[squeak-dev] Serious garbage/storage leak issue with MCInfoProxy

Marcel Taeumel marcel.taeumel at hpi.de
Tue Feb 20 10:26:19 UTC 2018


We have to consider all open projects:

Project allMorphicProjects do: [:project |
   project world allMorphsDo: [:morph |
      morph removeProperty: #dropShadow]].

Yet, there can be hidden morphs. If we want to ignore those, we can stick with only cleaning up top-level morphs, which are usually the system windows:

Project allMorphicProjects do: [:project |
   project world submorphsDo: [:morph |
      morph removeProperty: #dropShadow]].

Best,
Marcel
Am 20.02.2018 10:57:08 schrieb Bob Arning <arning315 at comcast.net>:
Probably good enough might be
World allMorphsDo: [:ea | ea removeProperty: #dropShadow]
takes 0 ms for me


On 2/20/18 2:46 AM, Marcel Taeumel wrote:

Hi Eliot,

sure. Removing the potential drop shadow of all kinds of morphs takes time:

Morph allSubInstancesDo: [:ea | ea removeProperty: #dropShadow].

About 3 seconds here in a quite clean image.

SystemWindow allSubInstancesDo: [:ea | ea removeProperty: #dropShadow].

Works at 100 milliseconds.

What has the biggest effect in your image?

Best,
Marcel
Am 20.02.2018 02:51:06 schrieb Eliot Miranda <eliot.miranda at gmail.com> [mailto:eliot.miranda at gmail.com]:
Hi Marcel,

    I've finally worked out that the space overhead here comes from the dropShadow cache system in Morphs (in otherProperties in MorphExtensions).  Would it be possible to arrange to flush all drop shadows in the current project when:
- exiting a project
- snapshotting
?

On Thu, Jan 18, 2018 at 3:24 PM, Eliot Miranda <eliot.miranda at gmail.com [mailto:eliot.miranda at gmail.com]> wrote:

Hi All,

    I've been experiencing image save slowdowns recently and finally my work image reached 1.%Gb and I thought I better take a look:

Sisyphus.Cog$ ls -lh SpurWork64.* save/SpurWork64-*
-rw-r--r--@ 1 eliot  staff    28M Jan 18 12:47 SpurWork64.changes
-rw-r--r--@ 1 eliot  staff   1.6G Jan 18 12:48 SpurWork64.image
-rw-r--r--@ 1 eliot  staff    28M Jan 18 12:03 save/SpurWork64-2018-01-18.changes
-rw-r--r--@ 1 eliot  staff   1.5G Jan 18 12:03 save/SpurWork64-2018-01-18.image

I ran a space analysis and found that Bitmap and ByteArray were the top two, so I looked for large Bitmaps.  I found three that fit this criterion:


    Bitmap allInstances select: [:bm| bm size >= 1000000 and: [bm ~~ Display bits]]

I inspected the three and did a chase pointers on one of them.  As I did that suddenly
a) the inspector on the Array became empty (still an array but zero elements)
b) the progress bar for Downloading FlexibleVocabularies-who.NN appeared

I interrupted this and did a very cursory stack examination. Some object had not understood isLiteral and from there what looked like an attempt to turn this stub into a real object caused FlexibleVocabularies-who.NN to start to download.

I threw away the debugger, ran the GC and suddenly all my free space was back.  So now on disc I have

Sisyphus.Cog$ ls -lh SpurWork64.* save/SpurWork64-*
-rw-r--r--@ 1 eliot  staff    28M Jan 18 15:17 SpurWork64.changes
-rw-r--r--@ 1 eliot  staff    57M Jan 18 15:17 SpurWork64.image
-rw-r--r--@ 1 eliot  staff    28M Jan 18 12:03 save/SpurWork64-2018-01-18.changes
-rw-r--r--@ 1 eliot  staff   1.5G Jan 18 12:03 save/SpurWork64-2018-01-18.image

What is going on here?  There seems to be a very bad storage leak.  Can we please discuss this?  This doesn't seem like healthy behaviour at all :-)

_,,,^..^,,,_

best, Eliot



--

_,,,^..^,,,_

best, Eliot


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