[vbox-dev] Excessive load averages with nothing running.

[Perry Halbert]

Good morning ram,

Yes it does in fact take care of the excessive load.

Thanks for the patch my friend.

Have a great day,

Perry

On 07/13/2015 04:22 AM, Ramshankar wrote:
> 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 <phalbert at cox.net> 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
>>>
>>>
>>> _______________________________________________
>>> vbox-dev mailing list
>>> vbox-dev at virtualbox.org
>>> https://www.virtualbox.org/mailman/listinfo/vbox-dev
>>>
>>
>>
>

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