NAME

       perf-buildid-cache - Manage build-id cache.

SYNOPSIS

       perf buildid-cache <options>

DESCRIPTION

       This command manages the build-id cache. It can add, remove, update and purge files
       to/from the cache. In the future it should as well set upper limits for the space used by
       the cache, etc.

OPTIONS

       -a, --add=
           Add specified file to the cache.

       -k, --kcore
           Add specified kcore file to the cache. For the current host that is /proc/kcore which
           requires root permissions to read. Be aware that running perf buildid-cache as root
           may update root’s build-id cache not the user’s. Use the -v option to see where the
           file is created. Note that the copied file contains only code sections not the whole
           core image. Note also that files "kallsyms" and "modules" must also be in the same
           directory and are also copied. All 3 files are created with read permissions for root
           only. kcore will not be added if there is already a kcore in the cache (with the same
           build-id) that has the same modules at the same addresses. Use the -v option to see if
           a copy of kcore is actually made.

       -r, --remove=
           Remove a cached binary which has same build-id of specified file from the cache.

       -p, --purge=
           Purge all cached binaries including older caches which have specified path from the
           cache.

       -M, --missing=
           List missing build ids in the cache for the specified file.

       -u, --update=
           Update specified file of the cache. Note that this doesn’t remove older entires since
           those may be still needed for annotating old (or remote) perf.data. Only if there is
           already a cache which has exactly same build-id, that is replaced by new one. It can
           be used to update kallsyms and kernel dso to vmlinux in order to support annotation.

       -v, --verbose
           Be more verbose.

SEE ALSO

       perf-record(1), perf-report(1), perf-buildid-list(1)