Re: [PATCH] sched: Further restrict the preemption modes

Ciunas Bennett
2026-02-25T09:56:48Z

On 24/02/2026 17:11, Sebastian Andrzej Siewior wrote:
> On 2026-02-24 15:45:39 [+0000], Ciunas Bennett wrote:

>> Changing guest configuration to disable mergeable RX buffers:
>> <host mrg_rxbuf="off"/>
>> had a clear effect on throughput:
>> PREEMPT_LAZY: throughput improved from 40 Gb/s → 60 Gb/s
>>
>
> Brings this the workload/ test to PREEMPT_FULL level?
>

Sorry was not clear here, so when I enable this there is also an improvement in PREEMPT_FULL
from 55Gb/s -> 60Gb/s

So I see an improvement in both test cases.
PREEMPT_LAZY: throughput improved from 40 Gb/s → 60 Gb/s
PREEMPT_FULL: throughput improved from 55 Gb/s → 60 Gb/s