Article: Nehalem Performance Preview
By: Jack (jumpingjack6.delete@this.verizon.net), April 10, 2009 6:31 pm
Room: Moderated Discussions
slacker (s@lack.er) on 4/10/09 wrote:
---------------------------
>Jack (Jumpingjack6@verizon.net) on 4/10/09 wrote:
>---------------------------
>>Peak power will dictate various thermal cooling designs and such, but total energy
>>consumed determines energy efficiency. A server can have 20% higher peak power
>>but if it completes the task in 50% less time will be more energy efficient.
>
>Only guaranteed to be true if you're strictly looking at the time span to complete
>the task on each server. Otherwise, you need to add the idle energy consumption
>when the faster server is sitting idle. This is what shot the Harpertown platform
>in the foot for workloads which you can imagine.
>
>David: consider writing a short article explaining energy vs. power, and where each metric is relevant.
True, I simplified it. The total energy over a long period depends on many factors, in terms of energy savings the sooner a task completes and gets to idle, caveat -- idle needs to be as low or lower than the competing or existing solution to be of benefit.
The concept is straight forward. A box that demonstrates peak power that is higher can actually be more energy efficient.
jack
---------------------------
>Jack (Jumpingjack6@verizon.net) on 4/10/09 wrote:
>---------------------------
>>Peak power will dictate various thermal cooling designs and such, but total energy
>>consumed determines energy efficiency. A server can have 20% higher peak power
>>but if it completes the task in 50% less time will be more energy efficient.
>
>Only guaranteed to be true if you're strictly looking at the time span to complete
>the task on each server. Otherwise, you need to add the idle energy consumption
>when the faster server is sitting idle. This is what shot the Harpertown platform
>in the foot for workloads which you can imagine.
>
>David: consider writing a short article explaining energy vs. power, and where each metric is relevant.
True, I simplified it. The total energy over a long period depends on many factors, in terms of energy savings the sooner a task completes and gets to idle, caveat -- idle needs to be as low or lower than the competing or existing solution to be of benefit.
The concept is straight forward. A box that demonstrates peak power that is higher can actually be more energy efficient.
jack
Topic | Posted By | Date |
---|---|---|
Nehalem review up | David Kanter | 2009/04/07 02:43 AM |
Nehalem review up | noone | 2009/04/07 05:48 AM |
Strange jbb on Harpertown | Henrik S | 2009/04/07 07:29 AM |
Strange jbb on Harpertown | David Kanter | 2009/04/07 10:19 AM |
Strange jbb on Harpertown | Henrik S | 2009/04/07 08:33 PM |
Strange jbb on Harpertown | Chris | 2009/04/07 11:54 PM |
Strange jbb on Harpertown | Henrik S | 2009/04/08 01:40 AM |
Nehalem review up | Vincent Diepeveen | 2009/04/07 07:34 AM |
Nehalem review up | Jack | 2009/04/09 03:51 PM |
Nehalem review up | Vincent Diepeveen | 2009/04/10 12:58 AM |
Nehalem review up | Michael S | 2009/04/10 02:45 AM |
Nehalem review up | EduardoS | 2009/04/10 06:01 AM |
Nehalem review up | Michael S | 2009/04/10 06:56 AM |
Nehalem review up | Eugene Nalimov | 2009/04/10 08:12 AM |
Choice of C compiler doesn't matter much for Java... | Henrik S | 2009/04/10 09:10 AM |
Choice of C compiler doesn't matter much for Java... | EduardoS | 2009/04/10 01:49 PM |
Choice of C compiler doesn't matter much for Java... | Henrik S | 2009/04/11 06:13 AM |
Choice of C compiler doesn't matter much for Java... | EduardoS | 2009/04/11 10:30 AM |
Large pages | David Kanter | 2009/04/11 01:02 PM |
Choice of C compiler doesn't matter much for Java... | Henrik S | 2009/04/11 10:06 PM |
Choice of C compiler doesn't matter much for Java... | Paul | 2009/04/12 12:53 AM |
Choice of C compiler doesn't matter much for Java... | iz | 2009/04/12 01:59 AM |
Choice of C compiler doesn't matter much for Java... | Henrik S | 2009/04/12 06:37 AM |
Choice of C compiler doesn't matter much for Java... | EduardoS | 2009/04/12 07:08 AM |
Choice of C compiler doesn't matter much for Java... | Henrik S | 2009/04/12 08:25 AM |
Choice of C compiler doesn't matter much for Java... | EduardoS | 2009/04/12 04:24 PM |
Choice of C compiler doesn't matter much for Java... | Henrik S | 2009/04/12 09:18 PM |
Thread costs | David Kanter | 2009/04/12 11:12 PM |
Thread costs | Henrik S | 2009/04/14 01:08 PM |
Choice of C compiler doesn't matter much for Java... | Michael S | 2009/04/11 07:53 AM |
Choice of C compiler doesn't matter much for Java... | Henrik S | 2009/04/11 10:08 PM |
Nehalem review up | Vincent Diepeveen | 2009/04/11 03:50 PM |
Nehalem review up | Michael S | 2009/04/11 04:12 PM |
Nehalem review up | Vincent Diepeveen | 2009/04/12 02:01 AM |
Nehalem review up | Michael S | 2009/04/12 04:07 AM |
Nehalem review up | rwessel | 2009/04/07 01:01 PM |
Nehalem review up | slacker | 2009/04/08 08:11 AM |
Energy vs. power | David Kanter | 2009/04/08 09:11 AM |
Energy vs. power | Vincent Diepeveen | 2009/04/10 01:08 AM |
Energy vs. power | slacker | 2009/04/10 08:26 AM |
Energy vs. power | RagingDragon | 2009/04/10 09:19 AM |
Energy vs. power | David Kanter | 2009/04/10 10:47 AM |
Energy vs. power | Jack | 2009/04/10 03:44 PM |
Energy vs. power | slacker | 2009/04/10 06:00 PM |
Energy vs. power | Jack | 2009/04/10 06:31 PM |
Energy vs. power | David Kanter | 2009/04/10 11:16 PM |
Nehalem review up | rwessel | 2009/04/08 01:32 PM |
Minor font issue | gpriatko | 2009/04/07 03:35 PM |
Minor HTML issue | David Kanter | 2009/04/07 08:38 PM |
Minor HTML issue | David Kanter | 2009/04/07 08:39 PM |
Good work, i look forward to linux and SP2 numbers (NT) | PiedPiper | 2009/04/08 12:52 AM |
Nehalem review up | Joe Chang | 2009/04/10 02:59 AM |