Original post is here: eklausmeier.goip.de
I ran below commands under different load for my Gigabyte GTX 560 graphic card.
export LD_LIBRARY_PATH=$CUDA_PATH/lib64
time /usr/local/cuda/samples/sdk/0_Simple/matrixMul/matrixMul
time /usr/local/cuda/samples/sdk/0_Simple/matrixMulCUBLAS/matrixMulCUBLAS
I was interested in the value GFlop/s.
[more_WP_Tag]
| Test case | console | X11 |
|---|---|---|
| Nothing | 127.03 | n/a |
| GPUGrid | 82.67 | 127.05 |
| GPUGrid+Chrome | n/a | 83.52 |
| CUBLAS: Nothing | 451.85 | 442.50 |
| CUBLAS: GPUGrid | 186.41 | n/a |
| CUBLAS: GPUGrid+Chrome | n/a | 212.73 |
So one can clearly see that matrix multiplication using CUBLAS is 3.5-times faster than matrix multiplication without CUBLAS.
Furthermore, the more load you put on the graphic card the slower the matrix multiplication.
When GPUGrid runs nvidia-smi returns the following information:
Wed Jun 19 23:26:13 2013
+------------------------------------------------------+
| NVIDIA-SMI 4.310.44 Driver Version: 310.44 |
|-------------------------------+----------------------+----------------------+
| GPU Name | Bus-Id Disp. | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|===============================+======================+======================|
| 0 GeForce GTX 560 | 0000:01:00.0 N/A | N/A |
| 54% 52C N/A N/A / N/A | 30% 303MB / 1023MB | N/A Default |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Compute processes: GPU Memory |
| GPU PID Process name Usage |
|=============================================================================|
| 0 Not Supported |
+-----------------------------------------------------------------------------+
Temperature is as below, given by sensors:
fam15h_power-pci-00c4
Adapter: PCI adapter
power1: 39.34 W (crit = 124.95 W)
k10temp-pci-00c3
Adapter: PCI adapter
temp1: +18.5°C (high = +70.0°C)
(crit = +90.0°C, hyst = +87.0°C)
it8721-isa-0290
Adapter: ISA adapter
in0: +2.80 V (min = +2.41 V, max = +2.32 V) ALARM
in1: +2.78 V (min = +0.19 V, max = +2.09 V) ALARM
in2: +0.83 V (min = +0.01 V, max = +1.03 V)
+3.3V: +3.31 V (min = +2.88 V, max = +4.63 V)
in4: +0.34 V (min = +1.10 V, max = +1.34 V) ALARM
in5: +2.52 V (min = +1.24 V, max = +0.60 V) ALARM
in6: +2.35 V (min = +0.14 V, max = +1.16 V) ALARM
3VSB: +4.82 V (min = +0.00 V, max = +4.78 V) ALARM
Vbat: +3.34 V
fan1: 437 RPM (min = 39 RPM)
fan2: 0 RPM (min = 22 RPM) ALARM
fan3: 1421 RPM (min = 17 RPM)
temp1: +38.0°C (low = -47.0°C, high = +51.0°C) sensor = thermistor
temp2: +38.0°C (low = -101.0°C, high = -61.0°C) ALARM sensor = thermistor
temp3: -128.0°C (low = -22.0°C, high = -11.0°C) sensor = disabled
intrusion0: OK
Outside temperature is 27°.