What means RTT?

[GoogleCodeExporter]

With my ATi:

Running benchmark for at least 60 seconds...

#1: 'ATI-Stream device 1': 146.93 PMKs/s (Occupancy 96.65%; RTT 55.8 secs)
#2: 'CPU-Core (SSE2)': 609.38 PMKs/s (Occupancy 76.26%; RTT 2.7 secs)

Benchmark done. 756.31 PMKs/s total.

Without my ATi.

Running benchmark for at least 60 seconds...

#1: 'CPU-Core (SSE2)': 598.81 PMKs/s (Occupancy 97.91%; RTT 2.8 secs)
#2: 'CPU-Core (SSE2)': 603.63 PMKs/s (Occupancy 99.81%; RTT 2.7 secs)

Benchmark done. 1202.44 PMKs/s total.

Why RTT of my Radeon HD3470 is more big than RTT of my(s) CPU(s)? It's just
curious.

Original issue reported on code.google.com by nebulos...@gmail.com on 20 Jul 2009 at 6:34

[GoogleCodeExporter]

I forget say that this happens in a Intel Core2 Duo P8400 runnig at 2.26GHz

Original comment by nebulos...@gmail.com on 20 Jul 2009 at 6:37

[GoogleCodeExporter]

Wow that is one slow GPU you got there :-)

'RTT' means (average) Round Trip Time. It is the average time in seconds a core
spends computing per call to hardware; for efficiency reasons we target a 
execution
time of 3 seconds per call.

The ATI-Core is special as it does not schedule based on it's own performance 
but
always pulls exactly 8192 passwords from the global queue. 8192 / 146 = 146.93 
= 55.75

Original comment by lukas.l...@gmail.com on 20 Jul 2009 at 8:48

• Changed state: Done
• Added labels: Type-Other
• Removed labels: Type-Defect