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perf-kvm
Langue: en
Version: 10/19/2010 (fedora - 01/12/10)
Section: 1 (Commandes utilisateur)
NAME
perf-kvm - Tool to trace/measure kvm guest osSYNOPSIS
perf kvm [--host] [--guest] [--guestmount=<path> [--guestkallsyms=<path> --guestmodules=<path> | --guestvmlinux=<path>]] {top|record|report|diff|buildid-list} perf kvm [--host] [--guest] [--guestkallsyms=<path> --guestmodules=<path> | --guestvmlinux=<path>] {top|record|report|diff|buildid-list}
DESCRIPTION
There are a couple of variants of perf kvm:
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'perf kvm [options] top <command>' to generates and displays a performance counter profile of guest os in realtime of an arbitrary workload.
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'perf kvm record <command>' to record the performance couinter profile of an arbitrary workload and save it into a perf data file. If both --host and --guest are input, the perf data file name is perf.data.kvm. If there is no --host but --guest, the file name is perf.data.guest. If there is no --guest but --host, the file name is perf.data.host.
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'perf kvm report' to display the performance counter profile information recorded via perf kvm record.
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'perf kvm diff' to displays the performance difference amongst two perf.data files captured via perf record.
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'perf kvm buildid-list' to display the buildids found in a perf data file, so that other tools can be used to fetch packages with matching symbol tables for use by perf report.
OPTIONS
--host=
- Collect host side performance profile.
--guest=
- Collect guest side performance profile.
--guestmount=<path>
- Guest os root file system mount directory. Users mounts guest os root directories under <path> by a specific filesystem access method, typically, sshfs. For example, start 2 guest os. The onecqs pid is 8888 and the othercqs is 9999. #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 kvm --host --guest --guestmount=~/guestmount top
--guestkallsyms=<path>
- Guest os /proc/kallsyms file copy. perf kvm' reads it to get guest kernel symbols. Users copy it out from guest os.
--guestmodules=<path>
- Guest os /proc/modules file copy. perf kvm' reads it to get guest kernel module information. Users copy it out from guest os.
--guestvmlinux=<path>
- Guest os kernel vmlinux.
SEE ALSO
perf-top(1), perf-record(1), perf-report(1), perf-diff(1), perf-buildid-list(1)
Contenus ©2006-2024 Benjamin Poulain
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