Changeset 89829 in vbox for trunk/src/VBox/VMM

Timestamp:

Jun 22, 2021 11:57:02 AM (4 years ago)

Author:

vboxsync

Message:

VMM/DBGFR3SampleReport: Sort the frame order by sample count to quickly see where the guest spents most of its time, bugref:10025

File:

• trunk/src/VBox/VMM/VMMR3/DBGFR3SampleReport.cpp (modified) (3 diffs)

trunk/src/VBox/VMM/VMMR3/DBGFR3SampleReport.cpp

@@ -41 +41 @@
 #include <iprt/time.h>
 #include <iprt/timer.h>
+#include <iprt/sort.h>
 #include <iprt/string.h>
 #include <iprt/stream.h>
@@ -333 +334 @@
 
 /**
+ * @copydoc FNRTSORTCMP
+ */
+static DECLCALLBACK(int) dbgfR3SampleReportFrameSortCmp(void const *pvElement1, void const *pvElement2, void *pvUser)
+{
+    RT_NOREF(pvUser);
+    PCDBGFSAMPLEFRAME pFrame1 = (PCDBGFSAMPLEFRAME)pvElement1;
+    PCDBGFSAMPLEFRAME pFrame2 = (PCDBGFSAMPLEFRAME)pvElement2;
+
+    if (pFrame1->cSamples < pFrame2->cSamples)
+        return 1;
+    if (pFrame1->cSamples > pFrame2->cSamples)
+        return -1;
+
+    return 0;
+}
+
+
+/**
  * Dumps a single given frame to the release log.
  *
@@ -369 +388 @@
     else
         pHlp->pfnPrintf(pHlp, "%*s%RU64 %RGv\n", idxFrame * 4, " ", pFrame->cSamples, pFrame->AddrFrame.FlatPtr);
+
+    /* Sort by sample count. */
+    RTSortShell(pFrame->paFrames, pFrame->cFramesValid, sizeof(*pFrame->paFrames), dbgfR3SampleReportFrameSortCmp, NULL);
 
     for (uint32_t i = 0; i < pFrame->cFramesValid; i++)