1249036 - Locking up in WinUtils::dwmGetCompositionTimingInfoPtr

Status: RESOLVED FIXED

(Core :: Graphics, defect, major)

Description

[Mike Conley (:mconley) (:⚙️) (Wayyyy behind on needinfos)]

I've been hitting this off and on for a few days - suddenly, my Nightly will become completely unresponsive, and then I'll get the "process not responding" spinner from Windows, and I have to manually kill the process.

Today, I made sure I had the right revision checked out of mozilla-central for the build I was running, and once I locked up, got a stack:

>	dwmapi.dll!CPortClient::SendComplexSyncRequestNative(unsigned long,void const *,short,void *,short,long *)	Unknown
 	dwmapi.dll!CPortClient::SendComplexSyncRequest(unsigned long,void const *,short,void *,short,long *)	Unknown
 	dwmapi.dll!CApiPortClient::SendRequest(void const *,short,long *,void *,short)	Unknown
 	dwmapi.dll!DwmFlush()	Unknown
 	xul.dll!D3DVsyncSource::D3DVsyncDisplay::VBlankLoop() Line 2763	C++
 	xul.dll!RunnableMethod<mozilla::ipc::MessageChannel,void (__cdecl mozilla::ipc::MessageChannel::*)(void) __ptr64,mozilla::Tuple<> >::Run() Line 308	C++
 	xul.dll!MessageLoop::DoWork() Line 459	C++
 	xul.dll!base::MessagePumpDefault::Run(base::MessagePump::Delegate * delegate) Line 35	C++
 	xul.dll!MessageLoop::RunHandler() Line 228	C++
 	xul.dll!MessageLoop::Run() Line 202	C++
 	xul.dll!base::Thread::ThreadMain() Line 175	C++
 	xul.dll!`anonymous namespace'::ThreadFunc(void * closure) Line 27	C++

So apparently I was locking up here: https://dxr.mozilla.org/mozilla-central/rev/6ea654cad929c9bedd8a4161a182b6189fbeae6a/gfx/thebes/gfxWindowsPlatform.cpp#2763

Comment 1

[Mike Conley (:mconley) (:⚙️) (Wayyyy behind on needinfos)]

Hit this thing twice today now.

Here's my about:support:

Application Basics
------------------

Name: Firefox
Version: 47.0a1
Build ID: 20160217030229
Update Channel: nightly
User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:47.0) Gecko/20100101 Firefox/47.0
OS: Windows_NT 6.1 x86-64
Multiprocess Windows: 1/1 (Enabled by user)
Safe Mode: false

Crash Reports for the Last 3 Days
---------------------------------

All Crash Reports

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Adapter RAM: Unknown
Asynchronous Pan/Zoom: wheel input enabled; touch input enabled
Device ID: 0x010a
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windowLayerManagerRemote: true
AzureCanvasBackend: direct2d 1.1
AzureContentBackend: direct2d 1.1
AzureFallbackCanvasBackend: cairo
AzureSkiaAccelerated: 0

Important Modified Preferences
------------------------------

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privacy.clearOnShutdown.offlineApps: true
privacy.donottrackheader.enabled: true
privacy.sanitize.migrateClearSavedPwdsOnExit: true
privacy.sanitize.migrateFx3Prefs: true
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security.disable_button.openCertManager: false
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services.sync.declinedEngines: passwords
services.sync.engine.prefs.modified: false
services.sync.lastPing: 1455644498
services.sync.lastSync: Tue Feb 16 2016 12:56:14 GMT-0500 (Eastern Standard Time)
services.sync.numClients: 3
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storage.vacuum.last.places.sqlite: 1454521987

Important Locked Preferences
----------------------------

JavaScript
----------

Incremental GC: true

Accessibility
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Activated: false
Prevent Accessibility: 0

Library Versions
----------------

NSPR
Expected minimum version: 4.12 Beta
Version in use: 4.12 Beta

NSS
Expected minimum version: 3.23 Basic ECC Beta
Version in use: 3.23 Basic ECC Beta

NSSSMIME
Expected minimum version: 3.23 Basic ECC Beta
Version in use: 3.23 Basic ECC Beta

NSSSSL
Expected minimum version: 3.23 Basic ECC Beta
Version in use: 3.23 Basic ECC Beta

NSSUTIL
Expected minimum version: 3.23 Beta
Version in use: 3.23 Beta

Experimental Features
---------------------

Name: Invisible test of the experiment branching system.
ID: [e-mail]
Description: An experiment using branches just to test whether branches get saved correctly.
Active: false
End Date: 1409600592348
Homepage:
Branch: 4

Name: tile switcher
ID: [e-mail]
Description: An add-on which switches the location of NewTab tiles.
Active: false
End Date: 1399494158646
Homepage:
Branch: null

Comment 2

[Mike Conley (:mconley) (:⚙️) (Wayyyy behind on needinfos)]

Hey Mason,

Milan said you might be interested in this. Also cc'ing gw280 who was interested.

-Mike

Comment 3

[Mason Chang [Inactive] [:mchang]]

(In reply to Mike Conley (:mconley) - Needinfo me! from comment #2)
> Hey Mason,
> 
> Milan said you might be interested in this. Also cc'ing gw280 who was
> interested.
> 
> -Mike

That's an odd bug. Did you update drivers recently? Does it still happen on a clean profile? How often does it happen?

Comment 4

[Mike Conley (:mconley) (:⚙️) (Wayyyy behind on needinfos)]

(In reply to Mason Chang [:mchang] from comment #3)
> (In reply to Mike Conley (:mconley) - Needinfo me! from comment #2)
> > Hey Mason,
> > 
> > Milan said you might be interested in this. Also cc'ing gw280 who was
> > interested.
> > 
> > -Mike
> 

Hey mchang, sorry for the delay. I was away from my machine since last Friday.

> That's an odd bug. Did you update drivers recently?

I had not when I originally filed this bug, but you asking that prompted me to update my drivers since it turned out I was a few versions behind. So I hit them before with the old drivers, and I hit them again today with the newer ones.

> Does it still happen on
> a clean profile?

Unsure. I've certainly not experienced it with anything except my default profile here.

> How often does it happen?

Pretty frequently. It's hit me 3 times within the past 3 hours today.

Comment 5

[Mason Chang [Inactive] [:mchang]]

This is odd. Does it also happen with e10s disabled?

Can you also try these debug builds? It has some logging around vsync. (builds should be ready in 2-3 hours from this posting).

https://archive.mozilla.org/pub/firefox/try-builds/[e-mail]-123cf87571c417554622d9897c1bebd4227390ab/

Thanks!

Comment 6

[Mike Conley (:mconley) (:⚙️) (Wayyyy behind on needinfos)]

I ran with a new profile today, and didn't run into it. I'll try your build with my original profile tomorrow. Thanks!

Comment 7

[Mason Chang [Inactive] [:mchang]]

(In reply to Mike Conley (:mconley) - Needinfo me! from comment #6)
> I ran with a new profile today, and didn't run into it. I'll try your build
> with my original profile tomorrow. Thanks!

Great, if you aren't running into it, can you please attach any logs you have here please? I kind of want to see which error you're hitting and we're correcting for. Thanks!

Comment 8

[Mike Conley (:mconley) (:⚙️) (Wayyyy behind on needinfos)]

I ran with the debug build on my default profile all day and didn't hit the snag. When I started up a normal Nightly today with that profile, I locked immediately.

So I restarted the debug build and captured the logging output for a bit of running time. Is this at all useful?

Comment 9

[Mike Conley (:mconley) (:⚙️) (Wayyyy behind on needinfos)]

Attachment: locking.zip

Whoa! When I was about to attach my zip of the log of me _not_ logging, I locked as soon as I opened the File Attachment window. Luckily, I captured that log, which I'm attaching now.

Comment 10

[Mike Conley (:mconley) (:⚙️) (Wayyyy behind on needinfos)]

Attachment: no-locking.zip

Here's the log of me not locking up.

Comment 11

[Mason Chang [Inactive] [:mchang]]

Attachment: Check that DWM Flush Executes Correctly

I think either DWMFlush or DWMGetCompositionTimingInfo failed here. The logs didn't actually have any data in them, which is odd, but it fixed the issue for Mike.

@Mike - Can you also please try this build and verify it fixes the issue for you - https://archive.mozilla.org/pub/firefox/try-builds/[e-mail]-e064f253db382a57fbe85d7f1b04ee563e563eba/ - Also, if you happen to run the debug log and see lots of spew, please paste the spew here.

Comment 12

[Kartikaya Gupta (email:[e-mail]) (away until Feb-2020)]

Comment on attachment 8723694 [details] [diff] [review]
Check that DWM Flush Executes Correctly

Review of attachment 8723694 [details] [diff] [review]:
-----------------------------------------------------------------

r=me with comments addressed

::: gfx/thebes/gfxWindowsPlatform.cpp
@@ +2799,2 @@
>            if (SUCCEEDED(hr)) {
> +            hr = WinUtils::dwmGetCompositionTimingInfoPtr(0, &vblankTime);

I'd prefer structuring this with less nesting so it's a bit easier to read:

if (!SUCCEEDED(hr)) {
  // ...
  continue;
}

hr = WinUtils::dwmGetCompositionTimingInfoPtr(...);
if (!SUCCEEDED(hr)) {
  // ...
  continue;
}

vsync = ...;

@@ +2808,5 @@
> +            // We don't actually know how long we had to wait on DWMFlush
> +            // Instead of trying to calculate how long DwmFlush actually took,
> +            // fallback to software vsync for this one interval and hope
> +            // the DWM comes back up on the next interval.
> +            NS_WARNING("DWM Flush failed. Scheduling a software vsync\n");

drop this warning, it has the potential to flood logs if for some reason we hit this every time. Either that or guard it with something so that it only happens once.

Comment 13

[Mike Conley (:mconley) (:⚙️) (Wayyyy behind on needinfos)]

I ran your build today, and it ran really well, up until about a minute ago, when it hung. I didn't have the wit to grab the symbols, so I wasn't able to be certain that it was the same hang.

So, observation:

1) Your patch either fixed it, or
2) Your patch made it a lot more rare

I'll start running with the debug version now.

Comment 14

[Mason Chang [Inactive] [:mchang]]

Attachment: Check that DWMFlush executes correctly

Carrying r+, updated with :kats feedback. Successful try: https://hg.mozilla.org/try/rev/04de8395d4f3

Comment 15

[Pulsebot]

https://hg.mozilla.org/integration/mozilla-inbound/rev/bf9ed0ec3270

Comment 16

[Carsten Book [:Tomcat]]

https://hg.mozilla.org/mozilla-central/rev/bf9ed0ec3270

Comment 17

[Mike Conley (:mconley) (:⚙️) (Wayyyy behind on needinfos)]

I think the less frequent hang I'm hitting now is unrelated - filed bug 1252587.

Comment 18

[Mason Chang [Inactive] [:mchang]]

Comment on attachment 8724680 [details] [diff] [review]
Check that DWMFlush executes correctly

Approval Request Comment
[Feature/regressing bug #]: Silk
[User impact if declined]: Sometimes random long hangs on Windows.
[Describe test coverage new/current, TreeHerder]: Manual, treeherder
[Risks and why]: Low - This fallsback to software if windows vsync sometimes intermittently fails.
[String/UUID change made/needed]: None

Comment 19

[Liz Henry (:lizzard)]

Marking affected for 46.

Comment 20

[Liz Henry (:lizzard)]

Comment on attachment 8724680 [details] [diff] [review]
Check that DWMFlush executes correctly

Fix for a Windows hang, tested manually, let's try this on 46 too.

Comment 21

[Wes Kocher (:KWierso)]

https://hg.mozilla.org/releases/mozilla-aurora/rev/c0194213348e