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Message-Id: <20240605123710.7396-1-00107082@163.com>
Date: Wed, 5 Jun 2024 20:37:10 +0800
From: David Wang <00107082@....com>
To: kent.overstreet@...ux.dev,
surenb@...gle.com,
keescook@...omium.org
Cc: linux-kernel@...r.kernel.org
Subject: [BUG?] memory allocation profiling: the counters are not non-decreasing.
Hi,
I was playing with this new feature of memory allocation profiling, when I plot the data, grouped by caller's source dir,
I noticed that the counters are not non-decreasing.
If I understand this feature correctly, all counters should be non-decreasing, right?
Or is there some TTL for stale items?
Following is a simpler script demonstrating my sayings
$ for i in {1..100}; do sudo cat /proc/allocinfo | grep " mm\/" | awk '{s+=$2}END{print s}'; sleep 10; done
1194453
1196935
1198957
1199716
1200770
1190795 <--- decrease here
1192702
1193070
1193812
1195069
1196491
...
FYI
David
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