Re: [PATCH v3 1/3] cpufreq: ondemand: Change the calculation of target frequency

2013-06-06 Thread David C Niemi
On 06/06/13 05:55, Borislav Petkov wrote: > Please do not top-post. > > On Wed, Jun 05, 2013 at 12:58:33PM -0400, David C Niemi wrote: >> When you are doing a locally-originated truly CPU-bound task, "race to >> idle" does make some sense. But I can think of a cou

Re: [PATCH v3 1/3] cpufreq: ondemand: Change the calculation of target frequency

2013-06-06 Thread David C Niemi
On 06/06/13 05:55, Borislav Petkov wrote: Please do not top-post. On Wed, Jun 05, 2013 at 12:58:33PM -0400, David C Niemi wrote: When you are doing a locally-originated truly CPU-bound task, race to idle does make some sense. But I can think of a couple of caveats. 1) If you care about

Re: [PATCH v3 1/3] cpufreq: ondemand: Change the calculation of target frequency

2013-06-05 Thread David C Niemi
When you are doing a locally-originated truly CPU-bound task, "race to idle" does make some sense. But I can think of a couple of caveats. 1) If you care about power consumption, you want to avoid super-power-hungry turbo states, as you get less done per watt-hour than in some of the middle

Re: [PATCH v3 1/3] cpufreq: ondemand: Change the calculation of target frequency

2013-06-05 Thread David C Niemi
When you are doing a locally-originated truly CPU-bound task, race to idle does make some sense. But I can think of a couple of caveats. 1) If you care about power consumption, you want to avoid super-power-hungry turbo states, as you get less done per watt-hour than in some of the middle

Re: [PATCH v2 1/3] cpufreq: ondemand: Change the calculation of target frequency

2013-06-04 Thread David C Niemi
Thanks for the detailed response. I am heartened by the edge cases (true idle and above up_threshold) remaining the same, that sounds like it should cover a lot of ground well. David C Niemi On 06/04/13 11:20, Stratos Karafotis wrote: > Hi David, > Thanks for your comments! >

Re: [PATCH v2 1/3] cpufreq: ondemand: Change the calculation of target frequency

2013-06-04 Thread David C Niemi
Thanks for the detailed response. I am heartened by the edge cases (true idle and above up_threshold) remaining the same, that sounds like it should cover a lot of ground well. David C Niemi On 06/04/13 11:20, Stratos Karafotis wrote: Hi David, Thanks for your comments! In your case

Re: [PATCH v2 1/3] cpufreq: ondemand: Change the calculation of target frequency

2013-06-03 Thread David C Niemi
er average frequencies and gets its performance boost from that. David C Niemi On 06/03/13 15:47, Stratos Karafotis wrote: > Ondemand calculates load in terms of frequency and increases it only > if the load_freq is greater than up_threshold multiplied by current > or average frequency. Th

Re: [PATCH v2 1/3] cpufreq: ondemand: Change the calculation of target frequency

2013-06-03 Thread David C Niemi
frequencies and gets its performance boost from that. David C Niemi On 06/03/13 15:47, Stratos Karafotis wrote: Ondemand calculates load in terms of frequency and increases it only if the load_freq is greater than up_threshold multiplied by current or average frequency. This seems to produce

Re: [PATCH 2/3 linux-next] cpufreq: conservative: Fix the logic in frequency decrease checking

2013-03-06 Thread David C Niemi
The "10" sounds like an attempt to add some hysteresis to the up/down decisionmaking. If you take it out, you should make sure you don't get into situations where you're continually switching rapidly between two frequencies. (In the ondemand governor some care was also taken to avoid the cost

Re: [PATCH 2/3 linux-next] cpufreq: conservative: Fix the logic in frequency decrease checking

2013-03-06 Thread David C Niemi
The 10 sounds like an attempt to add some hysteresis to the up/down decisionmaking. If you take it out, you should make sure you don't get into situations where you're continually switching rapidly between two frequencies. (In the ondemand governor some care was also taken to avoid the cost

Re: [PATCH linux-next] cpufreq: conservative: Fix sampling_down_factor functionality

2013-03-05 Thread David C Niemi
I am the author of sampling_down_factor. I only intended it to have an effect if you are already attempting to achieve maximum performance (e.g. at the top available clock speed for the current infrastructure). This is special because there is no possibility of going any faster so the only

Re: [PATCH linux-next] cpufreq: conservative: Fix sampling_down_factor functionality

2013-03-05 Thread David C Niemi
these days as differentiated from the ondemand governor? At one time it seemed more oriented towards power savings, but the ondemand governor had picked up most or all of its power-saving features. DCN On 03/05/13 09:11, David C Niemi wrote: > I am the author of sampling_down_factor. I o

Re: [PATCH linux-next] cpufreq: conservative: Fix sampling_down_factor functionality

2013-03-05 Thread David C Niemi
these days as differentiated from the ondemand governor? At one time it seemed more oriented towards power savings, but the ondemand governor had picked up most or all of its power-saving features. DCN On 03/05/13 09:11, David C Niemi wrote: I am the author of sampling_down_factor. I only

Re: [PATCH linux-next] cpufreq: conservative: Fix sampling_down_factor functionality

2013-03-05 Thread David C Niemi
I am the author of sampling_down_factor. I only intended it to have an effect if you are already attempting to achieve maximum performance (e.g. at the top available clock speed for the current infrastructure). This is special because there is no possibility of going any faster so the only

Snoozy Ethernet Interfaces in 2.4testX?

2000-09-05 Thread David C Niemi
be a great help. - David C. Niemi (Reston, Virginia, USA) [EMAIL PROTECTED] Know the difference between the color of the wine and the color of the glass. (Jalaluddin Rumi) - - To unsubscribe

Snoozy Ethernet Interfaces in 2.4testX?

2000-09-05 Thread David C Niemi
be a great help. - David C. Niemi (Reston, Virginia, USA) [EMAIL PROTECTED] Know the difference between the color of the wine and the color of the glass. (Jalaluddin Rumi) - - To unsubscribe