1947661 - Add a memory counter for total physical memory

Status: ASSIGNED

(Core :: Gecko Profiler, enhancement, P2)

Description

[Paul Bone [:pbone]]

The memory counter in Firefox tracks memory allocated with malloc() and free(). However bookkeeping, fragmentation and a cache of "dirty memory" all mean that the actual amount of physical memory allocated to firefox is larger, and when freeing memory especially since Bug 1903758 this can "lag behind" the normal memory counter.

I want to add an optional 2nd memory counter to show the total "committed" memory in mozjemalloc. Note that this won't track memory allocated directly by the JS engine for its own heap or some other custom allocators in firefox or other libraries.

Comment 1

[Paul Bone [:pbone]]

The profiler frontend bug for this is: https://github.com/firefox-devtools/profiler/issues/5365