Qt内存使用检查

Question

I am working on legacy application written in Qt 4.8 (C++). After I've made my changes I performed some stress tests. I am worried about their results. These are my findings:

• Without stress tests RssAnon parameter (I'm working on Linux) increase on time
• With stress tests RssAnon increases more rapidly (between 10:05 and 10:20)

I put much effort to avoid dynamic memory use, however I know, that behind the scene Qt use it a lot. I suspect that calling signal/slot mechanism cause this rapid increase. During the tests I pass reference to static object between threads and put it in QAbstractTableModel, based on C-arrays. Of course I call begin/endInsert/RemoveRows on every change.

My question is, is there any more reliable way to check if there is no long term memory problem? I used valgrind, but it doesn't show problems with tested code. Beside that it might not be right tool - everything might be freed on exit, but I want to avoid constant memory increase on runtime. Maybe I should check other parameter from procfs?

Answer 1

In the meantime I used to monitor the memory usage - this is the right tool. I found out that begin/endInsert/RemoveRows methods cause this huge memory consumption in this places:

• QAccessible::queryAccessibleInterace
• QHashData::allocateNode

Regarding the question, the answer is - - and to view results .

To remove this "leak" i had to remove beginInsertRows functions.