On Tue, 6 Nov 2012 21:09:58 +0800 Alex Shi <alex....@intel.com> wrote:
> $for ((i=0; i < I; i++)) ; do while true; do : ; done & done > > Checking the power consuming with a powermeter on the NHM EP. > powersaving performance > I = 2 148w 160w > I = 4 175w 181w > I = 8 207w 224w > I = 16 324w 324w > > On a SNB laptop(4 cores *HT) > powersaving performance > I = 2 28w 35w > I = 4 38w 52w > I = 6 44w 54w > I = 8 56w 56w > > On the SNB EP machine, when I = 16, power saved more than 100 Watts. Confused. According to the above table, at I=16 the EP machine saved 0 watts. Typo in the data? Also, that's a pretty narrow test - it's doing fork and exec at very high frequency and things such as task placement decisions at process startup might be affecting the results. Also, the load will be quite kernel-intensive, as opposed to the more typical userspace-intensive loads. So, please run a broader set of tests so we can see the effects? -- 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/
