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. This also scans the target binary for SDT (Statically Defined Tracing) and
       record it along with the buildid-cache, which will be used by perf-probe. For more
       details, see perf-probe(1).

OPTIONS

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

       -f, --force
           Don’t complain, do it.

       -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.

       -P, --purge-all
           Purge all cached binaries. This will flush out entire 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 entries 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.

       -l, --list
           List all valid binaries from cache.

       -v, --verbose
           Be more verbose.

       --target-ns=PID: Obtain mount namespace information from the target pid. This is used when
       creating a uprobe for a process that resides in a different mount namespace from the
       perf(1) utility.

       --debuginfod[=URLs]
           Specify debuginfod URL to be used when retrieving perf.data binaries, it follows the
           same syntax as the DEBUGINFOD_URLS variable, like:

               buildid-cache.debuginfod=http://192.168.122.174:8002

               If the URLs is not specified, the value of DEBUGINFOD_URLS
               system environment variable is used.

SEE ALSO

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