From d32ed899583ab14e6442f76dd1c78695f9c0ec33 Mon Sep 17 00:00:00 2001 From: Ronan Le Martret Date: Fri, 28 Jan 2022 15:34:25 +0100 Subject: [RCAR] Fix block device performance decreased * After the RCAR BSP 5.5.O, the block device performance decreased. The root cause is a change in the default kernel configuration of the BSP (CPU Frequency scaling) from (RCAR BSP 4.7.0): CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y \# CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL is not set To its new default (RCAR BSP 5.5.0) \# CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL=y You can check current value at runtime using: cat /sys/devices/system/cpu/cpufreq/policy0/scaling_governor cat /sys/devices/system/cpu/cpufreq/policy4/scaling_governor To mediate the regression we do switch back to the PERFORMANCE governor. Bug-AGL: SPEC-4205 Signed-off-by: Ronan Le Martret Change-Id: I6d19d92dae9dd8c7977e2034215fce07d8318773 Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/27108 Reviewed-by: Jan-Simon Moeller Tested-by: Jenkins Job builder account --- .../meta-rcar-gen3/recipes-kernel/linux/files/Set_GOV_PERFORMANCE.cfg | 2 ++ .../meta-rcar-gen3/recipes-kernel/linux/linux-renesas_%.bbappend | 1 + 2 files changed, 3 insertions(+) create mode 100644 meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/files/Set_GOV_PERFORMANCE.cfg (limited to 'meta-agl-bsp') diff --git a/meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/files/Set_GOV_PERFORMANCE.cfg b/meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/files/Set_GOV_PERFORMANCE.cfg new file mode 100644 index 000000000..b020174e8 --- /dev/null +++ b/meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/files/Set_GOV_PERFORMANCE.cfg @@ -0,0 +1,2 @@ +CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y +# CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL is not set diff --git a/meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/linux-renesas_%.bbappend b/meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/linux-renesas_%.bbappend index eccac305a..3665664e0 100644 --- a/meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/linux-renesas_%.bbappend +++ b/meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/linux-renesas_%.bbappend @@ -8,6 +8,7 @@ SRC_URI:append = " \ " AGL_KCONFIG_FRAGMENTS += "namespace_fix.cfg" +AGL_KCONFIG_FRAGMENTS += "Set_GOV_PERFORMANCE.cfg" # For Xen AGL_KCONFIG_FRAGMENTS += " \ -- cgit 1.2.3-korg