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authorRonan Le Martret <ronan.lemartret@iot.bzh>2022-01-28 15:34:25 +0100
committerJan-Simon Moeller <jsmoeller@linuxfoundation.org>2022-02-15 22:13:45 +0000
commit0a9a6ddd2af2016b4c83c737afcd1f2ebedcd83b (patch)
tree46b25618656ccc77d2f5f4f5f44f5674c433ef2e /meta-agl-ic
parentb4d2fd5d4aca191c7960e099c1dcf02fdab46cec (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 (cherry picked from commit d32ed899583ab14e6442f76dd1c78695f9c0ec33) Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/27177 ci-image-build: Jenkins Job builder account ci-image-boot-test: Jenkins Job builder account
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