1182600 - Angry Bots regresses from running fine to getting OOM killed and other Unity 5 Games don't work on FFOS

Status: RESOLVED INCOMPLETE

(Core :: JavaScript Engine, defect)

Description

[:Harald Kirschner :digitarald]

Regression started to happen on my Z3C after a dogfooding update on Thu 11.

Steps:
- Install the game via http://duct.io/ab/hk/install.html
- Launch it
- Click OK in the Unity dialog

Expected:
- Game runs

Actually:
- Game crashes

--- snip
E/OomLogger(  317): [Kill]: send sigkill to 2006 (Usage), adj 801, size 7862
E/OomLogger(  317): [Kill]: send sigkill to 1621 (Find My Device), adj 801, size 7123
E/OomLogger(  317): [Kill]: send sigkill to 2322 (Browser), adj 734, size 8930
E/OomLogger(  317): [Kill]: send sigkill to 2496 (Browser), adj 667, size 8433
E/OomLogger(  317): [Kill]: send sigkill to 1442 (Built-in Keyboa), adj 667, size 8229
E/OomLogger(  317): [Kill]: send sigkill to 2879 (Angry Bots), adj 134, size 360969
--- snip

Comment 1

[:Harald Kirschner :digitarald]

Attachment: adb.log

Logcat

Comment 2

[Kate Glazko]

Hi Benoit,
Can we get the right pair of eyes on this? This is causing Unity games to break.

Comment 3

[Kate Glazko]

Hi Marcia, it looks like Unity games are broken somewhat in FFOS, do you know who to direct this to?

Comment 4

[Marcia Knous [:marcia]]

(In reply to Kate Glazko from comment #3)
> Hi Marcia, it looks like Unity games are broken somewhat in FFOS, do you
> know who to direct this to?

Guessing someone in Milan's team that works on WebGL/Games. On my Z3 running the latest nightly, I get this error "Please note that Unity WebGL is not currently supported on mobiles. Press OK if you wish to continue anyways." Using BuildID=

Gaia-Rev        bdddfe1ebb796e2bc1c048d5c4e0f97f3d06f98b
Gecko-Rev       https://hg.mozilla.org/mozilla-central/rev/adfdc7f29ba7
Build-ID        20150709173238
Version         42.0a1
Device-Name     aries
FW-Release      4.4.2
FW-Incremental  eng.worker.20150619.224059
FW-Date         Fri Jun 19 22:41:08 UTC 2015
Bootloader      s1

Comment 5

[Milan Sreckovic [:milan] (needinfo for best results)]

Probably best to start with Jukka, he has the most holistic view of the whole thing.

Comment 6

[Jukka Jylänki]

I'm currently on vacation until August 3rd, but quick questions:
   - is there a tight regression range available somewhere? (btw, how does one bisect builds with the new Z3 phone?)
   - if I'm reading the OOM log correctly, AngryBots is taking up 360969KB of memory. That does not sound that much. How much memory does AngryBots use when running on the working FFOS build?

The potential culprits here are either:
   a) some permanent memory data structure has become fatter, causing the increased size and OOM
   b) some temporary operation that AngryBots does has regressed to require a bigger memory footprint, and OOM
   c) running AngryBots was already very close to the limit of the available memory size, and some other application in the system has regressed to requiring a larger memory size, and there is less space for AngryBots to run, causing the OOM.

Running the ADB shell top and ps commands should give data on this, i.e. "adb shell top" and so on.

Comment 7

[Kate Glazko]

If this is happening to all Unity games for FFOS, this sounds like a regression with a lot of user impact for indie game devs.

Comment 8

[Kate Glazko]

Attachment: Another Unity 5 WebGL Game Doesn't work on FFOS

Comment 9

[:Harald Kirschner :digitarald]

Paul, can you take shot at profiling the game from a Web Audio perspective; I wouldn't know what to look for.

Comment 10

[Paul Adenot (:padenot)]

I don't think we made significant enough changes on Web Audio API lately, apart from the optimization we made so that it runs, which reduced memory usage.

Comment 11

[Kate Glazko]

Is there any way to verify whether all Unity games are broken on FFOS?

Comment 12

[:Harald Kirschner :digitarald]

AB is a good test for now as it was confirmed to work before. We didn't test other games and having one game that is known to work is best.

I will downgrade my Z3C to get the build for a working version.

Comment 13

[Ryan VanderMeulen [:RyanVM]]

Any updates since comment 12, Harald?

Comment 14

[:Harald Kirschner :digitarald]

This got onto my backlog for a while. I will run this against the latest Z3C version and see if I can still reproduce.

Comment 15

[:Harald Kirschner :digitarald]

No Unity games are planned for FxOS, closing.