On 19/07/22 05:30, Ankit Jain wrote: > > > > On 18-Jul-2022, at 6:31 PM, Juri Lelli <juri.lelli@xxxxxxxxxx> wrote: > > > > ⚠ External Email > > > > On 18/07/22 07:46, Ankit Jain wrote: > > > > ... > > > >> Hi Juri, > >> > >> Actually, while testing I already included below commits in 4.19-rt : > >> > >> feff2e65efd8d84cf831668e182b2ce73c604bbb (sched/deadline: Unthrottle PI boosted threads while > >> enqueuing) > >> 46fcc4b00c3cca8adb9b7c9afdd499f64e427135 (sched/deadline: Fix stale throttling on de-/boosted tasks) > >> 2279f540ea7d05f22d2f0c4224319330228586bc (sched/deadline: Fix priority inheritance with multiple) > >> 0e3872499de1a1230cef5221607d71aa09264bd5 (kernel/sched: Remove dl_boosted flag comment) > > > > Interesting. > > > > Is the workload you are using to test this easily reproducible? I'd like > > to try that out on my end to check if I see the same (of course the > > issue I was working on goes away with my fix :). > > > > Best, > > Juri > > > > Hi Juri, > > The test with which i am able to hit the issue is as follows: > • Schedule SCHED_FIFO/55 (sched_priority = 55) tasks running infinite loop on all isolated cores. > • spwan 30-40 docker containers in loop (docker load , docker run) > • Immediately after that schedule SCHED_FIFO/55 (sched_priority = 55) tasks running infinite loop on all isolated cores again. > • BUG_ON gets hit almost every time. > System config as follows: > • 4.19-rt kernel > • 40 cpu (0-1 housekeeping, 2-39 isol cpus) > • stalld-1.3.0 with the fixes from latest version (for task starvation avoidance), "tuned" with real-time profile Thanks for the details. Yeah, I should be able to set this up on my end. It might just take a bit though, as I have some pto planned coming up. But, I'll get to it eventually. Thanks again, Juri
