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authorRonan Le Martret <ronan.lemartret@iot.bzh>2022-01-28 15:34:25 +0100
committerJan-Simon Moeller <jsmoeller@linuxfoundation.org>2022-02-02 11:49:26 +0000
commitd32ed899583ab14e6442f76dd1c78695f9c0ec33 (patch)
tree89c94e5dc1feb6855b403649e01088806c8b2282 /meta-agl-bsp/meta-rcar-gen3/recipes-kernel/kernel-module-vspmif
parenta12a83ebdfcd4287264e50edf3b11a156f418ae9 (diff)
[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
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