Re: [RFC][PATCH 0/3] c-state governor changes

2012-08-23 Thread Matthew Garrett
On Thu, Aug 23, 2012 at 02:54:05PM -0700, Arjan van de Ven wrote: > On 8/23/2012 2:11 PM, Rik van Riel wrote: > > This patch set is mostly there to kick off a discussion in time > > for Kernel Summit. When running it on my laptop, with acpi_idle, > > I see a promising change in powertop. > > be

Re: [RFC][PATCH 0/3] c-state governor changes

2012-08-23 Thread Rik van Riel
On 08/23/2012 05:54 PM, Arjan van de Ven wrote: On 8/23/2012 2:11 PM, Rik van Riel wrote: This patch set is mostly there to kick off a discussion in time for Kernel Summit. When running it on my laptop, with acpi_idle, I see a promising change in powertop. be careful with acpi_idle... that

Re: [RFC][PATCH 0/3] c-state governor changes

2012-08-23 Thread Arjan van de Ven
> Please let me know what you think :) > btw on what kind of hardware are you seeing the issues ? -- 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

Re: [RFC][PATCH 0/3] c-state governor changes

2012-08-23 Thread Arjan van de Ven
On 8/23/2012 2:11 PM, Rik van Riel wrote: > This patch set is mostly there to kick off a discussion in time > for Kernel Summit. When running it on my laptop, with acpi_idle, > I see a promising change in powertop. be careful with acpi_idle... that will remove most of the intermediate C states

[RFC][PATCH 0/3] c-state governor changes

2012-08-23 Thread Rik van Riel
It turns out that the c-state governor can be a performance issue with certain workloads. The problem workloads seem to involve mixed length pauses between activities, eg. an occasional long idle period, with a burst of activity involving short idle periods. One example of this would be a system

[RFC][PATCH 0/3] c-state governor changes

2012-08-23 Thread Rik van Riel
It turns out that the c-state governor can be a performance issue with certain workloads. The problem workloads seem to involve mixed length pauses between activities, eg. an occasional long idle period, with a burst of activity involving short idle periods. One example of this would be a system

Re: [RFC][PATCH 0/3] c-state governor changes

2012-08-23 Thread Arjan van de Ven
On 8/23/2012 2:11 PM, Rik van Riel wrote: This patch set is mostly there to kick off a discussion in time for Kernel Summit. When running it on my laptop, with acpi_idle, I see a promising change in powertop. be careful with acpi_idle... that will remove most of the intermediate C states the

Re: [RFC][PATCH 0/3] c-state governor changes

2012-08-23 Thread Arjan van de Ven
Please let me know what you think :) btw on what kind of hardware are you seeing the issues ? -- 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

Re: [RFC][PATCH 0/3] c-state governor changes

2012-08-23 Thread Rik van Riel
On 08/23/2012 05:54 PM, Arjan van de Ven wrote: On 8/23/2012 2:11 PM, Rik van Riel wrote: This patch set is mostly there to kick off a discussion in time for Kernel Summit. When running it on my laptop, with acpi_idle, I see a promising change in powertop. be careful with acpi_idle... that

Re: [RFC][PATCH 0/3] c-state governor changes

2012-08-23 Thread Matthew Garrett
On Thu, Aug 23, 2012 at 02:54:05PM -0700, Arjan van de Ven wrote: On 8/23/2012 2:11 PM, Rik van Riel wrote: This patch set is mostly there to kick off a discussion in time for Kernel Summit. When running it on my laptop, with acpi_idle, I see a promising change in powertop. be careful