View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0001512 | libmicrohttpd | internal event loop | public | 2009-11-11 08:15 | 2010-01-28 21:48 |
| Reporter | crusader | Assigned To | Christian Grothoff | ||
| Priority | immediate | Severity | major | Reproducibility | always |
| Status | closed | Resolution | fixed | ||
| Product Version | Git master | ||||
| Summary | 0001512: If connection is not closed, CPU is at 100% | ||||
| Description | If the client doesn't close the connection explicit the CPU runs at 100 percent. If there is i.e. 4 requests, quad processors can reach 400%! I think this makes the internal select to get into an infinite while loop. | ||||
| Additional Information | You can reproduce it with libcurl by sending a request and after not closing the connection by calling curl_easy_cleanup, but put a getchar() or something to block the client. | ||||
| Tags | No tags attached. | ||||
| Attached Files | |||||
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Can you provide a simple testcase (like a modification of one of those that we have in testcurl/)? |
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Also, which version are you using? |
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A VERY(!!) simple testcase uploaded. Compile then start. Before hitting any key, my processor runs at 100%. I don't know the version I am running, but the revision number is 9312. |
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Fixed in SVN 9555. Issue was that the code (after some recent refactoring???) failed to check for the special timeout value '0' (for infinity) and instead went select-crazy with timeout 0. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2009-11-11 08:15 | crusader | New Issue | |
| 2009-11-15 14:29 | Christian Grothoff | Note Added: 0003890 | |
| 2009-11-15 14:29 | Christian Grothoff | Status | new => feedback |
| 2009-11-15 14:30 | Christian Grothoff | Note Added: 0003891 | |
| 2009-11-15 14:37 | Christian Grothoff | Assigned To | => Christian Grothoff |
| 2009-11-16 01:46 | crusader | File Added: mhdtest.tar.gz | |
| 2009-11-16 01:49 | crusader | Note Added: 0003911 | |
| 2009-11-16 05:52 | Christian Grothoff | Status | feedback => assigned |
| 2009-11-16 05:58 | Christian Grothoff | Priority | normal => immediate |
| 2009-11-16 06:35 | Christian Grothoff | Status | assigned => resolved |
| 2009-11-16 06:35 | Christian Grothoff | Resolution | open => fixed |
| 2009-11-16 06:35 | Christian Grothoff | Note Added: 0003915 | |
| 2010-01-28 21:48 | Christian Grothoff | Status | resolved => closed |
| 2013-05-06 12:53 | Christian Grothoff | Category | internal select => libmicrohttpd internal select |
| 2024-01-21 13:24 | Christian Grothoff | Category | libmicrohttpd internal select => internal event loop |
