stan/jdk-24
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

8192983: gc/g1/TestVerifyGCType.java might fail on loaded machines

Browse Source 
Reviewed-by: tschatzl, jwilhelm
This commit is contained in:
Stefan Johansson 2017-12-05 13:58:55 +01:00
parent 5fb516acc0
commit 657b951fab
1 changed files with 34 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
test/hotspot/jtreg/gc/g1/TestVerifyGCType.java
View File

@ -142,8 +142,9 @@ public class TestVerifyGCType {
"-XX:+UnlockDiagnosticVMOptions",
"-XX:+UseG1GC",
"-XX:+WhiteBoxAPI",
"-XX:+ExplicitGCInvokesConcurrent",
"-Xlog:gc,gc+start,gc+verify=info",
"-Xms16m",
"-Xmx16m",
"-XX:+VerifyBeforeGC",
"-XX:+VerifyAfterGC",
"-XX:+VerifyDuringGC"});
@ -173,7 +174,7 @@ public class TestVerifyGCType {
private static void verifyCollection(String name, boolean expectBefore, boolean expectDuring, boolean expectAfter, String data) {
CollectionInfo ci = CollectionInfo.parseFirst(name, data);
Asserts.assertTrue(ci != null, "Expected GC not found: " + name);
Asserts.assertTrue(ci != null, "Expected GC not found: " + name + "\n" + data);
// Verify Before
verifyType(ci, expectBefore, VERIFY_BEFORE);
@ -243,14 +244,41 @@ public class TestVerifyGCType {
public static class TriggerGCs {
public static void main(String args[]) throws Exception {
WhiteBox wb = WhiteBox.getWhiteBox();
// Trigger the different GCs using the WhiteBox API and System.gc()
// to start a concurrent cycle with -XX:+ExplicitGCInvokesConcurrent.
// Allocate some memory that can be turned into garbage.
Object[] used = alloc1M();
// Trigger the different GCs using the WhiteBox API.
wb.fullGC(); // full
System.gc(); // initial-mark, remark and cleanup
// Memory have been promoted to old by full GC. Free
// some memory to be reclaimed by concurrent cycle.
partialFree(used);
wb.g1StartConcMarkCycle(); // initial-mark, remark and cleanup
// Sleep to make sure concurrent cycle is done
Thread.sleep(1000);
while (wb.g1InConcurrentMark()) {
Thread.sleep(1000);
}
// Trigger two young GCs, first will be young-only, second will be mixed.
wb.youngGC(); // young-only
wb.youngGC(); // mixed
}
private static Object[] alloc1M() {
Object[] ret = new Object[1024];
// Alloc 1024 1k byte arrays (~1M)
for (int i = 0; i < ret.length; i++) {
ret[i] = new byte[1024];
}
return ret;
}
private static void partialFree(Object[] array) {
// Free every other element
for (int i = 0; i < array.length; i+=2) {
array[i] = null;
}
}
}
}