Series-reviewed-by: Chengwen Feng <fengcheng...@huawei.com>
On 2024/9/12 10:38, Huisong Li wrote:
> The deeper the idle state, the lower the power consumption, but the longer
> the resume time. Some service are delay sensitive and very except the low
> resume time, like interrupt packet receiving mode.
>
> And the "/sys/devices/system/cpu/cpuX/power/pm_qos_resume_latency_us" sysfs
> interface is used to set and get the resume latency limit on the cpuX for
> userspace. Please see the description in kernel document[1].
> Each cpuidle governor in Linux select which idle state to enter based on
> this CPU resume latency in their idle task.
>
> The per-CPU PM QoS API can be used to control this CPU's idle state
> selection and limit just enter the shallowest idle state to low the delay
> after sleep by setting strict resume latency (zero value).
>
> [1]
> https://www.kernel.org/doc/html/latest/admin-guide/abi-testing.html?highlight=pm_qos_resume_latency_us#abi-sys-devices-power-pm-qos-resume-latency-us
>
> ---
> v10:
> - replace LINE_MAX with a custom macro and fix two typos.
> v9:
> - move new feature description from release_24_07.rst to release_24_11.rst.
> v8:
> - update the latest code to resolve CI warning
> v7:
> - remove a dead code rte_lcore_is_enabled in patch[2/2]
> v6:
> - update release_24_07.rst based on dpdk repo to resolve CI warning.
> v5:
> - use LINE_MAX to replace BUFSIZ, and use snprintf to replace sprintf.
> v4:
> - fix some comments basd on Stephen
> - add stdint.h include
> - add Acked-by Morten Brørup <m...@smartsharesystems.com>
> v3:
> - add RTE_POWER_xxx prefix for some macro in header
> - add the check for lcore_id with rte_lcore_is_enabled
> v2:
> - use PM QoS on CPU wide to replace the one on system wide
>
> Huisong Li (2):
> power: introduce PM QoS API on CPU wide
> examples/l3fwd-power: add PM QoS configuration
>
> doc/guides/prog_guide/power_man.rst | 24 ++++++
> doc/guides/rel_notes/release_24_11.rst | 5 ++
> examples/l3fwd-power/main.c | 24 ++++++
> lib/power/meson.build | 2 +
> lib/power/rte_power_qos.c | 111 +++++++++++++++++++++++++
> lib/power/rte_power_qos.h | 73 ++++++++++++++++
> lib/power/version.map | 4 +
> 7 files changed, 243 insertions(+)
> create mode 100644 lib/power/rte_power_qos.c
> create mode 100644 lib/power/rte_power_qos.h
>
