On Sun, Feb 22, 2015 at 06:12:59PM -0800, Nicholas Nethercote wrote:
> Hi,
> 
> I just landed the patch from
> https://bugzilla.mozilla.org/show_bug.cgi?id=1134030 which adds a new
> memory reporter for the Windows address space. Sample output:
> 
> > 2,147,418,112 B (100.0%) -- address-space
> > +--1,662,676,992 B (77.43%) -- free [229]
> > +----299,868,160 B (13.96%) -- commit
> > |    +--142,098,432 B (06.62%) -- image
> > |    |  +---94,035,968 B (04.38%) -- execute-read [107]
> > |    |  +---44,826,624 B (02.09%) -- readonly [245]
> > |    |  +----1,736,704 B (00.08%) -- writecopy [62]
> > |    |  +----1,499,136 B (00.07%) -- readwrite [151]
> > |    +--127,987,712 B (05.96%) -- private
> > |    |  +--122,867,712 B (05.72%) -- readwrite [224]
> > |    |  +----2,977,792 B (00.14%) -- readwrite (stack) [128]
> > |    |  +----1,310,720 B (00.06%) -- readwrite+guard [128]
> > |    |  +------729,088 B (00.03%) -- execute-readwrite [13]
> > |    |  +-------53,248 B (00.00%) -- execute-read [11]
> > |    |  +-------49,152 B (00.00%) -- readonly [12]
> > |    +---29,782,016 B (01.39%) -- mapped
> > |        +--18,513,920 B (00.86%) -- readwrite [31]
> > |        +--11,268,096 B (00.52%) -- readonly [25]
> > +----184,872,960 B (08.61%) -- reserved
> >      +--161,124,352 B (07.50%) -- private [177]
> >      +---23,474,176 B (01.09%) -- mapped [5]
> >      +------274,432 B (00.01%) -- image [6]
> 
> The numbers in square brackets indicate how many distinct memory
> regions had each particular set of characteristics.
> 
> We've had increasing numbers of cases lately on Windows where memory
> usage goes out of control but the existing memory reporters (e.g. the
> "explicit" tree in about:memory) doesn't show anything. This is
> because the memory usage is related to gfx and/or video playing and so
> comes from the graphics driver or something similar. This new reporter
> is an attempt to get some insight into such cases, though it's still
> fairly crude. If anybody else has any ideas on additional measurements
> that could prove helpful for these kinds of cases, please let me know.
> Thank you.

Note that bug 1134565 and related bugs I'm going to file soon are
possibly related too.

Mike
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