diff options
Diffstat (limited to 'target/linux/mvebu/patches-3.18/061-cpuidle-mvebu-Update-cpuidle-thresholds-for-Armada-X.patch')
-rw-r--r-- | target/linux/mvebu/patches-3.18/061-cpuidle-mvebu-Update-cpuidle-thresholds-for-Armada-X.patch | 66 |
1 files changed, 0 insertions, 66 deletions
diff --git a/target/linux/mvebu/patches-3.18/061-cpuidle-mvebu-Update-cpuidle-thresholds-for-Armada-X.patch b/target/linux/mvebu/patches-3.18/061-cpuidle-mvebu-Update-cpuidle-thresholds-for-Armada-X.patch deleted file mode 100644 index bc0f1a6..0000000 --- a/target/linux/mvebu/patches-3.18/061-cpuidle-mvebu-Update-cpuidle-thresholds-for-Armada-X.patch +++ /dev/null @@ -1,66 +0,0 @@ -From ce6031c89a35cffd5a5992b08377b77f49a004b9 Mon Sep 17 00:00:00 2001 -From: Sebastien Rannou <mxs@sbrk.org> -Date: Fri, 13 Feb 2015 15:55:03 +0100 -Subject: [PATCH] cpuidle: mvebu: Update cpuidle thresholds for Armada XP SOCs - -Originally, the thresholds used in the cpuidle driver for Armada SOCs -were temporarily chosen, leaving room for improvements. - -This commit updates the thresholds for the Armada XP SOCs with values -that positively impact performances: - - without patch with patch vendor kernel - - iperf localhost (gbit/sec) ~3.7 ~6.4 ~5.4 - - ioping tmpfs (iops) ~163k ~206k ~179k - - ioping tmpfs (mib/s) ~636 ~805 ~699 - -The idle power consumption is negatively impacted (proportionally less -than the performance gain), and we are still performing better than -the vendor kernel here: - - without patch with patch vendor kernel - - power consumption idle (W) ~2.4 ~3.2 ~4.4 - - power consumption busy (W) ~8.6 ~8.3 ~8.6 - -There is still room for improvement regarding the value of these -thresholds, they were chosen to mimic the vendor kernel. - -This patch only impacts Armada XP SOCs and was tested on Online Labs -C1 boards. A similar approach can be taken to improve the performances -of the Armada 370 and Armada 38x SOCs. - -Thanks a lot to Thomas Petazzoni, Gregory Clement and Willy Tarreau -for the discussions and tips around this topic. - -Signed-off-by: Sebastien Rannou <mxs@sbrk.org> -Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> -Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com> ---- - drivers/cpuidle/cpuidle-mvebu-v7.c | 8 ++++---- - 1 file changed, 4 insertions(+), 4 deletions(-) - ---- a/drivers/cpuidle/cpuidle-mvebu-v7.c -+++ b/drivers/cpuidle/cpuidle-mvebu-v7.c -@@ -50,18 +50,18 @@ static struct cpuidle_driver armadaxp_id - .states[0] = ARM_CPUIDLE_WFI_STATE, - .states[1] = { - .enter = mvebu_v7_enter_idle, -- .exit_latency = 10, -+ .exit_latency = 100, - .power_usage = 50, -- .target_residency = 100, -+ .target_residency = 1000, - .flags = CPUIDLE_FLAG_TIME_VALID, - .name = "MV CPU IDLE", - .desc = "CPU power down", - }, - .states[2] = { - .enter = mvebu_v7_enter_idle, -- .exit_latency = 100, -+ .exit_latency = 1000, - .power_usage = 5, -- .target_residency = 1000, -+ .target_residency = 10000, - .flags = CPUIDLE_FLAG_TIME_VALID | - MVEBU_V7_FLAG_DEEP_IDLE, - .name = "MV CPU DEEP IDLE", |