* glibc detected * ./test.out: free(): invalid next size (fast)

hemantp_p_ — Mon, 28 Apr 2014 10:38:47 GMT

Sir,

i am trying to multiply 2 block sparse matrices ie. block elemnts along the diagnol. in my case two 4*4 blocks.

a_mat is the nonzero array for A. since A is 8*8 a_mat(columns array as per documentation) is 8*4 due to block diagnol sparsenes.

the result is atored in either q_mat or b_mat.

i have tried bot routines mkl_scsrmultd(a_mat * a_mat) & scsrmm(a_mat *b_mat)

also i have seen to that scscrmult gets one based indexing and scsrmm get zero based. I just cant seem to figure out the error as to which size is wrong .

Please help

Hello,

Ying_H_Intel — Wed, 30 Apr 2014 07:32:15 GMT

Hello,

It seems your code have some memory issues. If you have Intel Inspector XE, you will find the problem in quick way :).

The main problem are in the *.h file. They should be : malloc(M*N*sizeof(int))

int * gen_col(int M, int N)
{
   int n = 0;
int m = 0;
int k = 1;
int i;
   int *x = (int*)malloc(M*N*sizeof(int));

void * gen_row(int M, int N)
{
   int i;
   int *x = (int*)malloc((M+1)*sizeof(int));

and other memory leak as you only malloc them, but haven't free them.

Best Regards,

Ying

Inspector result :)

ID Type Sources Modules Object Size State

P1       Unhandled application exception   read.c   MSVCR100D.dll       New
P2       Memory leak   gen_col.h   mkl-lab1-dgemm.exe   32   New
P3       Memory leak   test1.cpp   mkl-lab1-dgemm.exe   128   New
P4       Memory leak   test1.cpp   mkl-lab1-dgemm.exe   256   New
P5       Memory leak   test1.cpp   mkl-lab1-dgemm.exe   256   New
P6       Invalid memory access   gen_col.h   mkl-lab1-dgemm.exe       New
P7       Invalid memory access   test1.cpp   mkl-lab1-dgemm.exe       New

topic *** glibc detected *** ./test.out: free(): invalid next size (fast) in Intel® oneAPI Math Kernel Library

*** glibc detected *** ./test.out: free(): invalid next size (fast)

Hello,

topic * glibc detected * ./test.out: free(): invalid next size (fast) in Intel® oneAPI Math Kernel Library

* glibc detected * ./test.out: free(): invalid next size (fast)