Changeset 70018 in vbox

Timestamp:

Dec 8, 2017 12:07:41 PM (7 years ago)

Author:

vboxsync

Message:

VMM/TM: Added a CFGM value TM/UTCTouchFileOnJump to give a file to be written to every time the UTC time used by time sync jumps.

Location:

trunk/src/VBox/VMM

Files:

• VMMR3/TM.cpp (modified) (5 diffs)
• include/TMInternal.h (modified) (1 diff)

trunk/src/VBox/VMM/VMMR3/TM.cpp

@@ -148 +148 @@
 #include <iprt/asm-math.h>
 #include <iprt/assert.h>
+#include <iprt/file.h>
 #include <iprt/thread.h>
 #include <iprt/time.h>
@@ -347 +348 @@
                               "CatchUpPrecentage8|CatchUpPrecentage9|"
                               "UTCOffset|"
+                              "UTCTouchFileOnJump|"
                               "WarpDrivePercentage|"
                               "HostHzMax|"
@@ -354 +356 @@
                               "HostHzFudgeFactorCatchUp200|"
                               "HostHzFudgeFactorCatchUp400|"
-                              "TimerMillies",
+                              "TimerMillies"
+                              ,
                               "",
                               "TM", 0);
@@ -538 +541 @@
         return VMSetError(pVM, rc, RT_SRC_POS,
                           N_("Configuration error: Failed to querying 64-bit integer value \"UTCOffset\""));
+
+    /** @cfgm{/TM/UTCTouchFileOnJump, string, none}
+     * File to be written to everytime the host time jumps.  */
+    rc = CFGMR3QueryStringAlloc(pCfgHandle, "UTCTouchFileOnJump", &pVM->tm.s.pszUtcTouchFileOnJump);
+    if (rc == VERR_CFGM_VALUE_NOT_FOUND)
+        pVM->tm.s.pszUtcTouchFileOnJump = NULL;
+    else if (RT_FAILURE(rc))
+        return VMSetError(pVM, rc, RT_SRC_POS,
+                          N_("Configuration error: Failed to querying string value \"UTCTouchFileOnJump\""));
 
     /*
@@ -2837 +2849 @@
     int64_t cNsDelta = RTTimeSpecGetNano(pTime) - nsPrev;
     if ((uint64_t)RT_ABS(cNsDelta) > RT_NS_1HOUR / 2)
-        LogRel(("TMR3UtcNow: nsNow=%'RI64 nsPrev=%'RI64 -> cNsDelta=%'RI64 (offLag=%'RI64 offVirtualSync=%'RU64 offVirtualSyncGivenUp=%'RU64)\n",
-                RTTimeSpecGetNano(pTime), nsPrev, cNsDelta, offLag, offVirtualSync, offVirtualSyncGivenUp));
+    {
+        RTTIMESPEC NowAgain;
+        RTTimeNow(&NowAgain);
+        LogRel(("TMR3UtcNow: nsNow=%'RI64 nsPrev=%'RI64 -> cNsDelta=%'RI64 (offLag=%'RI64 offVirtualSync=%'RU64 offVirtualSyncGivenUp=%'RU64, NowAgain=%'RI64)\n",
+                RTTimeSpecGetNano(pTime), nsPrev, cNsDelta, offLag, offVirtualSync, offVirtualSyncGivenUp, RTTimeSpecGetNano(&NowAgain)));
+        if (pVM->tm.s.pszUtcTouchFileOnJump && nsPrev != 0)
+        {
+            RTFILE hFile;
+            int rc = RTFileOpen(&hFile, pVM->tm.s.pszUtcTouchFileOnJump,
+                                RTFILE_O_WRITE | RTFILE_O_APPEND | RTFILE_O_OPEN_CREATE | RTFILE_O_DENY_NONE);
+            if (RT_SUCCESS(rc))
+            {
+                char   szMsg[256];
+                size_t cch;
+                cch = RTStrPrintf(szMsg, sizeof(szMsg),
+                                  "TMR3UtcNow: nsNow=%'RI64 nsPrev=%'RI64 -> cNsDelta=%'RI64 (offLag=%'RI64 offVirtualSync=%'RU64 offVirtualSyncGivenUp=%'RU64, NowAgain=%'RI64)\n",
+                                  RTTimeSpecGetNano(pTime), nsPrev, cNsDelta, offLag, offVirtualSync, offVirtualSyncGivenUp, RTTimeSpecGetNano(&NowAgain));
+                RTFileWrite(hFile, szMsg, cch, NULL);
+                RTFileClose(hFile);
+            }
+        }
+    }
 
     return pTime;

trunk/src/VBox/VMM/include/TMInternal.h

@@ -495 +495 @@
     /** The last value TMR3UtcNow returned. */
     int64_t volatile            nsLastUtcNow;
+    /** File to touch on UTC jump. */
+    R3PTRTYPE(char *)           pszUtcTouchFileOnJump;
+    /** Just to avoid dealing with 32-bit alignment trouble. */
+    R3PTRTYPE(char *)           pszAlignment2b;
 
     /** Timer queues for the different clock types - R3 Ptr */