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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO | COLOPHON |
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PERF-BUILDID-CACHE(1) perf Manual PERF-BUILDID-CACHE(1)
perf-buildid-cache - Manage build-id cache.
perf buildid-cache <options>
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).
-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
If the URLs is not specified, the value of DEBUGINFOD_URLS
system environment variable is used.
perf-record(1), perf-report(1), perf-buildid-list(1)
This page is part of the perf (Performance analysis tools for
Linux (in Linux source tree)) project. Information about the
project can be found at
⟨https://perf.wiki.kernel.org/index.php/Main_Page⟩. If you have a
bug report for this manual page, send it to
linux-kernel@vger.kernel.org. This page was obtained from the
project's upstream Git repository
⟨http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git⟩
on 2024-06-14. (At that time, the date of the most recent commit
that was found in the repository was 2024-06-13.) If you
discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for
the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original
manual page), send a mail to man-pages@man7.org
perf 2022-01-15 PERF-BUILDID-CACHE(1)
Pages that refer to this page: perf(1), perf-probe(1)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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