From: Ronan Le Martret <ronan.lemartret@iot.bzh> Date: Fri, 28 Jan 2022 14:34:25 +0000 (+0100) Subject: [RCAR] Fix block device performance decreased X-Git-Tag: 12.92.0~2 X-Git-Url: https://gerrit.automotivelinux.org/gerrit/gitweb?a=commitdiff_plain;h=refs%2Fchanges%2F08%2F27108%2F7;p=AGL%2Fmeta-agl.git [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 <ronan.lemartret@iot.bzh> Change-Id: I6d19d92dae9dd8c7977e2034215fce07d8318773 Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/27108 Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org> Tested-by: Jenkins Job builder account --- 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 += " \