Bug 200391 – Implement memory monitoring functions for Linux OS

• Status: RESOLVED
• Resolution: FIXED
• Component: New Bugs

[Paulo Matos]

Implement memory monitoring functions for Linux OS

[Paulo Matos]

Created attachment 375409 [details]
Patch

[Paulo Matos]

I wanted to post this for review/discussion. Initially I discussed this with my colleague Caio and he suggested to get this in WTF, except WTF already contains memory management functions for Linux under ./Source/WTF/wtf/linux/MemoryFootprintLinux.cpp but for a completely different purpose.

Initially my reason for implementing this was to get results out of JetStream2 benchmark with memory information when ran with runMode='RAMification'.

I would like to know if this is something that upstream would like to keep in jsc.cpp or move somewhere else (maybe WTF), possibly even merging it with current functionality? Suggestions welcome.

[Carlos Alberto Lopez Perez]

(In reply to Paulo Matos from comment #2)
> I wanted to post this for review/discussion. Initially I discussed this with
> my colleague Caio and he suggested to get this in WTF, except WTF already
> contains memory management functions for Linux under
> ./Source/WTF/wtf/linux/MemoryFootprintLinux.cpp but for a completely
> different purpose.
> 
> Initially my reason for implementing this was to get results out of
> JetStream2 benchmark with memory information when ran with
> runMode='RAMification'.
> 
> I would like to know if this is something that upstream would like to keep
> in jsc.cpp or move somewhere else (maybe WTF), possibly even merging it with
> current functionality? Suggestions welcome.

I think its reasonable to merge this with WTF/wtf/linux/MemoryFootprintLinux.cpp
and share the code.

For example, getCurrentMemoryUsage() can be implemented as returning ProcessMemoryStatus.resident after calling currentProcessMemoryStatus(ProcessMemoryStatus)


Adding resetPeak() to MemoryFootprintLinux.cpp is also reasonable.

[Paulo Matos]

Thanks Carlos for the comments. Sorry for the delay but I have been on holidays.

I will submit a new patch later on with the changes you suggest.

[Paulo Matos]

Created attachment 377965 [details]
Patch

[Zan Dobersek]

Comment on attachment 377965 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=377965&action=review

Besides MemoryFootprintLinux.cpp, similar functionality also exists in bmalloc. At some point it would be nice to bring all this into a single place.

> Source/WTF/wtf/linux/ProcessMemoryFootprint.h:30
> +#if OS(LINUX)
> +#include <sys/resource.h>

Nit: this would deserve an empty line in between.

> Source/WTF/wtf/linux/ProcessMemoryFootprint.h:37
> +
> +    

Nit: and this can do with a single empty line.

> Source/WTF/wtf/linux/ProcessMemoryFootprint.h:46
> +        return { ps.resident, static_cast<uint64_t>(ru.ru_maxrss)*1024 };

Nit: spaces around the multiplication operand.

[Paulo Matos]

Created attachment 379236 [details]
Patch

[EWS]

Comment on attachment 379236 [details]
Patch

Rejecting attachment 379236 [details] from commit-queue.

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[WebKit Commit Bot]

The commit-queue encountered the following flaky tests while processing attachment 379236 [details]:

imported/w3c/web-platform-tests/websockets/bufferedAmount-unchanged-by-sync-xhr.any.worker.html bug 202003 (author: [e-mail])
The commit-queue is continuing to process your patch.

[WebKit Commit Bot]

The commit-queue encountered the following flaky tests while processing attachment 379236 [details]:

fetch/fetch-worker-crash.html bug 187257 (author: [e-mail])
The commit-queue is continuing to process your patch.

[WebKit Commit Bot]

Comment on attachment 379236 [details]
Patch

Clearing flags on attachment: 379236

Committed r250129: <https://trac.webkit.org/changeset/250129>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Radar WebKit Bug Importer]

<rdar://problem/55559829>