A rather popular problem reported by new users on irc is very
laggy performance out of the box. The default 'ondemand' governor
is too slow to react on increased demand for processing power
without extra tuning. The extra tuning needs extra efforts
from the users. Not to mention that they have to be aware that
such tuning might be necessary.
One more reason not to use the 'ondemand' governor by default is
that the power saving provided by it is not particularly good:
https://www.mail-archive.com/linux-sunxi@googlegroups.com/msg00492.html
https://www.mail-archive.com/linux-sunxi@googlegroups.com/msg00678.html
http://www.cubieforums.com/index.php/topic,1413.msg8745.html#msg8745
It basically wastes a lot of performance for almost nothing.
The most important defconfigs are sun4i_defconfig, sun5i_defconfig
and sun7i_defconfig because they are mentioned in
http://linux-sunxi.org/Linux_Kernel#Compilation
Right now sun5i_defconfig does not even enable cpufreq and does not
have any problems in the first place. This patch changes sun4i and
sun7i defconfigs to have the following set of cpufreq governors:
1. 'performance' (default)
2. 'userspace' (for benchmarking purposes)
3. 'interactive' (a replacement for 'ondemand' with more sane
default behavior)
Signed-off-by: Siarhei Siamashka <siarhei.siamas...@gmail.com>
---
arch/arm/configs/sun4i_defconfig | 5 ++---
arch/arm/configs/sun7i_defconfig | 12 +-----------
2 files changed, 3 insertions(+), 14 deletions(-)
diff --git a/arch/arm/configs/sun4i_defconfig b/arch/arm/configs/sun4i_defconfig
index 4e6f9fc..edcafc1 100644
--- a/arch/arm/configs/sun4i_defconfig
+++ b/arch/arm/configs/sun4i_defconfig
@@ -14,7 +14,6 @@ CONFIG_CGROUPS=y
CONFIG_CGROUP_FREEZER=y
CONFIG_CGROUP_DEVICE=y
CONFIG_CPUSETS=y
-CONFIG_CGROUP_CPUACCT=y
CONFIG_RESOURCE_COUNTERS=y
CONFIG_BLK_CGROUP=y
CONFIG_RELAY=y
@@ -52,8 +51,8 @@ CONFIG_COMPACTION=y
CONFIG_KSM=y
CONFIG_CMDLINE="mem=448M@0x40000000 console=ttyS0,115200"
CONFIG_CPU_FREQ=y
-CONFIG_CPU_FREQ_STAT=m
-CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
+CONFIG_CPU_FREQ_GOV_USERSPACE=y
+CONFIG_CPU_FREQ_GOV_INTERACTIVE=y
CONFIG_CPU_FREQ_DVFS=y
CONFIG_CPU_IDLE=y
CONFIG_VFP=y
diff --git a/arch/arm/configs/sun7i_defconfig b/arch/arm/configs/sun7i_defconfig
index 455ebcc..c585d7a 100644
--- a/arch/arm/configs/sun7i_defconfig
+++ b/arch/arm/configs/sun7i_defconfig
@@ -16,15 +16,11 @@ CONFIG_CGROUPS=y
CONFIG_CGROUP_FREEZER=y
CONFIG_CGROUP_DEVICE=y
CONFIG_CPUSETS=y
-CONFIG_CGROUP_CPUACCT=y
CONFIG_RESOURCE_COUNTERS=y
CONFIG_CGROUP_MEM_RES_CTLR=y
CONFIG_CGROUP_MEM_RES_CTLR_SWAP=y
CONFIG_CGROUP_MEM_RES_CTLR_KMEM=y
CONFIG_CGROUP_PERF=y
-CONFIG_CGROUP_SCHED=y
-CONFIG_CFS_BANDWIDTH=y
-CONFIG_RT_GROUP_SCHED=y
CONFIG_BLK_CGROUP=y
CONFIG_RELAY=y
CONFIG_BLK_DEV_INITRD=y
@@ -67,14 +63,8 @@ CONFIG_KSM=y
CONFIG_CMDLINE="console=ttyS0,115200 root=/dev/mmc0p1 rw init=/init loglevel=8"
CONFIG_KEXEC=y
CONFIG_CPU_FREQ=y
-CONFIG_CPU_FREQ_STAT=m
-CONFIG_CPU_FREQ_DEFAULT_GOV_FANTASY=y
-CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
-CONFIG_CPU_FREQ_GOV_POWERSAVE=m
-CONFIG_CPU_FREQ_GOV_USERSPACE=m
-CONFIG_CPU_FREQ_GOV_ONDEMAND=y
+CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_GOV_INTERACTIVE=y
-CONFIG_CPU_FREQ_GOV_CONSERVATIVE=m
CONFIG_CPU_FREQ_USR_EVNT_NOTIFY=y
CONFIG_CPU_FREQ_DVFS=y
CONFIG_CPU_IDLE=y
--
1.8.3.2
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