PERF-BUILDID-CACHE(1) perf Manual PERF-BUILDID-CACHE(1)
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
SEE ALSO
perf-record(1), perf-report(1), perf-buildid-list(1)
perf 12/18/2024 PERF-BUILDID-CACHE(1)
Generated by dwww version 1.14 on Thu Jan 23 05:42:52 CET 2025.