1773682 - Concurrent delazification cause wasteful scheduling.

Status: RESOLVED FIXED

(Core :: JavaScript Engine, enhancement, P1)

Description

[Nicolas B. Pierron [:nbp] {away}]

Concurrent delazification is currently implemented with a single DelazifyTask which is scheduled multiple times. Scheduling the task takes a lot of resources, such as clearing cached allocations, temporarily taking locks, and moving the code & data in the correct caches when the task changes thread.

Replacing this by a model where the DelazifyTask is parsing all selected functions in a single scheduled should dramatically improve latency and efficiency of DelazifyTasks.

Comment 1

[Nicolas B. Pierron [:nbp] {away}]

Attachment: Bug 1773682 - DelazifyTask: Aggregate all delazifications under a single task.

Previously each function to be delazified was scheduled individually. Causing a
ton of overhead around the usage of locks and recycled memory allocations.

This change causes DelazifyTask to delazify each function within a single
schedule of the DelazifyTask, while adding the skeleton for making the
DelazifyTask interruptible in the future.

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/7799edb85c2c
DelazifyTask: Aggregate all delazifications under a single task. r=arai

Comment 3

[Narcis Beleuzu [:NarcisB]]

https://hg.mozilla.org/mozilla-central/rev/7799edb85c2c