7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 
  25 /*
  26  * @test
  27  * @key stress gc
  28  *
  29  * @summary converted from VM Testbase gc/gctests/MatrixJuggleGC.
  30  * VM Testbase keywords: [gc, stress, stressopt, nonconcurrent]
  31  * VM Testbase readme:
  32  * ********************************
  33  * set TIMEOUT = 20
  34  * *******************************
  35  * This test creates a 2 dimensional matrix of (100X100)10,000 elements.
  36  * Each element in this matrix houses the address of a "Cell" that
  37  * occupies about 100 bytes. The total memory occupied by this structure is
  38  * about 1M.
  39  * Once this structure, has been built, 5 threads are let loose that
  40  * randomly choose an element in this matrix and set its contents to null
  41  * effectively creating 100bytes of garbage. The threads continue to act
  42  * until all 5 threads combined have "nulled out" half the cells in the matrix.
  43  * At this point, 5 refiller threads proceed to refill the empty
  44  * matrix elements with new cells.
  45  * Once the refiller threads have refilled all the empty matrix elements
  46  * with new cells, the cycle begins all over again with the 5 "emptier"
  47  * threads "nulling out" cells randomly.

   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 
  25 /*
  26  * @test
  27  * @key stress gc randomness
  28  *
  29  * @summary converted from VM Testbase gc/gctests/MatrixJuggleGC.
  30  * VM Testbase keywords: [gc, stress, stressopt, nonconcurrent]
  31  * VM Testbase readme:
  32  * ********************************
  33  * set TIMEOUT = 20
  34  * *******************************
  35  * This test creates a 2 dimensional matrix of (100X100)10,000 elements.
  36  * Each element in this matrix houses the address of a "Cell" that
  37  * occupies about 100 bytes. The total memory occupied by this structure is
  38  * about 1M.
  39  * Once this structure, has been built, 5 threads are let loose that
  40  * randomly choose an element in this matrix and set its contents to null
  41  * effectively creating 100bytes of garbage. The threads continue to act
  42  * until all 5 threads combined have "nulled out" half the cells in the matrix.
  43  * At this point, 5 refiller threads proceed to refill the empty
  44  * matrix elements with new cells.
  45  * Once the refiller threads have refilled all the empty matrix elements
  46  * with new cells, the cycle begins all over again with the 5 "emptier"
  47  * threads "nulling out" cells randomly.