1 perf-buildid-cache(1) 1 perf-buildid-cache(1)
2 ===================== 2 =====================
3 3
4 NAME 4 NAME
5 ---- 5 ----
6 perf-buildid-cache - Manage build-id cache. 6 perf-buildid-cache - Manage build-id cache.
7 7
8 SYNOPSIS 8 SYNOPSIS
9 -------- 9 --------
10 [verse] 10 [verse]
11 'perf buildid-cache <options>' 11 'perf buildid-cache <options>'
12 12
13 DESCRIPTION 13 DESCRIPTION
14 ----------- 14 -----------
15 This command manages the build-id cache. It ca 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 shou 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. 17 the space used by the cache, etc.
18 This also scans the target binary for SDT (Sta 18 This also scans the target binary for SDT (Statically Defined Tracing) and
19 record it along with the buildid-cache, which 19 record it along with the buildid-cache, which will be used by perf-probe.
20 For more details, see linkperf:perf-probe[1]. 20 For more details, see linkperf:perf-probe[1].
21 21
22 OPTIONS 22 OPTIONS
23 ------- 23 -------
24 -a:: 24 -a::
25 --add=:: 25 --add=::
26 Add specified file to the cache. 26 Add specified file to the cache.
27 -f:: 27 -f::
28 --force:: 28 --force::
29 Don't complain, do it. 29 Don't complain, do it.
30 -k:: 30 -k::
31 --kcore:: 31 --kcore::
32 Add specified kcore file to the cache. 32 Add specified kcore file to the cache. For the current host that is
33 /proc/kcore which requires root permis 33 /proc/kcore which requires root permissions to read. Be aware that
34 running 'perf buildid-cache' as root m 34 running 'perf buildid-cache' as root may update root's build-id cache
35 not the user's. Use the -v option to s 35 not the user's. Use the -v option to see where the file is created.
36 Note that the copied file contains onl 36 Note that the copied file contains only code sections not the whole core
37 image. Note also that files "kallsyms" 37 image. Note also that files "kallsyms" and "modules" must also be in the
38 same directory and are also copied. A 38 same directory and are also copied. All 3 files are created with read
39 permissions for root only. kcore will 39 permissions for root only. kcore will not be added if there is already a
40 kcore in the cache (with the same buil 40 kcore in the cache (with the same build-id) that has the same modules at
41 the same addresses. Use the -v option 41 the same addresses. Use the -v option to see if a copy of kcore is
42 actually made. 42 actually made.
43 -r:: 43 -r::
44 --remove=:: 44 --remove=::
45 Remove a cached binary which has same 45 Remove a cached binary which has same build-id of specified file
46 from the cache. 46 from the cache.
47 -p:: 47 -p::
48 --purge=:: 48 --purge=::
49 Purge all cached binaries including ol 49 Purge all cached binaries including older caches which have specified
50 path from the cache. 50 path from the cache.
51 -P:: 51 -P::
52 --purge-all:: 52 --purge-all::
53 Purge all cached binaries. This will f 53 Purge all cached binaries. This will flush out entire cache.
54 -M:: 54 -M::
55 --missing=:: 55 --missing=::
56 List missing build ids in the cache fo 56 List missing build ids in the cache for the specified file.
57 -u:: 57 -u::
58 --update=:: 58 --update=::
59 Update specified file of the cache. No 59 Update specified file of the cache. Note that this doesn't remove
60 older entries since those may be still !! 60 older entires since those may be still needed for annotating old
61 (or remote) perf.data. Only if there i 61 (or remote) perf.data. Only if there is already a cache which has
62 exactly same build-id, that is replace 62 exactly same build-id, that is replaced by new one. It can be used
63 to update kallsyms and kernel dso to v 63 to update kallsyms and kernel dso to vmlinux in order to support
64 annotation. 64 annotation.
65 -l:: 65 -l::
66 --list:: 66 --list::
67 List all valid binaries from cache. 67 List all valid binaries from cache.
68 -v:: 68 -v::
69 --verbose:: 69 --verbose::
70 Be more verbose. 70 Be more verbose.
71 71
72 --target-ns=PID: 72 --target-ns=PID:
73 Obtain mount namespace information fro 73 Obtain mount namespace information from the target pid. This is
74 used when creating a uprobe for a proc 74 used when creating a uprobe for a process that resides in a
75 different mount namespace from the per 75 different mount namespace from the perf(1) utility.
76 76
77 --debuginfod[=URLs]:: !! 77 --debuginfod=URLs::
78 Specify debuginfod URL to be used when 78 Specify debuginfod URL to be used when retrieving perf.data binaries,
79 it follows the same syntax as the DEBU 79 it follows the same syntax as the DEBUGINFOD_URLS variable, like:
80 80
81 buildid-cache.debuginfod=http://192. 81 buildid-cache.debuginfod=http://192.168.122.174:8002
82 <<
83 If the URLs is not specified, the valu <<
84 system environment variable is used. <<
85 82
86 SEE ALSO 83 SEE ALSO
87 -------- 84 --------
88 linkperf:perf-record[1], linkperf:perf-report[ 85 linkperf:perf-record[1], linkperf:perf-report[1], linkperf:perf-buildid-list[1]
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