1perf-buildid-cache(1) 2===================== 3 4NAME 5---- 6perf-buildid-cache - Manage build-id cache. 7 8SYNOPSIS 9-------- 10[verse] 11'perf buildid-cache <options>' 12 13DESCRIPTION 14----------- 15This command manages the build-id cache. It can add, remove, update and purge 16files to/from the cache. In the future it should as well set upper limits for 17the space used by the cache, etc. 18 19OPTIONS 20------- 21-a:: 22--add=:: 23 Add specified file to the cache. 24-k:: 25--kcore:: 26 Add specified kcore file to the cache. For the current host that is 27 /proc/kcore which requires root permissions to read. Be aware that 28 running 'perf buildid-cache' as root may update root's build-id cache 29 not the user's. Use the -v option to see where the file is created. 30 Note that the copied file contains only code sections not the whole core 31 image. Note also that files "kallsyms" and "modules" must also be in the 32 same directory and are also copied. All 3 files are created with read 33 permissions for root only. kcore will not be added if there is already a 34 kcore in the cache (with the same build-id) that has the same modules at 35 the same addresses. Use the -v option to see if a copy of kcore is 36 actually made. 37-r:: 38--remove=:: 39 Remove a cached binary which has same build-id of specified file 40 from the cache. 41-p:: 42--purge=:: 43 Purge all cached binaries including older caches which have specified 44 path from the cache. 45-M:: 46--missing=:: 47 List missing build ids in the cache for the specified file. 48-u:: 49--update=:: 50 Update specified file of the cache. Note that this doesn't remove 51 older entires since those may be still needed for annotating old 52 (or remote) perf.data. Only if there is already a cache which has 53 exactly same build-id, that is replaced by new one. It can be used 54 to update kallsyms and kernel dso to vmlinux in order to support 55 annotation. 56 57-v:: 58--verbose:: 59 Be more verbose. 60 61SEE ALSO 62-------- 63linkperf:perf-record[1], linkperf:perf-report[1], linkperf:perf-buildid-list[1] 64