Thanks for the bug report.  I've fixed the leak in our development branch and it should make its way to both the 1.6 and 1.7 release series.

Brian


On 1/21/13 6:53 AM, "Victor Vysotskiy" <victor.vysotskiy@teokem.lu.se> wrote:

Since my question unanswered for 4 days, I repeat the original post.


Dear Developers,

I am running into memory problems when creating/allocating MPI's window and its memory frequently. Below is listed a sample code reproducing the problem:

#include <stdio.h>
#include <mpi.h>
#define NEL    8
#define NTIMES 1000000

int main (int argc,char *argv[]) {
  int       i;
  double    w[NEL];
  MPI_Aint  win_size,warr_size;
  MPI_Win  *win;

  win_size=sizeof(MPI_Win);
  warr_size=sizeof(MPI_DOUBLE)*NEL;
 
     
  MPI_Init (&argc, &argv);
 
  for(i=0;i<NTIMES;i++) {
      MPI_Alloc_mem(win_size,MPI_INFO_NULL,&win);

      MPI_Win_create(w,warr_size,sizeof(double),MPI_INFO_NULL,MPI_COMM_WORLD,win);
      MPI_Win_free(win);

      MPI_Free_mem(win);
  }

  MPI_Finalize();

  return 0;

}

During of the execution of this program it is eating more and more memory, regardless of Linux distribution and
gcc version used. Indeed, I have already reproduced the problem on 32-bit Ubuntu 12.04.1 && gcc-4.6.3, and 64-bit Cent OS 5.8 && gcc 4.6.2. For instance,  below is listed the corresponding Valgrind's (massif) results on the runtime memory usage:

Command:            ./mleak.win
ms_print arguments: massif.out.15028
  n       time(ms)         total(B)   useful-heap(B) )
  1         10,960        4,290,024        3,986,911
  2         26,979        5,248,248        4,562,911
  3         42,586        6,174,440        5,118,311
  4         54,892        6,904,736        5,556,391
  5         69,562        7,771,088        6,074,535
  6         79,334        8,351,144        6,422,575
  7         90,920        9,038,208        6,834,799
  8        103,449        9,787,760        7,286,215
  9        115,984       10,534,056        7,734,511
 10        130,692       11,407,016        8,258,287
 11        146,637       12,352,376        8,825,503
 12        155,095       12,854,016        9,126,487
 13        163,884       13,376,016        9,439,687
 14        173,036       13,919,256        9,765,631
 15        182,559       14,484,488       10,104,751
 16        192,465       15,072,688       10,457,671
 17        202,770       15,684,768       10,824,919
 18        213,499       16,321,768       11,207,119
 19        224,658       16,984,608       11,604,823
 20        236,275       17,674,320       12,018,631
 21        248,366       18,392,040       12,449,263
 22        260,954       19,138,960       12,897,415
 23        274,111       19,916,152       13,363,711
 24        287,781       20,724,912       13,848,967
 25        302,012       21,566,552       14,353,951
 26        316,817       22,442,344       14,879,407
 27        332,189       23,353,664       15,426,199
 28        348,179       24,301,984       15,995,191
 29        364,829       25,288,816       16,587,271
 30        373,404       25,797,176       16,892,287
 31        382,159       26,315,736       17,203,423
 32        391,086       26,844,696       17,520,799
 33        400,196       27,384,336       17,844,583
 34        409,491       27,934,808       18,174,847
 35        418,958       28,496,328       18,511,759
 36        428,621       29,069,168       18,855,463
 37        438,478       29,653,488       19,206,055
 38        448,539       30,249,560       19,563,679
 39        458,806       30,857,640       19,928,527
 40        469,271       31,477,920       20,300,695
 41        479,955       32,110,680       20,680,351
 42        490,849       32,756,120       21,067,615
 43        501,960       33,414,552       21,462,655
 44        513,294       34,086,232       21,865,663
 45        524,859       34,771,392       22,276,759
 46        536,729       35,470,304       22,696,087
 47        548,772       36,183,304       23,123,887
 48        561,047       36,910,624       23,560,279
 49        573,561       37,652,544       24,005,431
 50        579,928       38,029,080       24,231,343
 51        586,337       38,409,376       24,459,511
 52        592,820       38,793,496       24,689,983
 53        599,367       39,181,456       24,922,759
 54        605,983       39,573,296       25,157,863
 55        612,664       39,969,056       25,395,319
 56        619,412       40,368,776       25,635,151
 57        626,225       40,772,488       25,877,359
 58        633,113       41,180,248       26,122,015
 59        640,071       41,592,088       26,369,119
 60        647,095       42,008,048       26,618,695
 61        654,192       42,428,168       26,870,767
 62        661,358       42,852,488       27,125,359
 63        668,594       43,281,040       27,382,471
 64        675,905       43,713,880       27,642,175


On the other hand, the MPICH2 and  MVAPICH2 binaries are always used a constant amount of memory during the execution of this test.

Could you please comment on the problem?

Enclosed please find the source code, and the corresponding valgrind's output generated via  the ''--tool=massif --time-unit=ms" option.

Regards,
Victor.


--
  Brian W. Barrett
  Scalable System Software Group
  Sandia National Laboratories