Awesome

ctfmemusage

Compute and display the memory usage of the CTF data set, the libbsdctf and comparisong to the DWARF data set.

Build

$ ninja

Dependencies

• libbsdctf
• libelf

Usage

• -h print help message
• -l insepct the library storage/memory efficiency
• -d inspect the CTF/DWARF comparison
• -r print ratio
• -s when used in combination with -r will print only the ratio number

Run

Inspect general library implementation and DWARF comparison:

$ ctfmemusage -dlr /boot/kernel/kernel
CTF memory vs. CTF storage
--------------------------
   Memory usage: 6485904 bytes
  Storage usage: 3144954 bytes
          Ratio: 2.062

DWARF storage vs. CTF storage
-----------------------------
  DWARF: 34168436 bytes
    CTF: 3144954 bytes
  Ratio: 10.865

Compute average storage inflation by the library (results may vary depending on your system):

$ find /boot/kernel -name '*.symbols' -exec ctfmemusage -lrs {} \; | awk
‘{+=$1}END{print s/NR}'
2.67788

Author

Daniel Lovasko (lovasko@freebsd.org)