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perf script: Fix missing guest option documentation

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The 'perf script' documentation is missing several options relating to
guests.  Add them.

Fixes: 15a108af1a ("perf script: Allow specifying the files to process guest samples")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20220811170411.84154-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2022-08-11 20:04:09 +03:00 committed by Arnaldo Carvalho de Melo
parent ade1d0307b
commit 696d0a4cb8
1 changed files with 23 additions and 0 deletions
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23
tools/perf/Documentation/perf-script.txt
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@ -487,6 +487,29 @@ include::itrace.txt[]
For itrace only show specified functions and their callees for
itrace. Multiple functions can be separated by comma.
--guestmount=<path>::
Guest OS root file system mount directory. Users mount guest OS
root directories under <path> by a specific filesystem access method,
typically, sshfs.
For example, start 2 guest OS, one's pid is 8888 and the other's is 9999:
[verse]
$ mkdir \~/guestmount
$ cd \~/guestmount
$ sshfs -o allow_other,direct_io -p 5551 localhost:/ 8888/
$ sshfs -o allow_other,direct_io -p 5552 localhost:/ 9999/
$ perf script --guestmount=~/guestmount
--guestkallsyms=<path>::
Guest OS /proc/kallsyms file copy. perf reads it to get guest
kernel symbols. Users copy it out from guest OS.
--guestmodules=<path>::
Guest OS /proc/modules file copy. perf reads it to get guest
kernel module information. Users copy it out from guest OS.
--guestvmlinux=<path>::
Guest OS kernel vmlinux.
--switch-on EVENT_NAME::
Only consider events after this event is found.