Changeset 138336 in webkit

Timestamp:

Dec 20, 2012, 6:35:48 PM (13 years ago)

Author:

commit-queue@webkit.org

Message:

Set timer coalescing policy for WebKit2 processes on Mac until process visible assertion handles it automatically
​https://bugs.webkit.org/show_bug.cgi?id=105594

Patch by Kiran Muppala <​cmuppala@apple.com> on 2012-12-20
Reviewed by Mark Rowe.

• Shared/mac/ChildProcessMac.mm:

(WebKit::initializeTimerCoalescingPolicy): Set task_latency and task_throughput QOS tiers as appropriate
for visible applications.
(WebKit::ChildProcess::platformInitialize): Add call to initializeTimerCoalescingPolicy.

Location:

trunk/Source/WebKit2

Files:

• ChangeLog (modified) (1 diff)
• Shared/mac/ChildProcessMac.mm (modified) (1 diff)

trunk/Source/WebKit2/ChangeLog

@@ +1 @@
+2012-12-20  Kiran Muppala  <cmuppala@apple.com>
+
+        Set timer coalescing policy for WebKit2 processes on Mac until process visible assertion handles it automatically
+        https://bugs.webkit.org/show_bug.cgi?id=105594
+
+        Reviewed by Mark Rowe.
+
+        * Shared/mac/ChildProcessMac.mm:
+        (WebKit::initializeTimerCoalescingPolicy): Set task_latency and task_throughput QOS tiers as appropriate
+        for visible applications.
+        (WebKit::ChildProcess::platformInitialize): Add call to initializeTimerCoalescingPolicy.
+
 2012-12-20  Anders Carlsson  <andersca@apple.com>
 

trunk/Source/WebKit2/Shared/mac/ChildProcessMac.mm

@@ -45 +45 @@
 }
 
+#if __MAC_OS_X_VERSION_MIN_REQUIRED >= 1090
+static void initializeTimerCoalescingPolicy()
+{
+    // Set task_latency and task_throughput QOS tiers as appropriate for a visible application.
+    struct task_qos_policy qosinfo = { LATENCY_QOS_TIER_0, THROUGHPUT_QOS_TIER_0 };
+    kern_return_t kr = task_policy_set(mach_task_self(), TASK_BASE_QOS_POLICY, (task_policy_t)&qosinfo, TASK_QOS_POLICY_COUNT);
+    ASSERT_UNUSED(kr, kr == KERN_SUCCESS);
+}
+#endif
+
 void ChildProcess::platformInitialize()
 {
 #if __MAC_OS_X_VERSION_MIN_REQUIRED >= 1090
     setpriority(PRIO_DARWIN_PROCESS, 0, 0);
+    initializeTimerCoalescingPolicy();
 #endif
     setApplicationIsOccluded(false);