schedule: config to build LL without task rescheduling #9816
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adds a config to instantiate the low-latency scheduler without task rescheduling, given that the operation is optional. Signed-off-by: Johny Lin <johnylin@google.com>
to skip reschedule task for LL scheduler on mt8196 platform. Signed-off-by: Johny Lin <johnylin@google.com>
johnylin76
requested review from
LaurentiuM1234,
dbaluta,
kv2019i,
lbetlej,
lgirdwood,
marcinszkudlinski,
mmaka1,
pblaszko and
plbossart
as code owners
lyakh
reviewed
Feb 7, 2025
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| #if CONFIG_SCHEDULE_LL_NO_RESCHEDULE_TASK | ||
| /* As a null function pointer */ | ||
| #define reschedule_ll_task ((void*)0) |
Contributor
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Both ways are probably fine. The reason I chose ((void*)0) is because NULL in c is also a macro, and I'm not sure if there is any risk when a macro represents as another macro.
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I'd be very surprised if this didn't work. We certainly have macros using macros like across a dozen or more layers. And this is in a C file, so it won't be included in other files to potentially be used in further macro definitions.
kv2019i
approved these changes
Feb 10, 2025
| rescheduling, given that the operation is optional. Under such cases, | ||
| scheduler_ops::reschedule_task will set to NULL instead, tasks with | ||
| the attempt to reschedule (e.g. DMA trace works) will be relinguished | ||
| directly and return no error. |
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I guess this is ok. One option would be to track the dependency to features (like DMA trace) also in Kconfig, but given this is opt-out, this might be too klungy.
lgirdwood
approved these changes
Feb 10, 2025
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adds a kconfig flag to instantiate the low-latency scheduler without task rescheduling, given that the operation is optional.