On 07/12/2015 05:53 PM, Alessandro Suardi wrote:
Linux bumps up load average by 1 for each process in D state - so the point here
is not that something is being used (it isn't), but why is
iprt-VBoxTscThr in D state?
Devs might find helpful a
$ ps auxww|grep iprt-VBoxTscThr
since that would should the kernel WCHAN where the thread is stuck.
It's not really stuck, the TSC delta thread in the support driver is
doing an uninterruptible sleep, see supdrvTscDeltaThread() function.
https://www.virtualbox.org/browser/vbox/trunk/src/VBox/HostDrivers/Support/SUPDrvGip.cpp
Under kTscDeltaThreadState_Listening case label; you will see that we
are doing a RTThreadUserWait() which does an uninterruptible sleep
waiting to be woken up by an event from the main thread in the
VirtualBox driver if necessary.
Does the attached patch make any difference for you?
Regards,
Ram.
Cheers,
On Sat, Jul 11, 2015 at 6:18 PM, Perry Halbert <[email protected]> wrote:
Builds are done from SVN but the issue is also present in released V-5
build. Linux is all I use so I can't tell you about Win or Mac.
Issue with loads when no guests, VBoxsvc, or VBox manager are running, just
the kernel modules active.
with running vboxdrv modules
uptime shows load average: 1.24, 1.18, 0.84
show running services associated to VBox shows the following:
ps -awx | grep V
13713 ? S< 0:00 [iprt-VBoxWQueue]
13717 ? D 0:00 [iprt-VBoxTscThr]
After stopping vboxdrv modules
load average: 0.11, 0.09, 0.16
I have tried building without the new services plus a few more I thought
might have been causing this, DnD, Crypt, Webservice, HIDPI, and SDL with
the following in the LocalConfig.kmk but results were the same as with or
without.
VBOX_WITH_DRAG_AND_DROP =
VBOX_WITH_PLUGIN_CRYPT =
VBOX_WITH_WEBSERVICES =
VBOX_WITH_WEBSERVICES_SSL =
VBOX_GUI_WITH_HIDPI =
VBOX_WITH_VBOXSDL =
The loads with vboxdrv modules enabled ( default ) are constant and never go
below at least 1.24 which seems a little excessive to me when nothing is
actually being used. Any thoughts on the matter or advice on what to look
for?
Perry
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Index: src/VBox/HostDrivers/Support/SUPDrvGip.cpp
===================================================================
--- src/VBox/HostDrivers/Support/SUPDrvGip.cpp (revision 101610)
+++ src/VBox/HostDrivers/Support/SUPDrvGip.cpp (working copy)
@@ -4092,9 +4092,10 @@
pDevExt->cMsTscDeltaTimeout = 500;
cConsecutiveTimeouts = 0;
}
- rc = RTThreadUserWait(pDevExt->hTscDeltaThread, pDevExt->cMsTscDeltaTimeout);
+ rc = RTThreadUserWaitNoResume(pDevExt->hTscDeltaThread, pDevExt->cMsTscDeltaTimeout);
if ( RT_FAILURE(rc)
- && rc != VERR_TIMEOUT)
+ && rc != VERR_TIMEOUT
+ && rc != VERR_INTERRUPTED)
return supdrvTscDeltaThreadButchered(pDevExt, false /* fSpinlockHeld */, "RTThreadUserWait", rc);
RTThreadUserReset(pDevExt->hTscDeltaThread);
break;
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