[PATCH v10 0/2] power: introduce PM QoS interface

[lihuisong (C)]

Hi Thomas and Ferruh,

Kindly ping for merge.

/Huisong
在 2024/9/12 11:07, fengchengwen 写道:
> Series-reviewed-by: Chengwen Feng <fengchengwen at huawei.com>
Thanks chengwen.
>
> 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 <mb at 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
>>
> .