[AT] NVIDIA Denver performance

[jfpoole]

Sorry, I was indeed considering recent scores with b.L systems... Can you explain how you get frequency? It's interesting that Nexus 9 is reported at 2.5GHz instead of the marketed 2.3. Perhaps some form of turbo?

We're reading the maximum frequency from /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq (which is 2499000 on a Nexus 9). /sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state shows that the device never goes beyond 2295 MHz, though:

shell@flounder:/ $ cat /sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state
204000 0
229500 0
255000 0
280500 0
306000 0
331500 0
357000 0
382500 0
408000 21764
433500 0
459000 0
484500 0
510000 1526101
535500 3321
561000 3507
586500 3255
612000 3550
637500 12135
663000 1087
688500 1279
714000 864
739500 538
765000 465
790500 324
816000 242
841500 165
867000 208
892500 216
918000 114
943500 178
969000 148
994500 130
1020000 64470
1122000 135
1224000 207
1326000 101
1428000 215
1530000 28033
1632000 689
1734000 964
1836000 2760
1938000 526
2014500 1195
2091000 1706
2193000 2626
2295000 29154
2397000 0
2499000 0

We'll see if we can incorporate this information into the frequency determination code.