Hi,
I think the following issue is memory leak related but
not sure how to
narrow it down. Your help and suggestion would be
helpful.
- Test Environment
- RH Linux 9.0 (lk2.4) with patch 2.4.20-30.9
- Dell 1U server with 2 SCSI disks. The first
one hold OS and utilities, while the 2nd one
(Seagate ST318453LC) is the target iometer
sends I/O to.
- 2GB memory
- Linux 'Hardware Browser' -> 'SCSI devices'
shows "LSI 53c1030, Driver: mptscsih". This
is probably the built-in SCSI HBA but I'm not
100% sure. I can double check if some one
tells me how.
- iometer (v. 2003.12.16) and dynamo (v.
2003.12.16)
- Symptom
run iometer on a different Windows machine, and
dynamo (the iometer client for Linux) on the Dell
server. Use 'top' utility on Linux to trace the
memory usage. Here is what I observed:
Time (min) Used Memory (MB)
0 305
1 461
2 589
3 679
4 787
5 894
6 898
7 973
10 1087
15 1087
20 1087
30 1087
- Question
Can we say there is a memory leak somewhere based on
the above table? If
not, then why the amount of used memory keeps
increasing within a certain
period of time? If so, why the amount of used memory
stops increasing after 10 mins, and how I can trace
which layer or component
causes it?
If I understand right, the following layers/components
are involved in this
I/O test:
- Linux upper-level (sd) driver
- Linux mid-lever driver
- LSI low-level driver mptscsih (if the
built-in SCSI HBA does come from LSI).
- Linux libs, etc.
- iometer
Any suggestion and idea would be appreciated.
Have a nice weekend!
T.
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