1682591 - Very High VRAM Usage from PDF Viewing [v83]

Status: RESOLVED INVALID

(Firefox :: PDF Viewer, defect)

Description

[riasat]

Attachment: Screenshot 2020-12-15 230354.png

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:83.0) Gecko/20100101 Firefox/83.0

Steps to reproduce:

I have 3 sets of tabs open.
Each set contains

• 1 gmail tab
• 1 bitbucket tab
• 1 aws console tab (login page)

A few additional tabs of normal websites which are not doing anything fancy.

All windows are not in focus; in other virtual desktop etc.

Spec:
Ryzen 3950x
64GB RAM
GTX 980Ti (6GB VRAM)

Please let me know what reports I can submit for analysis.

Actual results:

Extremely high VRAM usage to the point other applications have issues (such as games not loading texture). Firefox alone eats up 2.5GB+ VRAM.

Expected results:

Firefox should not use such high amount of VRAM; esp not when in use/focus.
It should free VRAM for other programs as they need it.

Having even 50 tabs on Chrome/Edge would not come this close to VRAM usage.

Comment 1

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

Bugbug thinks this bug should belong to this component, but please revert this change in case of error.

Comment 2

[riasat]

Attachment: image.png

This is the VRAM usage for a fresh firefox and chrome started with each:
4 Gmail tabs
4 Bitbucket tabs
4 AWS Console tabs
3 JIRA tabs
and this bugzilla page.

Chrome using 500MB VRAM. Firefox is already at 1GB+ VRAM. This same thing will shoot above 2GB with time while chrome will mostly stay same.

Comment 3

[riasat]

Please disregard my previous comments. I have been able to reliably reproduce the issue.

I opened firefox. VRAM usage ~200MB.
I opened a PDF. VRAM usage ~500MB.
Started scrolling. VRAM usage shot up to 3GB.

This is a simple 1.5MB 136 pages PDF with text (some API documentation).

Comment 4

[riasat]

I am attaching a video of the memory usage. Video link: https://1drv.ms/v/s!AqOg7ryXYoculdBvW3_LNBedSpURpg?e=dN0OTO

At first, a firefox window started with just this bug page. ~230MB VRAM.

Around 00:09, PDF opened. VRAM jumped to ~350MB.

Then I started scrolling the PDF (out of video area) from top to bottom, bottom to top and repeat. VRAM usage keeps going up and up. I stopped the recording and closed firefox completely when it reached 10GB fearing system crash.

Comment 5

[Calixte Denizet (:calixte)]

:riasat, could attach the pdf file ?

Comment 6

[riasat]

Hi.

Unfortunately, I can not share the file publicly. How do I provide a private file only for Mozilla employee? Send a private email?

In the meantime, I will try to repro with another PDF if possible.

Comment 7

[Wayne Mery (:wsmwk)]

(In reply to riasat from comment #6)

Unfortunately, I can not share the file publicly. How do I provide a private file only for Mozilla employee? Send a private email?

Can you still reproduce? If so, you could email it to the triage owner, bdahl, identified at the top of the bug page.

Comment 8

[riasat]

The PDF was already sent to cdenizet!

Comment 9

[riasat]

I forwarded that email to bdahl. Thanks.