05-08-2009
This simple sample.. have a memory leak.. why???
Why does reserved memory grow stillafter having liberated the threads?? .. should not it be able only like before having created them?
Begin program : VIRT:13560 RES:976
During trheads alive..: VIRT:510844 RES:1084
After Threads end: VIRT:120204 RES:1116
1116 ... Why?
#include <stdio.h>
#include <iostream>
#include <pthread.h>
static void* cliente(void *datos);
int main()
{
int ret;
pthread_t mythread[5];
printf("Pulsa una tecla para comenzar\r\n");
getchar();
while(ret<4)
{
int error=pthread_create((pthread_t *)&mythread[ret],NULL,cliente,NULL);
if(error==0)pthread_detach((pthread_t)mythread);
ret++;
}
printf("Fin.. pulsa una tecla\r\n");
getchar();
}
static void* cliente(void *datos)
{
char *buff=(char *)malloc(100000000);
sleep(15);
printf("Libero..\r\n");
free(buff);
buff=NULL;
pthread_exit(NULL);
}
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LEARN ABOUT DEBIAN
cla_lin_berr
cla_lin_berr.f(3) LAPACK cla_lin_berr.f(3)
NAME
cla_lin_berr.f -
SYNOPSIS
Functions/Subroutines
subroutine cla_lin_berr (N, NZ, NRHS, RES, AYB, BERR)
CLA_LIN_BERR
Function/Subroutine Documentation
subroutine cla_lin_berr (integerN, integerNZ, integerNRHS, complex, dimension( n, nrhs )RES, real, dimension( n, nrhs )AYB, real, dimension(
nrhs )BERR)
CLA_LIN_BERR
Purpose:
CLA_LIN_BERR computes componentwise relative backward error from
the formula
max(i) ( abs(R(i)) / ( abs(op(A_s))*abs(Y) + abs(B_s) )(i) )
where abs(Z) is the componentwise absolute value of the matrix
or vector Z.
Parameters:
N
N is INTEGER
The number of linear equations, i.e., the order of the
matrix A. N >= 0.
NZ
NZ is INTEGER
We add (NZ+1)*SLAMCH( 'Safe minimum' ) to R(i) in the numerator to
guard against spuriously zero residuals. Default value is N.
NRHS
NRHS is INTEGER
The number of right hand sides, i.e., the number of columns
of the matrices AYB, RES, and BERR. NRHS >= 0.
RES
RES is DOUBLE PRECISION array, dimension (N,NRHS)
The residual matrix, i.e., the matrix R in the relative backward
error formula above.
AYB
AYB is DOUBLE PRECISION array, dimension (N, NRHS)
The denominator in the relative backward error formula above, i.e.,
the matrix abs(op(A_s))*abs(Y) + abs(B_s). The matrices A, Y, and B
are from iterative refinement (see cla_gerfsx_extended.f).
BERR
BERR is COMPLEX array, dimension (NRHS)
The componentwise relative backward error from the formula above.
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
November 2011
Definition at line 102 of file cla_lin_berr.f.
Author
Generated automatically by Doxygen for LAPACK from the source code.
Version 3.4.1 Sun May 26 2013 cla_lin_berr.f(3)