View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0032006 | Open CASCADE | OCCT:Foundation Classes | public | 2020-12-17 22:25 | 2022-10-24 10:40 |
| Reporter | kgv | Assigned To | abv | ||
| Priority | normal | Severity | minor | ||
| Status | new | Resolution | open | ||
| Product Version | 6.6.0 | ||||
| Target Version | 7.8.0 | ||||
| Summary | 0032006: Foundation Classes - OSD_MemInfo returns negative heap value | ||||
| Description | OSD_MemInfo returns negative values for MemHeapUsage counter on Linux when exceeding 2GB:Draw[10]> Private memory: 6011 MiB Working Set: 6054 MiB (peak: 6108 MiB) Virtual memory: 6297 MiB Heap memory: -362 MiB This is because implementation relies on obsolete GLibc-specific function mallinfo() returning 32-bit signed integer numbers. Apart from overflow, mallinfo::uordblks is also known to return counter only for a first arena, while several arenas might be allocated - hence, unreliable for computing overall private allocations. Unfortunately, there is no mallinfo() alternative compatible with 64-bit address space. Instead, there are other functions available like malloc_info() returning memory info in an XML form.
int malloc_info(int options, FILE *stream);
Some applications implement an XML parser (with help of open_memstream() for creation of in-memory file). While this could be slower than mallinfo() call, it seems this is the only way for computing reliable Heap values. | ||||
| Tags | No tags attached. | ||||
| Test case number | |||||
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2020-12-17 22:25 | kgv | New Issue | |
| 2020-12-17 22:25 | kgv | Assigned To | => abv |
| 2020-12-17 22:26 | kgv | Relationship added | child of 0023818 |
| 2020-12-17 22:26 | kgv | Product Version | 7.5.0 => 6.6.0 |
| 2021-04-22 20:41 | kgv | Relationship added | parent of 0032319 |
| 2021-09-09 21:39 | kgv | Target Version | 7.6.0 => 7.7.0 |
| 2022-10-24 10:40 | szy | Target Version | 7.7.0 => 7.8.0 |
