Memory leak in 32 bit but not in 64 bit (linux ubuntu)
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Hi
I have made this daemon, listning to the com port and storing data in a mysql database.
It was developed on my 64 bit ubuntu, copied to and compiled, unmodified, on a 32 bit ubuntu.
On the 64 bit machine I have had the daemon running for more than 48 hours without any memory leak (according to pmap -d).
On the 32 bit machine I have detectable memory leak after less than an hour, and it keeps leaking.
Output from pmap -d just after startup :
@Address Kbytes Mode Offset Device Mapping
08048000 124 r-x-- 0000000000000000 0fc:00000 vejrstationd
08067000 4 r---- 000000000001e000 0fc:00000 vejrstationd
08068000 4 rw--- 000000000001f000 0fc:00000 vejrstationd
097f8000 132 rw--- 0000000000000000 000:00000 [ anon ]
b4400000 132 rw--- 0000000000000000 000:00000 [ anon ]
b4421000 892 ----- 0000000000000000 000:00000 [ anon ]
b4517000 4 ----- 0000000000000000 000:00000 [ anon ]
<truncated>
bfdf6000 132 rw--- 0000000000000000 000:00000 [ stack ]
mapped: 52888K writeable/private: 9376K shared: 0K@Output from pmap -d after about 5 hours :
@Address Kbytes Mode Offset Device Mapping
08048000 124 r-x-- 0000000000000000 0fc:00000 vejrstationd
08067000 4 r---- 000000000001e000 0fc:00000 vejrstationd
08068000 4 rw--- 000000000001f000 0fc:00000 vejrstationd
097f8000 1960 rw--- 0000000000000000 000:00000 [ anon ]
b4400000 132 rw--- 0000000000000000 000:00000 [ anon ]
b4421000 892 ----- 0000000000000000 000:00000 [ anon ]
b4517000 4 ----- 0000000000000000 000:00000 [ anon ]
<truncated>
bfdf6000 132 rw--- 0000000000000000 000:00000 [ stack ]
mapped: 54716K writeable/private: 11204K shared: 0K@Please observer the block at 097f8000, this one just keeps growing !
Any idea why I have this difference between a 32bit and a 64bit machine, and how I find the cause of the leak ?
To the best of my knowledge Qt, Mysql and Ubuntu is the same, except for the number of bits !
Kim
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Hi,
This sounds rather strange indeed. You should bring this question to the interest mailing list, there you'll find Qt's developers/maintainers (this forum is more user oriented)
