Re: CUDA Bitmap plugin

On Friday 09 May 2008 01:03:35 Evan Lezar wrote:
> major contributor, but the CUDA plugin still  manages to kill the CPU
> implementation (on my ageing 3500+ at least) by a factor 20x or more in
> many of the cases considered.  I would like to improve the benchmark system
> though - so I think that will be my nexy step - although the other image
> processing plugins should be a breeze now.  Once the benchmark system is up
> to scratch, then the users out there with different hardware can start
> making submissions so that we can get a nice idea of the landscape.


Agreed!

In the meantime, here are some timings from my machine with the current
system, using a "Release" (optimized) build config:

Bitmap size 1024x1024
 INFO: Bitmap timing : 0.0594871
 INFO: CUDA timing : 0.00894213 | 3.50475e-05 | 0.0123601 || 0.0213373
Bitmap size 2048x2048
 INFO: Bitmap timing : 0.15617
 INFO: CUDA timing : 0.034425 | 3.50475e-05 | 0.048115 || 0.0825751
Bitmap size 4096x4096
 INFO: Bitmap timing : 0.624539
 INFO: CUDA timing : 0.134559 | 3.50475e-05 | 0.19217 || 0.326764

My GPU:
There is 1 device supporting CUDA

Device 0: "GeForce 8800 GT"
  Major revision number:                         1
  Minor revision number:                         1
  Total amount of global memory:                 536150016 bytes
  Total amount of constant memory:               65536 bytes
  Total amount of shared memory per block:       16384 bytes
  Total number of registers available per block: 8192
  Warp size:                                     32
  Maximum number of threads per block:           512
  Maximum sizes of each dimension of a block:    512 x 512 x 64
  Maximum sizes of each dimension of a grid:     65535 x 65535 x 1
  Maximum memory pitch:                          262144 bytes
  Texture alignment:                             256 bytes
  Clock rate:                                    1512000 kilohertz

My CPU is a dual core, with the stats for one core:
model name      :               Intel(R) Pentium(R) D CPU 3.00GHz
stepping        : 4
cpu MHz         : 2992.578
cache size      : 1024 KB

Regards,

Bart

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