Address Kbytes RSS Dirty Mode Mapping
000055f4b738b000 12 0 0 r---- a.out
000055f4b738e000 12 4 0 r-x-- a.out
000055f4b7391000 4 0 0 r---- a.out
000055f4b7393000 4 0 0 r---- a.out
000055f4b7394000 4 0 0 rw--- a.out
000055f4b8abd000 132 4 0 rw--- [ anon ]
00007f60497c3000 2740 924 424 rw--- [ anon ]
00007f6049a70000 52 52 0 r---- libm-2.31.so
00007f6049a7d000 668 256 0 r-x-- libm-2.31.so
00007f6049b24000 612 0 0 r---- libm-2.31.so
00007f6049bbd000 4 0 0 r---- libm-2.31.so
00007f6049bbe000 4 0 0 rw--- libm-2.31.so
00007f6049bbf000 136 136 0 r---- libc-2.31.so
00007f6049be1000 1504 1084 0 r-x-- libc-2.31.so
00007f6049d59000 312 156 0 r---- libc-2.31.so
00007f6049da7000 16 0 0 r---- libc-2.31.so
00007f6049dab000 8 0 0 rw--- libc-2.31.so
00007f6049dad000 16 0 0 rw--- [ anon ]
00007f6049db1000 12 12 0 r---- libgcc_s.so.1
00007f6049db4000 72 64 0 r-x-- libgcc_s.so.1
00007f6049dc6000 16 16 0 r---- libgcc_s.so.1
00007f6049dca000 4 0 0 r---- libgcc_s.so.1
00007f6049dcb000 4 0 0 rw--- libgcc_s.so.1
00007f6049dcc000 600 596 0 r---- libstdc++.so.6.0.28
00007f6049e62000 964 148 0 r-x-- libstdc++.so.6.0.28
00007f6049f53000 292 56 0 r---- libstdc++.so.6.0.28
00007f6049f9c000 4 0 0 ----- libstdc++.so.6.0.28
00007f6049f9d000 44 0 0 r---- libstdc++.so.6.0.28
00007f6049fa8000 12 0 0 rw--- libstdc++.so.6.0.28
00007f6049fab000 20 0 0 rw--- [ anon ]
00007f6049fc4000 4 4 0 r---- ld-2.31.so
00007f6049fc5000 140 140 0 r-x-- ld-2.31.so
00007f6049fe8000 32 32 0 r---- ld-2.31.so
00007f6049ff1000 4 0 0 r---- ld-2.31.so
00007f6049ff2000 4 0 0 rw--- ld-2.31.so
00007f6049ff3000 4 0 0 rw--- [ anon ]
00007ffc7738d000 132 8 4 rw--- [ stack ]
00007ffc773dc000 12 0 0 r---- [ anon ]
00007ffc773df000 4 4 0 r-x-- [ anon ]
ffffffffff600000 4 0 0 --x-- [ anon ]
---------------- ------- ------- -------
total kB 8624 3696 428
I have a C++ program that uses a bunch of libraries (vector,fstream,algorithm etc.).
The above shows the result of pmap -x on my program. For reasons I shall not go into, I would like to "lock" the shared libraries into physical memory, so that if there is heavy memory pressure, the shared libraries will remain locked in physical memory. Only the anonymous pages should get swapped out to disk if there is heavy memory pressure.
Is this the default behavior of Linux? If not, how can this be done programmatically from the application? I'm using Linux Mint 20.1 with kernel version 5.4.0-139-generic.
Also, I should note that I can use mlock to lock anonymous pages, but I'm not sure how it would be used to lock shared libraries.
