACTION!="add|change", GOTO="end_iosched"
ENV{ID_BUS}=="ata", GOTO="end_iosched"
ATTR{queue/scheduler}!="*\[cfq\]", GOTO="end_iosched"
ATTR{queue/iosched/slice_idle}="0"
ATTR{queue/iosched/quantum}="32"
LABEL="end_iosched"

9
udev/80-tuned-mpath-iosched.rules Normal file
View file

@ -0,0 +1,9 @@
SUBSYSTEM!="block", GOTO="end_mpath_iosched"
ENV{DEVTYPE}=="partition", GOTO="end_mpath_iosched"
KERNEL!="dm-*", GOTO="end_mpath_iosched"
ACTION!="change", GOTO="end_mpath_iosched"
ATTR{queue/scheduler}!="*\[cfq\]", GOTO="end_mpath_iosched"
ENV{DM_UUID}!="mpath-?*", GOTO="end_mpath_iosched"
ENV{DM_ACTION}=="PATH_FAILED", GOTO="end_mpath_iosched"
RUN+="tuned-mpath-iosched.sh"
LABEL="end_mpath_iosched"

34
udev/tuned-mpath-iosched Executable file
View file

@ -0,0 +1,34 @@
#!/bin/sh
#
# For the request-based multipath driver, the I/O scheduler runs on the
# multipath device, not the underlying "slave" devices. This script
# checks the ID_BUS attribute for each of the slave devices. If it finds
# an ata device, it leaves the I/O scheduler tunings alone. For any other
# device, we tune the I/O scheduler to try to keep the device busy.
#
if [ -z "$DEVPATH" ]; then
logger "$0: DEVPATH is not set"
exit 1
fi
if [ ! -d /sys/${DEVPATH}/slaves ]; then
logger "$0: 'slaves' directory under '$DEVPATH' does not exist"
exit 1
fi
needs_tuning=1
for slave in $(command ls /sys/${DEVPATH}/slaves/* 2>/dev/null); do
bus_type=$(/sbin/udevadm info --query=property --path=$slave | grep -m1 ID_BUS | cut -d= -2)
if [ "$bus_type" = "ata" ]; then
needs_tuning=0
break
fi
done
if [ $needs_tuning -eq 1 ]; then
echo 0 > /sys/${DEVPATH}/queue/iosched/slice_idle
echo 32 > /sys/${DEVPATH}/queue/iosched/quantum
fi
exit 0