Changeset 34586 in vbox for trunk/src/VBox/VMM

Timestamp:

Dec 1, 2010 8:08:49 PM (14 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

68383

Message:

AsyncCompletion: Allow to change bandwidth limits during runtime

File:

• trunk/src/VBox/VMM/PDMAsyncCompletion.cpp (modified) (2 diffs)

trunk/src/VBox/VMM/PDMAsyncCompletion.cpp

@@ -874 +874 @@
 
                             if (RT_SUCCESS(rc))
-                                rc = CFGMR3QueryU32(pCur, "Start", &cbStart);
-                            if (RT_SUCCESS(rc))
                                 rc = CFGMR3QueryU32(pCur, "Max", &cbMax);
                             if (RT_SUCCESS(rc))
-                                rc = CFGMR3QueryU32(pCur, "Step", &cbStep);
+                                rc = CFGMR3QueryU32Def(pCur, "Start", &cbStart, cbMax);
+                            if (RT_SUCCESS(rc))
+                                rc = CFGMR3QueryU32Def(pCur, "Step", &cbStep, 0);
                             if (RT_SUCCESS(rc))
                                 rc = pdmacAsyncCompletionBwMgrCreate(pEndpointClass, pszBwGrpId, cbMax, cbStart, cbStep);
@@ -1583 +1583 @@
 }
 
+VMMR3DECL(int) PDMR3AsyncCompletionBwMgrSetMaxForFile(PVM pVM, const char *pcszBwMgr, uint32_t cbMaxNew)
+{
+    int rc = VINF_SUCCESS;
+    AssertPtrReturn(pVM, VERR_INVALID_POINTER);
+    AssertPtrReturn(pcszBwMgr, VERR_INVALID_POINTER);
+    PPDMACBWMGR pBwMgr;
+
+    PPDMASYNCCOMPLETIONEPCLASS pEpClass = pVM->pUVM->pdm.s.apAsyncCompletionEndpointClass[PDMASYNCCOMPLETIONEPCLASSTYPE_FILE];
+
+    pBwMgr = pdmacBwMgrFindById(pEpClass, pcszBwMgr);
+    if (pBwMgr)
+    {
+        /*
+         * Set the new value for the start and max value to let the manager pick up
+         * the new limit immediately.
+         */
+        ASMAtomicXchgU32(&pBwMgr->cbTransferPerSecMax, cbMaxNew);
+        ASMAtomicXchgU32(&pBwMgr->cbTransferPerSecStart, cbMaxNew);
+    }
+    else
+        rc = VERR_NOT_FOUND;
+
+    return rc;
+}
+