> 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.
