Questions tagged [cblas]
59 questions
0
votes
1 answer
Simple cblas gemm code but strange result
The following is the c code
const int M = 4;
const int N = 1;
const int K = 2;
const int LDA = M;
const int LDB = K;
const int LDC = M;
float input_data[2]{1, 1};
float weight_data[8]{1.1, 2.01, 3.001, 4.0001, 5.1, 6.01, 7.001, 8.0001};
float…
daquexian
- 169
- 3
- 17
0
votes
0 answers
Using Eigen LIbrary with CBLAS
I know that I can ask Eigen to use a Blas library by defining the variable "EIGEN_USE_BLAS". I have a very efficient CBLAS implementation available on my system. Is it possible to make Eigen to use that CBLAS library?
Soo
- 885
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- 26
0
votes
1 answer
CBLAS installation issue: undefined reference to `_gfortran_store_exe_path'
I downloaded CBLAS (cblas.tgz) from http://www.netlib.org/blas/ and tried to install CBLAS and has the following error:
[kokep@n007 CBLAS]$ CC=gcc-8.1 LDFLAGS="-L/home/kokep/bin/lib" CFLAGS="-I/home/kokep/bin/include" make
( cd src && make…
bison72
- 324
- 3
- 15
0
votes
2 answers
Why does using `cblas_ccopy` cause intermittent memory errors?
The code below simply tries to copy values from one pointer to another, using cblas_ccopy, but it results in an malloc: *** error ... incorrect checksum for freed object error about one third of the time. Why doesn't it always work?
import…
ASDFQWERTY
- 399
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- 8
0
votes
1 answer
File format not recognized error while installing CBLAS on a Ubuntu machine
I need to install CBLAS on an Ubuntu 16.04.4 machine. The following values have been set in the Makefile.in file of CBLAS:
SHELL = /bin/sh
PLAT = LINUX
BLLIB = /home/ubuntu/BLAS-3.8.0/blas_LINUX.a
CBLIB = /home/ubuntu/CBLAS/lib/cblas_LINUX.a
CC =…
Vasanti
- 1,207
- 2
- 12
- 24
0
votes
2 answers
BLAS Functions Dgemm but all matrices are multiplied by a Scalar
Is there any Dgemm like matrix call that scales the a and b matrix?
(A, B, C are scalars).
IE
c = C * c + (A*op(a)) * (B*op(b));
Bonus points is therer any reason this isn't supported or is it just uncommon in Linear-Algebra and therefor…
Joseph Franciscus
- 372
- 2
- 12
0
votes
0 answers
cython magic cannot find include file when it is in the same directory
I am getting this error upon running the following code block in ipython:
%%cython
cdef extern from "cblas.h":
enum CBLAS_ORDER:
CblasRowMajor=101
CblasColMajor=102
enum CBLAS_TRANSPOSE:
CblasNoTrans=111
…
ffffffyyyy
- 117
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- 7
0
votes
0 answers
cython failed with exit status 2 when trying to access library
cdef extern from "cblas.h":
enum CBLAS_ORDER:
CblasRowMajor=101
CblasColMajor=102
enum CBLAS_TRANSPOSE:
CblasNoTrans=111
CblasTrans=112
CblasConjTrans=113
AtlasConj=114
This code returns the error
CompileError: Command…
ffffffyyyy
- 117
- 2
- 7
0
votes
1 answer
CBLAS mac OS X Undefined symbols for architecture x86_64 error
I'm trying different C linear algebra libraries for my projects and now I want to learn BLAS (CBLAS). I am trying to follow the tutorial here. I realised that cblas is already built in the xcode and by adding the flag
gcc foo.c -framework…
Foad S. Farimani
- 12,396
- 15
- 78
- 193
0
votes
1 answer
openblas sgemv CblasRowMajor implementation returns wrong results (cblas_sgemv)
I did some test using cblas_sgemv in openblas and found that it returned a wrong result in my test case.
A is
1 2
3 4
5 6
B is
1 2
The output C should be 5 11 17
But, it outputs 5 14 0
Here is the sample…
sushiman
- 13
- 1
- 4
0
votes
2 answers
How to compute the sum of the values of elements in a vector using cblas functions?
I need to sum all the elements of a matrix in caffe,
But as I noticed, the caffe wrapper of the cblas functions ('math_functions.hpp' & 'math_functions.cpp') is using cblas_sasum function as caffe_cpu_asum that computes the sum of the absolute…
Ali Sharifi B.
- 595
- 1
- 6
- 15
0
votes
1 answer
Cblas_sgemm produces wrong results
I have a problem using the sgemm function of cblas.
Here is the code:
#include
#include
#include
#include
#include
#define MATRIX_DIM 5
int main(){
float *a_mat =…
kmentis
- 23
- 5
0
votes
1 answer
Using cuBLAS in OpenAcc
I want to replace the call to "cblas_dgemm()" with cublasDgemm(). Here is the original wrapper from Shark machine learning library:
inline void gemm(
CBLAS_ORDER const Order, CBLAS_TRANSPOSE TransA, CBLAS_TRANSPOSE TransB,
int M, int N,…
Ali Jooya
- 75
- 7
-1
votes
1 answer
NVBLAS through CBLAS
I have a C++ code and I used CBLAS to compute dgemm and dtrsm. I am interested to use GPUs for performance.
With the tests I have done I could use NVBLAS using nvblas.h, however it is not close to CBLAS. I think I can change my code to call dgemm…
Aznaveh
- 558
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