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| ID | Category | Severity | Reproducibility | Date Submitted | Last Update | ||||
| 0006581 | [Squeak] Morphic | block | random | 07-31-07 14:10 | 04-18-10 21:59 | ||||
| Reporter | al | View Status | public | ||||||
| Assigned To | andreas | ||||||||
| Priority | high | Resolution | fixed | ||||||
| Status | closed | Product Version | |||||||
| Summary | 0006581: Image freezes (background processes like Seaside make no progress) and Squeak hoggs CPU | ||||||||
| Description |
This is the image freezing problem, where connecting with VNC and moving the mouse would bring the image alive again. When being stuck, Squeak hoggs the CPU, memory consumtion is stable. There have been various reports matching the described symptoms, e.g., http://lists.squeakfoundation.org/pipermail/squeak-dev/2006-August/107618.html [^] |
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| Additional Information | For a detailled description and analysis of the problem refer to the Squeak-dev mailing list thread starting with message http://lists.squeakfoundation.org/pipermail/squeak-dev/2007-July/119023.html [^] | ||||||||
| Attached Files |
 FreezeFix.1.cs [^] (1,460 bytes) 07-31-07 14:20 |
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Notes |
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(0010949 - 178 - 178 - 178 - 178 - 178 - 178) al 07-31-07 14:24 |
Attached changeset adds a preference #serverMode, which, when enabled, prevents the problem. In desktop use, the preference is better disabled because of degraded UI performance. |
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(0013421 - 224 - 224 - 224 - 224 - 224 - 224) KenCausey 12-02-09 22:00 |
We are using this now at source.squeak.org where we were having some trouble and at this point it seems to have helped significantly as we have had no noticeable lockups or delays since. It was installed on October 9, 2009. |
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(0013422 - 175 - 175 - 175 - 175 - 175 - 175) KenCausey 12-02-09 22:01 |
Rather than harvested as is, perhaps something can be learned from this to produce a real fix that does not require distinguishing between 'server' and 'UI' or 'client' modes? |
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(0013456 - 290 - 290 - 290 - 290 - 290 - 290) andreas 01-06-10 22:06 |
There's no way to fix the problem differently. The issue is that Seaside runs processes below the UI priority. If the UI takes 100% CPU there are no cycles left to serve the Seaside processes. The fix ensures that at least the UI process can't take 100% CPU by artificially waiting 50msecs. |
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(0013457 - 49 - 49 - 197 - 197 - 197 - 197) andreas 01-06-10 22:06 |
http://source.squeak.org/trunk/Morphic-ar.300.mcz [^] |
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Issue History |
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| Date Modified | Username | Field | Change |
| 07-31-07 14:10 | al | New Issue | |
| 07-31-07 14:10 | al | Status | new => assigned |
| 07-31-07 14:10 | al | Assigned To | => KenCausey |
| 07-31-07 14:20 | al | File Added: FreezeFix.1.cs | |
| 07-31-07 14:24 | al | Note Added: 0010949 | |
| 07-31-07 14:24 | al | Issue Monitored: al | |
| 07-31-07 16:57 | KenCausey | Assigned To | KenCausey => |
| 07-31-07 16:57 | KenCausey | Status | assigned => new |
| 07-31-07 16:57 | KenCausey | Category | Any => Morphic |
| 08-03-07 00:29 | wiz | Relationship added | related to 0004882 |
| 12-02-09 22:00 | KenCausey | Note Added: 0013421 | |
| 12-02-09 22:01 | KenCausey | Note Added: 0013422 | |
| 01-06-10 22:06 | andreas | Note Added: 0013456 | |
| 01-06-10 22:06 | andreas | Status | new => resolved |
| 01-06-10 22:06 | andreas | Resolution | open => fixed |
| 01-06-10 22:06 | andreas | Assigned To | => andreas |
| 01-06-10 22:06 | andreas | Note Added: 0013457 | |
| 04-18-10 21:59 | andreas | Status | resolved => closed |
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