On Mon, Jun 29, 2020 at 02:36:51PM +0200, Juri Lelli wrote: > Hi, > > On 16/06/20 22:46, Frederic Weisbecker wrote: > > On Tue, Jun 16, 2020 at 08:57:57AM +0200, Juri Lelli wrote: > > > Sure. Let me know if you find anything. > > > > I managed to reproduce. With "threadirqs" and without > > "tsc=reliable". I see tons of spurious TIMER softirqs. > > Investigation begins! I'll let you know. > > Gentle ping. Any new findings about this issue? Yep, I'm working on a series to reduce timer softirqs. I'm almost done, should post it soon. I believe you guessed right: * Timer tick raises timer softirq * Ksoftirqd wakes up, restarts the tick * Timer tick raises timer softirq * ... Thanks.
