1871207 - Offscreen canvas testcase from bug 1870488 will quickly eat up all RAM on Windows (GPU-canvas), cause computer crash and generate gfx-logs

Status: RESOLVED DUPLICATE of bug 1870488

(Core :: Graphics: Canvas2D, defect, P5)

Description

[Mayank Bansal]

Use latest Nightly
Set the following :
gfx.direct2d.disabled = true
gfx.canvas.accelerated = true
gfx.canvas.remote.worker-threads = 0

Open the testcase from bug 1870488 (https://bugzilla.mozilla.org/attachment.cgi?id=9369102)

AR:

1. The VRAM quickly starts increasing (The process level RAM doesnt increase, but the total system-level RAM increases)
2. The GPU use is very low (pre-regression ,it was 50%)
3. Rapid fluctuation in process-level RAM (250MB-700MB)
   After a while, my computer would freeze

Regression range:

Bug 1829026 - Handle KERN_ABORTED from semaphore_wait. r=aosmond

semaphore_wait and semaphore_timedwait can return KERN_ABORTED, much
like POSIX semaphores can return EINTR, and need to restart their
waits for correct behavior.

Differential Revision: https://phabricator.services.mozilla.com/D195952

Edit : These STR/regression range are for GPU-canvas only. For D2D-canvas, I filed bug 1871208 for easier tracking.

Comment 1

[Mayank Bansal]

Attachment: about:support

Comment 2

[Mayank Bansal]

Attachment: log.txt-main.3292.moz_log

Comment 3

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1829026

:lsalzman, since you are the author of the regressor, bug 1829026, could you take a look? Also, could you set the severity field?

For more information, please visit BugBot documentation.

Comment 4

[Lee Salzman [:lsalzman]]

Since this expression of the bug is in a not-enabled-by-default config, this is not that alarming right now. It also seems like this pre-existed bug 1829026, and this is just about a new interaction with that.

Comment 5

[Bob Hood [:bhood]]

Lee, the Severity seems low on this one for the number of affected users. Should we bump it up?

Comment 6

[Lee Salzman [:lsalzman]]

It's fine. This is not a default config.