Re: 3.10.0: Full dynticks = high load
On Mon, 15 Jul 2013 17:01:35 +0200 Frederic Weisbecker wrote: > On Mon, Jul 15, 2013 at 11:51:18AM -0300, Dâniel Fraga wrote: > > The problem is that when we use the new Full dynticks option > > form kernel 3.10.0, the load will go high, always above 1. Bug? > > You mean this is the result that the "uptime" command gives you? And > your system is doing something? Or is it mostly idle? It is idle, but the load remains high all the time. Going back to the "Idle dynticks system (tickless idle)" solves the problem. So the issue is with the new Full dynticks. -- Linux 3.10.0: Unicycling Gorilla http://www.youtube.com/DanielFragaBR http://www.libertarios.org.br -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: 3.10.0: Full dynticks = high load
On Mon, Jul 15, 2013 at 11:51:18AM -0300, Dâniel Fraga wrote: > On Mon, 15 Jul 2013 16:25:59 +0200 > Frederic Weisbecker wrote: > > > Hi, > > > > Sorry I'm missing the description of the issue. Could you please > > repaste it? > > > > Thanks! > > The problem is that when we use the new Full dynticks option > form kernel 3.10.0, the load will go high, always above 1. Bug? You mean this is the result that the "uptime" command gives you? And your system is doing something? Or is it mostly idle? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: 3.10.0: Full dynticks = high load
On Mon, 15 Jul 2013 16:25:59 +0200 Frederic Weisbecker wrote: > Hi, > > Sorry I'm missing the description of the issue. Could you please > repaste it? > > Thanks! The problem is that when we use the new Full dynticks option form kernel 3.10.0, the load will go high, always above 1. Bug? -- Linux 3.10.0: Unicycling Gorilla http://www.youtube.com/DanielFragaBR http://www.libertarios.org.br -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: 3.10.0: Full dynticks = high load
On Mon, Jul 15, 2013 at 03:36:46PM +0200, Mike Galbraith wrote: > (add cc) > > On Mon, 2013-07-15 at 10:05 -0300, Dâniel Fraga wrote: > > On Fri, 12 Jul 2013 08:52:27 +0200 > > Heinz Diehl wrote: > > > > > This describes exactly what I have encountered, and "tickless idle" > > > fixed it for me, too. So I'll second that. > > > > Thanks for the confirmation. I hope Ingo Molnar fixes it. > > > > Hi, Sorry I'm missing the description of the issue. Could you please repaste it? Thanks! -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: 3.10.0: Full dynticks = high load
(add cc) On Mon, 2013-07-15 at 10:05 -0300, Dâniel Fraga wrote: > On Fri, 12 Jul 2013 08:52:27 +0200 > Heinz Diehl wrote: > > > This describes exactly what I have encountered, and "tickless idle" > > fixed it for me, too. So I'll second that. > > Thanks for the confirmation. I hope Ingo Molnar fixes it. > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: 3.10.0: Full dynticks = high load
On Fri, 12 Jul 2013 08:52:27 +0200 Heinz Diehl wrote: > This describes exactly what I have encountered, and "tickless idle" > fixed it for me, too. So I'll second that. Thanks for the confirmation. I hope Ingo Molnar fixes it. -- Linux 3.10.0: Unicycling Gorilla http://www.youtube.com/DanielFragaBR http://www.libertarios.org.br -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: 3.10.0: Full dynticks = high load
On 11.07.2013, Dâniel Fraga wrote: > I upgraded to kernel 3.10.0 and decided to try the new "Full > dynticks system (tickless)" option, but now the system load is always > at 1 or above. > > Using the previous "Idle dynticks system (tickless idle)" solves > the problem, so it seems the new Full dynticks code is causing this. > This describes exactly what I have encountered, and "tickless idle" fixed it for me, too. So I'll second that. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
3.10.0: Full dynticks = high load
I upgraded to kernel 3.10.0 and decided to try the new "Full dynticks system (tickless)" option, but now the system load is always at 1 or above. Using the previous "Idle dynticks system (tickless idle)" solves the problem, so it seems the new Full dynticks code is causing this. Maybe Ingo Molnar can help to debug this (I put this in Power Management, but if it should be in other area, please change). My desktop is: Asus P8Z68-V Pro/Gen3 Core i7 2700k 8GB RAM Feel free to suggest how can I debug this to help you. I can try patches if you want. Thank you. -- Linux 3.10.0: Unicycling Gorilla http://www.youtube.com/DanielFragaBR http://www.libertarios.org.br -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/