Get the start time of the criu restore process

jcl/src/java.base/share/classes/openj9/internal/criu/InternalCRIUSupport.java

@@ -69,6 +69,7 @@ public final class InternalCRIUSupport {
 	private static native boolean enableCRIUSecProviderImpl();
 	private static native long getCheckpointRestoreNanoTimeDeltaImpl();
 	private static native long getLastRestoreTimeImpl();
+	private static native long getProcessRestoreStartTimeImpl();
 	private static native boolean isCRIUSupportEnabledImpl();
 	private static native boolean isCheckpointAllowedImpl();
 /*[IF CRAC_SUPPORT]*/
@@ -95,13 +96,24 @@ public static long getCheckpointRestoreNanoTimeDelta() {
 	 * Retrieve the time when the last restore occurred. In the case of multiple
 	 * restores the previous times are overwritten.
 	 *
-	 * @return the time in milliseconds since the start of the epoch, -1 if restore
+	 * @return the time in nanoseconds since the start of the epoch, -1 if restore
 	 *         has not occurred.
 	 */
 	public static long getLastRestoreTime() {
 		return getLastRestoreTimeImpl();
 	}
 
+	/**
+	 * Get the start time of the CRIU process that restores the java process.
+	 * The time that is set by the restored java process when it resumes from
+	 * checkpoint can be retrieved with {@link #getLastRestoreTime()}.
+	 *
+	 * @return the time in nanoseconds since the epoch, -1 if restore has not occurred.
+	 */
+	public static long getProcessRestoreStartTime() {
+		return getProcessRestoreStartTimeImpl();
+	}
+
 	/**
 	 * Queries if CRaC or CRIU support is enabled.
 	 *

runtime/jcl/common/criu.cpp

@@ -43,7 +43,15 @@ Java_openj9_internal_criu_InternalCRIUSupport_getLastRestoreTimeImpl(JNIEnv *env
 {
 	J9VMThread *currentThread = (J9VMThread *)env;
 
-	return currentThread->javaVM->checkpointState.lastRestoreTimeMillis;
+	return currentThread->javaVM->checkpointState.lastRestoreTimeInNanoseconds;
+}
+
+jlong JNICALL
+Java_openj9_internal_criu_InternalCRIUSupport_getProcessRestoreStartTimeImpl(JNIEnv *env, jclass unused)
+{
+	J9VMThread *currentThread = (J9VMThread *)env;
+
+	return currentThread->javaVM->checkpointState.processRestoreStartTimeInNanoseconds;
 }
 
 jboolean JNICALL

runtime/jcl/exports.cmake

@@ -675,6 +675,7 @@ if(J9VM_OPT_CRIU_SUPPORT)
 		Java_openj9_internal_criu_InternalCRIUSupport_enableCRIUSecProviderImpl
 		Java_openj9_internal_criu_InternalCRIUSupport_getCheckpointRestoreNanoTimeDeltaImpl
 		Java_openj9_internal_criu_InternalCRIUSupport_getLastRestoreTimeImpl
+		Java_openj9_internal_criu_InternalCRIUSupport_getProcessRestoreStartTimeImpl
 		Java_openj9_internal_criu_InternalCRIUSupport_getRestoreSystemProperites
 		Java_openj9_internal_criu_InternalCRIUSupport_isCheckpointAllowedImpl
 		Java_openj9_internal_criu_InternalCRIUSupport_isCRIUSupportEnabledImpl

runtime/jcl/uma/criu_exports.xml

@@ -23,6 +23,7 @@ SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0-only WITH Classpath-ex
 	<export name="Java_openj9_internal_criu_InternalCRIUSupport_enableCRIUSecProviderImpl" />
 	<export name="Java_openj9_internal_criu_InternalCRIUSupport_getCheckpointRestoreNanoTimeDeltaImpl" />
 	<export name="Java_openj9_internal_criu_InternalCRIUSupport_getLastRestoreTimeImpl" />
+	<export name="Java_openj9_internal_criu_InternalCRIUSupport_getProcessRestoreStartTimeImpl" />
 	<export name="Java_openj9_internal_criu_InternalCRIUSupport_isCheckpointAllowedImpl" />
 	<export name="Java_openj9_internal_criu_InternalCRIUSupport_isCRIUSupportEnabledImpl" />
 </exports>

runtime/nls/j9vm/j9vm.nls

@@ -2313,3 +2313,10 @@ J9NLS_VM_CRIU_CRAC_INCOMPATIBLE_SETTING.explanation=-XX:+EnableCRIUSupport and -
 J9NLS_VM_CRIU_CRAC_INCOMPATIBLE_SETTING.system_action=The JVM will fail to start.
 J9NLS_VM_CRIU_CRAC_INCOMPATIBLE_SETTING.user_response=Remove one of the options from the command line.
 # END NON-TRANSLATABLE
+
+J9NLS_VM_CRIU_J9_GET_PROCESS_START_TIME_FAILURE=j9sysinfo_get_process_start_time failed with errno=%zi
+# START NON-TRANSLATABLE
+J9NLS_VM_CRIU_J9_GET_PROCESS_START_TIME_FAILURE.explanation=j9sysinfo_get_process_start_time failed.
+J9NLS_VM_CRIU_J9_GET_PROCESS_START_TIME_FAILURE.system_action=The JVM will throw a JVMRestoreException.
+J9NLS_VM_CRIU_J9_GET_PROCESS_START_TIME_FAILURE.user_response=View CRIU documentation to determine how to resolve the error.
+# END NON-TRANSLATABLE

runtime/oti/j9nonbuilder.h

@@ -4228,7 +4228,8 @@ typedef struct J9CRIUCheckpointState {
 	 * Only supports one Checkpoint, could be restored multiple times.
 	 */
 	I_64 checkpointRestoreTimeDelta;
-	I_64 lastRestoreTimeMillis;
+	I_64 lastRestoreTimeInNanoseconds;
+	I_64 processRestoreStartTimeInNanoseconds;
 	UDATA maxRetryForNotCheckpointSafe;
 	UDATA sleepMillisecondsForNotCheckpointSafe;
 	jclass criuJVMCheckpointExceptionClass;

runtime/oti/j9port_generated.h

@@ -761,6 +761,9 @@ extern J9_CFUNC int32_t j9port_isCompatible(struct J9PortLibraryVersion *expecte
 #define j9sysinfo_get_open_file_count(param1) OMRPORT_FROM_J9PORT(privatePortLibrary)->sysinfo_get_open_file_count(OMRPORT_FROM_J9PORT(privatePortLibrary),param1)
 #define j9sysinfo_get_os_description(param1) OMRPORT_FROM_J9PORT(privatePortLibrary)->sysinfo_get_os_description(OMRPORT_FROM_J9PORT(privatePortLibrary),param1)
 #define j9sysinfo_os_has_feature(param1,param2) OMRPORT_FROM_J9PORT(privatePortLibrary)->sysinfo_os_has_feature(OMRPORT_FROM_J9PORT(privatePortLibrary),param1,param2)
+#if defined(J9VM_OPT_CRIU_SUPPORT)
+#define j9sysinfo_get_process_start_time(param1,param2) OMRPORT_FROM_J9PORT(privatePortLibrary)->sysinfo_get_process_start_time(OMRPORT_FROM_J9PORT(privatePortLibrary),param1,param2)
+#endif /* defined(J9VM_OPT_CRIU_SUPPORT) */
 #define j9syslog_write(param1,param2) OMRPORT_FROM_J9PORT(privatePortLibrary)->syslog_write(OMRPORT_FROM_J9PORT(privatePortLibrary),param1,param2)
 #define j9hypervisor_startup() privatePortLibrary->hypervisor_startup(privatePortLibrary)
 #define j9hypervisor_shutdown() privatePortLibrary->hypervisor_shutdown(privatePortLibrary)

runtime/oti/jclprots.h

@@ -1303,6 +1303,9 @@ Java_openj9_internal_criu_InternalCRIUSupport_getCheckpointRestoreNanoTimeDeltaI
 jlong JNICALL
 Java_openj9_internal_criu_InternalCRIUSupport_getLastRestoreTimeImpl(JNIEnv *env, jclass unused);
 
+jlong JNICALL
+Java_openj9_internal_criu_InternalCRIUSupport_getProcessRestoreStartTimeImpl(JNIEnv *env, jclass unused);
+
 jboolean JNICALL
 Java_openj9_internal_criu_InternalCRIUSupport_isCheckpointAllowedImpl(JNIEnv *env, jclass unused);
 

runtime/tests/port/si.c

@@ -2280,6 +2280,27 @@ j9sysinfo_test_get_l1dcache_line_size(struct J9PortLibrary *portLibrary)
 	return reportTestExit(portLibrary, testName);
 }
 
+#if defined(J9VM_OPT_CRIU_SUPPORT)
+I_32
+j9sysinfo_test_get_process_start_time(struct J9PortLibrary *portLibrary)
+{
+	PORT_ACCESS_FROM_PORT(portLibrary);
+	const char *testName = "j9sysinfo_test_get_process_start_time";
+	UDATA pid = j9sysinfo_get_pid();
+	U_64 processStartTimeInNanoseconds = 0;
+	I_32 rc = j9sysinfo_get_process_start_time(pid, &processStartTimeInNanoseconds);
+	if ((0 != rc) || (0 == processStartTimeInNanoseconds)) {
+		outputErrorMessage(
+			PORTTEST_ERROR_ARGS,
+			"j9sysinfo_get_process_start_time, pid=%zu, processStartTimeInNanoseconds=%llu, rc=%d.\n",
+			pid,
+			processStartTimeInNanoseconds,
+			rc);
+	}
+	return reportTestExit(portLibrary, testName);
+}
+#endif /* defined(J9VM_OPT_CRIU_SUPPORT) */
+
 /*
  * pass in the port library to do sysinfo tests
  */
@@ -2350,6 +2371,9 @@ j9sysinfo_runTests(struct J9PortLibrary *portLibrary, char *argv0)
 	/* Not supported on Z & OSX (and Windows, of course).  Enable, when available. */
 	rc |= j9sysinfo_test_get_open_file_count(portLibrary);
 #endif /* defined(LINUX) || defined(AIXPPC) */
+#if defined(J9VM_OPT_CRIU_SUPPORT)
+	rc |= j9sysinfo_test_get_process_start_time(portLibrary);
+#endif /* defined(J9VM_OPT_CRIU_SUPPORT) */
 
 	/* Output results */
 	j9tty_printf(PORTLIB, "\nSysinfo test done%s\n\n", rc == TEST_PASS ? "." : ", failures detected.");

runtime/vm/CRIUHelpers.cpp

@@ -60,7 +60,6 @@ static BOOLEAN criuRestoreDisableSharedClassCache(J9VMThread *currentThread, voi
 static BOOLEAN criuRestoreInitializeDump(J9VMThread *currentThread, void *userData, const char **nlsMsgFormat);
 static jvmtiIterationControl objectIteratorCallback(J9JavaVM *vm, J9MM_IterateObjectDescriptor *objectDesc, void *userData);
 
-#define J9TIME_NANOSECONDS_PER_MILLIS 1000000
 #define STRING_BUFFER_SIZE 256
 #define ENV_FILE_BUFFER 1024
 
@@ -1510,6 +1509,7 @@ criuCheckpointJVMImpl(JNIEnv *env,
 		I_32 syslogBufferSize = 0;
 		UDATA oldVMState = VM_VMHelpers::setVMState(currentThread, J9VMSTATE_CRIU_SUPPORT_CHECKPOINT_PHASE_START);
 		UDATA notSafeToCheckpoint = 0;
+		UDATA criuRestorePid = 0;
 
 		vmFuncs->internalEnterVMFromJNI(currentThread);
 
@@ -1756,8 +1756,31 @@ criuCheckpointJVMImpl(JNIEnv *env,
 		VM_VMHelpers::setVMState(currentThread, J9VMSTATE_CRIU_SUPPORT_RESTORE_PHASE_START);
 		restoreNanoTimeMonotonic = j9time_nano_time();
 		restoreNanoUTCTime = j9time_current_time_nanos(&success);
-		vm->checkpointState.lastRestoreTimeMillis = (I_64)(restoreNanoUTCTime / J9TIME_NANOSECONDS_PER_MILLIS);
-		Trc_VM_criu_after_dump(currentThread, restoreNanoTimeMonotonic, restoreNanoUTCTime, vm->checkpointState.lastRestoreTimeMillis);
+		if (0 == success) {
+			systemReturnCode = errno;
+			currentExceptionClass = vm->checkpointState.criuSystemRestoreExceptionClass;
+			nlsMsgFormat = j9nls_lookup_message(
+				J9NLS_DO_NOT_PRINT_MESSAGE_TAG | J9NLS_DO_NOT_APPEND_NEWLINE,
+				J9NLS_VM_CRIU_J9_CURRENT_TIME_NANOS_FAILURE,
+				NULL);
+			j9mem_free_memory(syslogOptions);
+			goto wakeJavaThreadsWithExclusiveVMAccess;
+		}
+		vm->checkpointState.lastRestoreTimeInNanoseconds = (I_64)restoreNanoUTCTime;
+		Trc_VM_criu_after_dump(currentThread, restoreNanoTimeMonotonic, vm->checkpointState.lastRestoreTimeInNanoseconds);
+		criuRestorePid = j9sysinfo_get_ppid();
+		systemReturnCode = j9sysinfo_get_process_start_time(criuRestorePid, &restoreNanoUTCTime);
+		if (0 != systemReturnCode) {
+			currentExceptionClass = vm->checkpointState.criuSystemRestoreExceptionClass;
+			nlsMsgFormat = j9nls_lookup_message(
+				J9NLS_DO_NOT_PRINT_MESSAGE_TAG | J9NLS_DO_NOT_APPEND_NEWLINE,
+				J9NLS_VM_CRIU_J9_GET_PROCESS_START_TIME_FAILURE,
+				NULL);
+			j9mem_free_memory(syslogOptions);
+			goto wakeJavaThreadsWithExclusiveVMAccess;
+		}
+		vm->checkpointState.processRestoreStartTimeInNanoseconds = (I_64)restoreNanoUTCTime;
+		Trc_VM_criu_process_restore_start_after_dump(currentThread, criuRestorePid, vm->checkpointState.processRestoreStartTimeInNanoseconds);
 		if (!syslogFlagNone) {
 			/* Re-open the system logger, and set options with saved string value. */
 			j9port_control(J9PORT_CTLDATA_SYSLOG_OPEN, 0);

runtime/vm/j9vm.tdf

@@ -960,5 +960,7 @@ TraceException=Trc_VM_criu_setupJNIFieldIDsAndCRIUAPI_null_exception_class Overh
 TraceException=Trc_VM_criu_setupJNIFieldIDsAndCRIUAPI_null_init Overhead=1 Level=1 Template="setupJNIFieldIDsAndCRIUAPI() criuSystemRestoreExceptionInit(%p) criuJVMRestoreExceptionInit(%p) criuSystemCheckpointExceptionInit(%p) criuJVMCheckpointExceptionInit(%p)"
 
 TraceExit=Trc_VM_criu_checkpointJVMImpl_Exit Overhead=1 Level=2 Template="Java_openj9_internal_criu_CRIUSupport_checkpointJVMImpl"
-TraceEvent=Trc_VM_criu_after_dump Overhead=1 Level=2 Template="After checkpoint criu_dump(), criuRestoreNanoTimeMonotonic (%lld), criuRestoreNanoUTCTime (%llu), lastRestoreTimeMillis (%lld)"
+TraceEvent=Trc_VM_criu_after_dump Obsolete Overhead=1 Level=2 Template="After checkpoint criu_dump(), criuRestoreNanoTimeMonotonic (%lld), criuRestoreNanoUTCTime (%llu), lastRestoreTimeMillis (%lld)"
 TraceEvent=Trc_VM_crac_checkpointTo NoEnv Overhead=1 Level=3 Template="-XX:CRaCCheckpointTo=%s"
+TraceEvent=Trc_VM_criu_after_dump Overhead=1 Level=2 Template="After checkpoint criu_dump(), restoreNanoTimeMonotonic (%lld), lastRestoreTimeInNanoseconds (%lld)"
+TraceEvent=Trc_VM_criu_process_restore_start_after_dump Overhead=1 Level=2 Template="After checkpoint criu_dump(), restorePid (%zu), processRestoreStartTimeInNanoseconds (%lld)"

runtime/vm/jvminit.c

@@ -3978,7 +3978,8 @@ processVMArgsFromFirstToLast(J9JavaVM * vm)
 		}
 	}
 
-	vm->checkpointState.lastRestoreTimeMillis = -1;
+	vm->checkpointState.lastRestoreTimeInNanoseconds = -1;
+	vm->checkpointState.processRestoreStartTimeInNanoseconds = -1;
 #endif /* defined(J9VM_OPT_CRIU_SUPPORT) */
 
 	{

test/functional/TestUtilities/src/org/openj9/test/util/TimeUtilities.java

@@ -21,10 +21,12 @@
  *******************************************************************************/
 package org.openj9.test.util;
 
+import java.time.Instant;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.Timer;
 import java.util.TimerTask;
+import java.util.concurrent.TimeUnit;
 
 /**
  * Utility class to check time.
@@ -91,6 +93,11 @@ public static boolean checkElapseTime(String testName, long startMillisTime, lon
 		return checkElapseTime(testName, startMillisTime, startNanoTime, minElapsedMillisTime, 0, minElapsedNanoTimeInMillis, 0);
 	}
 
+	public static long getCurrentTimeInNanoseconds() {
+		Instant instant = Instant.now();
+		return TimeUnit.SECONDS.toNanos(instant.getEpochSecond()) + instant.getNano();
+	}
+
 	private volatile boolean tasksPassed = true;
 	private volatile int taskRunning = 0;
 	private volatile int taskStarted = 0;

test/functional/cmdLineTests/criu/criu_nonPortable.xml

@@ -190,7 +190,7 @@
   </test>
 
   <test id="Create CRIU checkpoint image and restore once - testGetLastRestoreTime">
-    <command>bash $SCRIPPATH$ $TEST_RESROOT$ $JAVA_COMMAND$ "$JVM_OPTIONS$ -Xtrace:print={j9vm.684-696,j9vm.699,j9vm.717-743} --add-exports java.base/openj9.internal.criu=ALL-UNNAMED" $MAINCLASS_TIMECHANGE$ testGetLastRestoreTime 1 false false</command>
+    <command>bash $SCRIPPATH$ $TEST_RESROOT$ $JAVA_COMMAND$ "$JVM_OPTIONS$ -Xtrace:print={j9vm.684-696,j9vm.699,j9vm.717-743,j9vm.746-747} --add-exports java.base/openj9.internal.criu=ALL-UNNAMED" $MAINCLASS_TIMECHANGE$ testGetLastRestoreTime 1 false false</command>
     <output type="success" caseSensitive="no" regex="no">Killed</output>
     <output type="success" caseSensitive="yes" regex="no">PASSED: InternalCRIUSupport.getLastRestoreTime()</output>
     <output type="failure" caseSensitive="yes" regex="no">CRIU is not enabled</output>
@@ -205,6 +205,22 @@
     <output type="failure" caseSensitive="yes" regex="no">User requested Java dump using</output>
   </test>
 
+  <test id="Create CRIU checkpoint image and restore once - testGetProcessRestoreStartTime">
+    <command>bash $SCRIPPATH$ $TEST_RESROOT$ $JAVA_COMMAND$ "$JVM_OPTIONS$ -Xtrace:print={j9vm.684-696,j9vm.699,j9vm.717-743,j9vm.746-747} --add-exports java.base/openj9.internal.criu=ALL-UNNAMED" $MAINCLASS_TIMECHANGE$ testGetProcessRestoreStartTime 1 false false</command>
+    <output type="success" caseSensitive="no" regex="no">Killed</output>
+    <output type="success" caseSensitive="yes" regex="no">PASSED: InternalCRIUSupport.getProcessRestoreStartTime()</output>
+    <output type="failure" caseSensitive="yes" regex="no">CRIU is not enabled</output>
+    <output type="failure" caseSensitive="yes" regex="no">Operation not permitted</output>
+    <output type="failure" caseSensitive="yes" regex="no">FAILED: InternalCRIUSupport.getProcessRestoreStartTime()</output>
+    <!-- If CRIU can't acquire the original thread IDs, this test will fail. Nothing can be done about this failure. -->
+    <output type="success" caseSensitive="yes" regex="no">Thread pid mismatch</output>
+    <output type="success" caseSensitive="yes" regex="no">do not match expected</output>
+    <output type="success" caseSensitive="yes" regex="no">Unable to create a thread:</output>
+    <!-- In the past, the failure below was caused by an issue where CRIU can't be found on the PATH. -->
+    <output type="failure" caseSensitive="yes" regex="no">Could not dump the JVM processes, err=-70</output>
+    <output type="failure" caseSensitive="yes" regex="no">User requested Java dump using</output>
+  </test>
+
   <test id="Create CRIU checkpoint image and restore once - testMXBeanUpTime">
     <command>bash $SCRIPPATH$ $TEST_RESROOT$ $JAVA_COMMAND$ "$JVM_OPTIONS$ -Xtrace:print={j9jcl.533,j9vm.684-696,j9vm.699,j9vm.717-743} --add-exports java.base/openj9.internal.criu=ALL-UNNAMED" -Xdump:java+system+jit:events=throw+systhrow,filter=org/eclipse/openj9/criu/JVMCheckpointException $MAINCLASS_TIMECHANGE$ testMXBeanUpTime 1 false false</command>
     <output type="success" caseSensitive="no" regex="no">Killed</output>

test/functional/cmdLineTests/criu/src/org/openj9/criu/TimeChangeTest.java

@@ -59,6 +59,9 @@ public static void main(String args[]) throws InterruptedException {
 			case "testGetLastRestoreTime":
 				tct.testGetLastRestoreTime();
 				break;
+			case "testGetProcessRestoreStartTime":
+				tct.testGetProcessRestoreStartTime();
+				break;
 			case "testMXBeanUpTime":
 				tct.testMXBeanUpTime();
 				break;
@@ -228,10 +231,10 @@ private void testGetLastRestoreTime() {
 					+ " should be -1 before restore");
 		}
 		CRIUSupport criu = CRIUTestUtils.prepareCheckPointJVM(CRIUTestUtils.imagePath);
-		long beforeCheckpoint = System.currentTimeMillis();
+		long beforeCheckpoint = TimeUtilities.getCurrentTimeInNanoseconds();
 		CRIUTestUtils.checkPointJVMNoSetup(criu, CRIUTestUtils.imagePath, false);
 		lastRestoreTime = InternalCRIUSupport.getLastRestoreTime();
-		long afterRestore = System.currentTimeMillis();
+		long afterRestore = TimeUtilities.getCurrentTimeInNanoseconds();
 		if (beforeCheckpoint >= lastRestoreTime) {
 			System.out.println("FAILED: InternalCRIUSupport.getLastRestoreTime() - " + lastRestoreTime
 					+ " can't be less than the beforeCheckpoint time - " + beforeCheckpoint);
@@ -245,6 +248,33 @@ private void testGetLastRestoreTime() {
 		}
 	}
 
+	private void testGetProcessRestoreStartTime() {
+		long processRestoreStartTime = InternalCRIUSupport.getProcessRestoreStartTime();
+		if (processRestoreStartTime != -1) {
+			System.out.println("FAILED: InternalCRIUSupport.getProcessRestoreStartTime() - " + processRestoreStartTime
+					+ " is not -1 before restore");
+		}
+		CRIUSupport criu = CRIUTestUtils.prepareCheckPointJVM(CRIUTestUtils.imagePath);
+		long beforeCheckpointTime = TimeUtilities.getCurrentTimeInNanoseconds();
+		CRIUTestUtils.checkPointJVMNoSetup(criu, CRIUTestUtils.imagePath, false);
+		processRestoreStartTime = InternalCRIUSupport.getProcessRestoreStartTime();
+		long lastRestoreTime = InternalCRIUSupport.getLastRestoreTime();
+		long afterRestoreTime = TimeUtilities.getCurrentTimeInNanoseconds();
+		if (beforeCheckpointTime >= processRestoreStartTime) {
+			System.out.println("FAILED: InternalCRIUSupport.getProcessRestoreStartTime() - " + processRestoreStartTime
+					+ " is less than beforeCheckpointTime - " + beforeCheckpointTime);
+		} else if (processRestoreStartTime >= lastRestoreTime) {
+			System.out.println("FAILED: InternalCRIUSupport.getProcessRestoreStartTime() - " + processRestoreStartTime
+					+ " is more than InternalCRIUSupport.getLastRestoreTime() - " + lastRestoreTime);
+		} else if (processRestoreStartTime >= afterRestoreTime) {
+			System.out.println("FAILED: InternalCRIUSupport.getProcessRestoreStartTime() - " + processRestoreStartTime
+					+ " is more than afterRestoreTime - " + afterRestoreTime);
+		} else {
+			System.out.println("PASSED: InternalCRIUSupport.getProcessRestoreStartTime() - " + processRestoreStartTime
+					+ " is between beforeCheckpointTime - " + beforeCheckpointTime + " and afterRestoreTime - " + afterRestoreTime);
+		}
+	}
+
 	private void testMXBeanUpTime() {
 		CRIUSupport criu = CRIUTestUtils.prepareCheckPointJVM(CRIUTestUtils.imagePath);
 		RuntimeMXBean mxb = ManagementFactory.getRuntimeMXBean();