6 perf-buildid-cache - Manage build-id cache.
11 'perf buildid-cache <options>'
15 This command manages the build-id cache. It can add, remove, update and purge
16 files to/from the cache. In the future it should as well set upper limits for
17 the space used by the cache, etc.
18 This also scans the target binary for SDT (Statically Defined Tracing) and
19 record it along with the buildid-cache, which will be used by perf-probe.
20 For more details, see linkperf:perf-probe[1].
26 Add specified file to the cache.
29 Don't complain, do it.
32 Add specified kcore file to the cache. For the current host that is
33 /proc/kcore which requires root permissions to read. Be aware that
34 running 'perf buildid-cache' as root may update root's build-id cache
35 not the user's. Use the -v option to see where the file is created.
36 Note that the copied file contains only code sections not the whole core
37 image. Note also that files "kallsyms" and "modules" must also be in the
38 same directory and are also copied. All 3 files are created with read
39 permissions for root only. kcore will not be added if there is already a
40 kcore in the cache (with the same build-id) that has the same modules at
41 the same addresses. Use the -v option to see if a copy of kcore is
45 Remove a cached binary which has same build-id of specified file
49 Purge all cached binaries including older caches which have specified
53 Purge all cached binaries. This will flush out entire cache.
56 List missing build ids in the cache for the specified file.
59 Update specified file of the cache. Note that this doesn't remove
60 older entires since those may be still needed for annotating old
61 (or remote) perf.data. Only if there is already a cache which has
62 exactly same build-id, that is replaced by new one. It can be used
63 to update kallsyms and kernel dso to vmlinux in order to support
67 List all valid binaries from cache.
73 Obtain mount namespace information from the target pid. This is
74 used when creating a uprobe for a process that resides in a
75 different mount namespace from the perf(1) utility.
79 linkperf:perf-record[1], linkperf:perf-report[1], linkperf:perf-buildid-list[1]