ACK: [J/realtime][PATCH v4] UBUNTU: [Config] realtime: tweak config for realtime tasks
Joseph Salisbury
joseph.salisbury at canonical.com
Tue Feb 22 16:21:20 UTC 2022
On 2/22/22 08:34, Krzysztof Kozlowski wrote:
> BugLink: https://bugs.launchpad.net/bugs/1961588
>
> Change kernel config to fit Realtime use cases:
>
> 1. CONFIG_WQ_POWER_EFFICIENT_DEFAULT disable: energy saving is not that
> important for Realtime workload but locality of any workqueues (thus
> cache locality and maybe lower latencies) is.
>
> 2. CONFIG_TIMERLAT_TRACER and CONFIG_OSNOISE_TRACER enable: for
> debugging latency issues.
>
> 3. CONFIG_BLK_CGROUP_IOLATENCY enable: for users wanting to have
> guarantees on IO latencies.
>
> 4. CONFIG_IRQ_TIME_ACCOUNTING enable: for fine granularity task IRQ
> accounting.
>
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski at canonical.com>
> Acked-by: Tim Gardner <tim.gardner at canonical.com>
>
> ---
>
> Changes since v3:
> 1. Add annotations note
>
> Changes since v2:
> 1. Add ack
> 2. Add annotations
>
> Changes since v1:
> 1. Correct subject
> ---
> debian.realtime/config/annotations | 13 +++++++++++++
> debian.realtime/config/config.common.ubuntu | 11 ++++++-----
> 2 files changed, 19 insertions(+), 5 deletions(-)
>
> diff --git a/debian.realtime/config/annotations b/debian.realtime/config/annotations
> index 82c1e5ed49ae..7d0cb24c9e2e 100644
> --- a/debian.realtime/config/annotations
> +++ b/debian.realtime/config/annotations
> @@ -25,3 +25,16 @@ CONFIG_NO_HZ_FULL policy<{'amd64': 'y', 'arm64': '
> CONFIG_NO_HZ_FULL mark<ENFORCED>
> CONFIG_RCU_NOCB_CPU policy<{'amd64': 'y', 'arm64': 'y'}>
> CONFIG_RCU_NOCB_CPU mark<ENFORCED>
> +
> +CONFIG_BLK_CGROUP_IOLATENCY policy<{'amd64': 'y', 'arm64': 'y'}>
> +CONFIG_BLK_CGROUP_IOLATENCY mark<ENFORCED> note<LP: #1961588>
> +CONFIG_IRQ_TIME_ACCOUNTING policy<{'amd64': 'y', 'arm64': 'y'}>
> +CONFIG_IRQ_TIME_ACCOUNTING mark<ENFORCED> note<LP: #1961588>
> +
> +CONFIG_OSNOISE_TRACER policy<{'amd64': 'y', 'arm64': 'y'}>
> +CONFIG_OSNOISE_TRACER mark<ENFORCED> note<LP: #1961588>
> +CONFIG_TIMERLAT_TRACER policy<{'amd64': 'y', 'arm64': 'y'}>
> +CONFIG_TIMERLAT_TRACER mark<ENFORCED> note<LP: #1961588>
> +
> +CONFIG_WQ_POWER_EFFICIENT_DEFAULT policy<{'amd64': 'n', 'arm64': 'n'}>
> +CONFIG_WQ_POWER_EFFICIENT_DEFAULT mark<ENFORCED> note<LP: #1961588>
> diff --git a/debian.realtime/config/config.common.ubuntu b/debian.realtime/config/config.common.ubuntu
> index 9d325d4ab744..9cb2a8111c51 100644
> --- a/debian.realtime/config/config.common.ubuntu
> +++ b/debian.realtime/config/config.common.ubuntu
> @@ -983,7 +983,7 @@ CONFIG_BITREVERSE=y
> CONFIG_BLK_CGROUP=y
> CONFIG_BLK_CGROUP_FC_APPID=y
> CONFIG_BLK_CGROUP_IOCOST=y
> -# CONFIG_BLK_CGROUP_IOLATENCY is not set
> +CONFIG_BLK_CGROUP_IOLATENCY=y
> CONFIG_BLK_CGROUP_IOPRIO=y
> CONFIG_BLK_CGROUP_RWSTAT=y
> CONFIG_BLK_DEBUG_FS=y
> @@ -3848,6 +3848,7 @@ CONFIG_HAVE_PREEMPT_LAZY=y
> CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
> CONFIG_HAVE_RELIABLE_STACKTRACE=y
> CONFIG_HAVE_RSEQ=y
> +CONFIG_HAVE_SCHED_AVG_IRQ=y
> CONFIG_HAVE_SETUP_PER_CPU_AREA=y
> CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK=y
> CONFIG_HAVE_STACKPROTECTOR=y
> @@ -4894,7 +4895,7 @@ CONFIG_IRQ_FORCED_THREADING=y
> CONFIG_IRQ_MSI_IOMMU=y
> CONFIG_IRQ_POLL=y
> CONFIG_IRQ_REMAP=y
> -# CONFIG_IRQ_TIME_ACCOUNTING is not set
> +CONFIG_IRQ_TIME_ACCOUNTING=y
> CONFIG_IRQ_WORK=y
> CONFIG_IR_ENE=m
> CONFIG_IR_FINTEK=m
> @@ -7012,7 +7013,7 @@ CONFIG_OPTPROBES=y
> CONFIG_ORANGEFS_FS=m
> CONFIG_ORINOCO_USB=m
> CONFIG_OSF_PARTITION=y
> -# CONFIG_OSNOISE_TRACER is not set
> +CONFIG_OSNOISE_TRACER=y
> CONFIG_OUTPUT_FORMAT="elf64-x86-64"
> CONFIG_OVERLAY_FS=m
> # CONFIG_OVERLAY_FS_INDEX is not set
> @@ -10468,7 +10469,7 @@ CONFIG_TIFM_CORE=m
> CONFIG_TIGON3=m
> CONFIG_TIGON3_HWMON=y
> CONFIG_TIMERFD=y
> -# CONFIG_TIMERLAT_TRACER is not set
> +CONFIG_TIMERLAT_TRACER=y
> CONFIG_TIMER_ACPI=y
> CONFIG_TIMER_IMX_SYS_CTR=y
> CONFIG_TIMER_OF=y
> @@ -11806,7 +11807,7 @@ CONFIG_WM831X_WATCHDOG=m
> CONFIG_WM8350_POWER=m
> CONFIG_WM8350_WATCHDOG=m
> CONFIG_WMI_BMOF=m
> -CONFIG_WQ_POWER_EFFICIENT_DEFAULT=y
> +# CONFIG_WQ_POWER_EFFICIENT_DEFAULT is not set
> # CONFIG_WQ_WATCHDOG is not set
> CONFIG_WWAN=y
> CONFIG_WWAN_HWSIM=m
Acked-by: Joseph Salisbury <joseph.salisbury at canonical.com>
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