diff options
| -rw-r--r-- | debian/changelog | 9 | ||||
| -rw-r--r-- | debian/control | 1 | ||||
| -rw-r--r-- | debian/ubuntu-vexpress-extras-config.upstart | 46 |
3 files changed, 36 insertions, 20 deletions
diff --git a/debian/changelog b/debian/changelog index feef09e..8b3735c 100644 --- a/debian/changelog +++ b/debian/changelog @@ -1,3 +1,12 @@ +ubuntu-vexpress-extras-config (0.4) quantal; urgency=low + + * Update upstart script to be smart about detecting CPU core types + when setting the cpufreq governor. + * Drop Vcs-Bzr entry from control file as I can't be bothered with the + hassle of using bazaar. + + -- Jon Medhurst (Tixy) <jon.medhurst@linaro.org> Fri, 22 Feb 2013 14:19:00 +0000 + ubuntu-vexpress-extras-config (0.3) quantal; urgency=low * Update postinst/postrm scripts to disable cpufrequtils so it diff --git a/debian/control b/debian/control index 6aeef8d..677eddb 100644 --- a/debian/control +++ b/debian/control @@ -4,7 +4,6 @@ Priority: extra Maintainer: Linaro Developers <linaro-dev@lists.linaro.org> Build-Depends: debhelper (>= 9) Standards-Version: 3.9.3 -Vcs-Bzr: https://code.launchpad.net/~linaro-maintainers/linaro-ubuntu/ubuntu-vexpress-extras-config Package: ubuntu-vexpress-extras-config Architecture: all diff --git a/debian/ubuntu-vexpress-extras-config.upstart b/debian/ubuntu-vexpress-extras-config.upstart index f0aa4c0..6920736 100644 --- a/debian/ubuntu-vexpress-extras-config.upstart +++ b/debian/ubuntu-vexpress-extras-config.upstart @@ -5,23 +5,31 @@ task script # Setup cpufeq # - # We want to setup big cores to 'performance' and LITTLE cores - # to 'ondemand' but currently there isn't any way to determine - # which is which. So what we'll do for now is: - # a) assume that N big cores are numbered 0..N-1 and LITTLE - # cores are N.. - # b) assume that N<=4 - # c) all cores in a cluster have the same cpufreq driver, so - # that setting the frequency of one CPU also sets the others. - # With these assumptions, the following will set the LITTLE - # cluster to 'ondemand' then set the big cluster to - # 'performance'. - # Note, no non-big.LITTLE boards support cpufreq so this will - # have no effect on them. - # - echo "ondemand" > /sys/devices/system/cpu/cpu4/cpufreq/scaling_governor 2>/dev/null || true - echo "ondemand" > /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor 2>/dev/null || true - echo "ondemand" > /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor 2>/dev/null || true - echo "ondemand" > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor 2>/dev/null || true - echo "performance" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor 2>/dev/null || true + # On big.LITTLE we want to setup big cores to 'performance' and LITTLE cores + # to 'ondemand'. We assume other systems don't support cpufreq and so are + # unaffected by what we do here... + + set_governor_for_cores() { + part_id=${1} + governor=${2} + IFS=$'\n' + for line in `cat /proc/cpuinfo | tr '[:blank:]' ' ' ` + do + cpu_try=`echo "$line" | sed -n -e 's/^processor : \([0-9][0-9]*\)$/\1/p'` + if [ -n "$cpu_try" ] + then + cpu=${cpu_try} + else + part_id_try=`echo "$line" | sed -n -e 's/^CPU part : \(.*\)$/\1/p'` + if [ "$part_id_try" = "$part_id" ] + then + echo "$governor" > /sys/devices/system/cpu/cpu${cpu}/cpufreq/scaling_governor || true + fi + fi + done + } + + set_governor_for_cores 0xc07 ondemand # A7 cores + set_governor_for_cores 0xc0f performance # A15 cores + end script |