Search found 264 matches

by Stan Tomov
Wed May 15, 2013 11:23 pm
Forum: User discussion
Topic: Possible bug dsyevd_gpu test wrong eigenvectors result
Replies: 4
Views: 3499

Re: Possible bug dsyevd_gpu test wrong eigenvectors result

Hi Luis, I just ran the test and reproduced your result on a K20c. I added a check for the factorization though and for the orthogonality and everything looks fine: test> ./benchmark_cpu -N 2000 Reading input file Read succesful Calculating eigenvalues with MKL Quering space... Solving eigenvalues.....
by Stan Tomov
Wed May 01, 2013 6:00 pm
Forum: User discussion
Topic: magma_dsyevd_gpu performance
Replies: 2
Views: 1317

Re: magma_dsyevd_gpu performance

Hello, It depends on your CPU/GPU configuration and the GPU BLAS used. If I use MAGMA BLAS's dsymv, the results on 16 Sandy Bridge CPU cores @2.6 GHz vs. a K20c GPU (13 x 192 CUDA cores @ 0.7 GHz) would look like this tomov:bunsen ~/trunk/testing> ./testing_dsyevd -l MAGMA 1.3.0 device 0: Tesla K20c...
by Stan Tomov
Wed May 01, 2013 12:00 pm
Forum: User discussion
Topic: MAGMA on ARM
Replies: 4
Views: 3670

Re: MAGMA on ARM

Nick,
I am sure there would be many people interested. We will be interested to include a make.inc.arm file in the magma distribution and add CARMA as one more device supported. Some tuning may be needed, e.g., at first just to tune the block sizes in control/get_nb.cpp.
Stan
by Stan Tomov
Sat Mar 02, 2013 3:05 pm
Forum: User discussion
Topic: problem in installing magma 3.0 on ubuntu 12.10 64bit
Replies: 6
Views: 3679

Re: problem in installing magma 3.0 on ubuntu 12.10 64bit

Good, so it looks like the libraries were created. You can ignore that last command for now. I'll double check with the other developers, but it looks like the last command in the Makefile for install should be cat $(MAGMA_DIR)/lib/pkgconfig/magma.pc.in | \ ... instead of cat $(MAGMA_DIR)/lib/pkgcon...
by Stan Tomov
Thu Feb 28, 2013 4:08 pm
Forum: User discussion
Topic: NaN bug in MAGMAblas dgemm
Replies: 2
Views: 2288

Re: NaN bug in MAGMAblas dgemm

Hi Eric, Thanks for the report. Indeed we had a wrong assumption that certain out of bound values will be multiplied by 0 and therefore would be irrelevant for the result - which resulted in this bug when out of bound values are nan, and then nans propagated in the result. The other precisions have ...
by Stan Tomov
Thu Feb 28, 2013 2:51 pm
Forum: User discussion
Topic: problem in installing magma 3.0 on ubuntu 12.10 64bit
Replies: 6
Views: 3679

Re: problem in installing magma 3.0 on ubuntu 12.10 64bit

You have to set -L/bummer/GotoBLAS to show the path where libgoto.a is on your system. So your make.inc should look something like this: ... OPTS = -O3 -DADD_ -DCUBLAS_GFORTRAN ... LIB = -lgoto -lpthread -lcublas -lcudart -llapack -lm CUDADIR = /usr/local/cuda-5.0 LIBDIR = -L/path-to-goto-blas -L$(C...
by Stan Tomov
Thu Feb 28, 2013 2:26 pm
Forum: User discussion
Topic: Deploying apps which use Magma
Replies: 3
Views: 1254

Re: Deploying apps which use Magma

Hi Matt, This is what we currently do. The user is given different sources, e.g., MAGMA, clMAGMA, or MAGMA MIC, and in addition in make.inc a user may specify which accelerator is available. Then only a particular version gets installed. This mechanisms is not convenient though, e.g., for tools like...
by Stan Tomov
Thu Feb 28, 2013 2:00 pm
Forum: User discussion
Topic: GPU and CPU both works?
Replies: 1
Views: 1058

Re: GPU and CPU both works?

Only the higher level (LAPACK) routines use both the CPUs and GPUs. The MAGMA BLAS is mostly for single GPU and some for multiple GPUs. These are used as building blocks in the LAPACK algorithms.
by Stan Tomov
Thu Feb 28, 2013 1:55 pm
Forum: User discussion
Topic: Variable stack allocations, Microsoft Visual Studio 2010
Replies: 4
Views: 2993

Re: Variable stack allocations, Microsoft Visual Studio 2010

Tom,
It will be in 1.4. We are incorporating some new eigensolvers for 1.4 and along that we will include bug fixes and other small changes (to be released within a month).
Stan
by Stan Tomov
Tue Feb 26, 2013 8:32 pm
Forum: User discussion
Topic: Functions implemented in magmablas interface (MAGMA 1.3.0)
Replies: 1
Views: 1384

Re: Functions implemented in magmablas interface (MAGMA 1.3.

This is correct. We had at some point implementation of all routines in the header but as CUBLAS improved they were not needed and removed. In general, we prefer not to maintain a complete BLAS implementation; only certain routines that are important for magma and we see how to accelerate (and they ...