tools/perf/Documentation/perf-buildid-cache.txt

   1 perf-buildid-cache(1)
   2 =====================
   3
   4 NAME
   5 ----
   6 perf-buildid-cache - Manage build-id cache.
   7
   8 SYNOPSIS
   9 --------
  10 [verse]
  11 'perf buildid-cache <options>'
  12
  13 DESCRIPTION
  14 -----------
  15 This command manages the build-id cache. It can add and remove files to/from
  16 the cache. In the future it should as well purge older entries, set upper
  17 limits for the space used by the cache, etc.
  18
  19 OPTIONS
  20 -------
  21 -a::
  22 --add=::
  23         Add specified file to the cache.
  24 -k::
  25 --kcore::
  26         Add specified kcore file to the cache. For the current host that is
  27         /proc/kcore which requires root permissions to read. Be aware that
  28         running 'perf buildid-cache' as root may update root's build-id cache
  29         not the user's. Use the -v option to see where the file is created.
  30         Note that the copied file contains only code sections not the whole core
  31         image. Note also that files "kallsyms" and "modules" must also be in the
  32         same directory and are also copied.  All 3 files are created with read
  33         permissions for root only. kcore will not be added if there is already a
  34         kcore in the cache (with the same build-id) that has the same modules at
  35         the same addresses. Use the -v option to see if a copy of kcore is
  36         actually made.
  37 -r::
  38 --remove=::
  39         Remove specified file from the cache.
  40 -M::
  41 --missing=::
  42         List missing build ids in the cache for the specified file.
  43 -u::
  44 --update::
  45         Update specified file of the cache. It can be used to update kallsyms
  46         kernel dso to vmlinux in order to support annotation.
  47 -v::
  48 --verbose::
  49         Be more verbose.
  50
  51 SEE ALSO
  52 --------
  53 linkperf:perf-record[1], linkperf:perf-report[1], linkperf:perf-buildid-list[1]