1PERF-BUILDID-CACHE(1) perf Manual PERF-BUILDID-CACHE(1)
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6 perf-buildid-cache - Manage build-id cache.
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9 perf buildid-cache <options>
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12 This command manages the build-id cache. It can add, remove, update and
13 purge files to/from the cache. In the future it should as well set
14 upper limits for the space used by the cache, etc.
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17 -a, --add=
18 Add specified file to the cache.
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20 -k, --kcore
21 Add specified kcore file to the cache. For the current host that is
22 /proc/kcore which requires root permissions to read. Be aware that
23 running perf buildid-cache as root may update root’s build-id cache
24 not the user’s. Use the -v option to see where the file is created.
25 Note that the copied file contains only code sections not the whole
26 core image. Note also that files "kallsyms" and "modules" must also
27 be in the same directory and are also copied. All 3 files are
28 created with read permissions for root only. kcore will not be
29 added if there is already a kcore in the cache (with the same
30 build-id) that has the same modules at the same addresses. Use the
31 -v option to see if a copy of kcore is actually made.
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33 -r, --remove=
34 Remove a cached binary which has same build-id of specified file
35 from the cache.
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37 -p, --purge=
38 Purge all cached binaries including older caches which have
39 specified path from the cache.
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41 -M, --missing=
42 List missing build ids in the cache for the specified file.
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44 -u, --update=
45 Update specified file of the cache. Note that this doesn’t remove
46 older entires since those may be still needed for annotating old
47 (or remote) perf.data. Only if there is already a cache which has
48 exactly same build-id, that is replaced by new one. It can be used
49 to update kallsyms and kernel dso to vmlinux in order to support
50 annotation.
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52 -v, --verbose
53 Be more verbose.
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56 perf-record(1), perf-report(1), perf-buildid-list(1)
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60perf 06/18/2019 PERF-BUILDID-CACHE(1)