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 * @test TestSmallHeap
26 * @bug 8067438
27 * @requires vm.gc=="null"
28 * @requires (vm.opt.AggressiveOpts=="null") | (vm.opt.AggressiveOpts=="false")
29 * @requires vm.compMode != "Xcomp"
30 * @requires vm.opt.UseCompressedOops != false
31 * @summary Verify that starting the VM with a small heap works
32 * @library /testlibrary /../../test/lib
33 * @modules java.management/sun.management
34 * @build TestSmallHeap
35 * @run main ClassFileInstaller sun.hotspot.WhiteBox
36 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xmx2m -XX:+UseParallelGC TestSmallHeap
37 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xmx2m -XX:+UseSerialGC TestSmallHeap
38 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xmx2m -XX:+UseG1GC TestSmallHeap
39 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xmx2m -XX:+UseConcMarkSweepGC TestSmallHeap
40 */
41
42 /* Note: It would be nice to verify the minimal supported heap size (2m) here,
43 * but we align the heap size based on the card table size. And the card table
44 * size is aligned based on the minimal pages size provided by the os. This
45 * means that on most platforms, where the minimal page size is 4k, we get a
46 * minimal heap size of 2m but on Solaris/Sparc we have a page size of 8k and
47 * get a minimal heap size of 4m. And on platforms where the page size is 64k
48 * we get a minimal heap size of 32m. We never use large pages for the card table.
49 *
50 * There is also no check in the VM for verifying that the maximum heap size
51 * is larger than the supported minimal heap size. This means that specifying
52 * -Xmx1m on the command line is fine but will give a heap of 2m (or 4m or 32m).
|
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 * @test TestSmallHeap
26 * @bug 8067438
27 * @requires vm.gc=="null"
28 * @requires (vm.opt.AggressiveOpts=="null") | (vm.opt.AggressiveOpts=="false")
29 * @requires vm.compMode != "Xcomp"
30 * @requires vm.opt.UseCompressedOops != false
31 * @summary Verify that starting the VM with a small heap works
32 * @library /testlibrary /test/lib
33 * @modules java.management/sun.management
34 * @build TestSmallHeap
35 * @run main ClassFileInstaller sun.hotspot.WhiteBox
36 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xmx2m -XX:+UseParallelGC TestSmallHeap
37 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xmx2m -XX:+UseSerialGC TestSmallHeap
38 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xmx2m -XX:+UseG1GC TestSmallHeap
39 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xmx2m -XX:+UseConcMarkSweepGC TestSmallHeap
40 */
41
42 /* Note: It would be nice to verify the minimal supported heap size (2m) here,
43 * but we align the heap size based on the card table size. And the card table
44 * size is aligned based on the minimal pages size provided by the os. This
45 * means that on most platforms, where the minimal page size is 4k, we get a
46 * minimal heap size of 2m but on Solaris/Sparc we have a page size of 8k and
47 * get a minimal heap size of 4m. And on platforms where the page size is 64k
48 * we get a minimal heap size of 32m. We never use large pages for the card table.
49 *
50 * There is also no check in the VM for verifying that the maximum heap size
51 * is larger than the supported minimal heap size. This means that specifying
52 * -Xmx1m on the command line is fine but will give a heap of 2m (or 4m or 32m).
|