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| author |   Stefan Raspl <raspl@linux.vnet.ibm.com> | 2017-03-10 13:40:07 +0100 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2017-03-29 12:01:28 +0200 |
| commit | 1eaa2f9022d55a8d7249c42def8dc4b0d682e142 (patch) | |
| tree | 1d532a71c099531eb916625c81466c858a559458 /tools/kvm | |
| parent | tools/kvm_stat: reduce perceived idle time on filter updates (diff) | |
| download | linux-dev-1eaa2f9022d55a8d7249c42def8dc4b0d682e142.tar.xz linux-dev-1eaa2f9022d55a8d7249c42def8dc4b0d682e142.zip | |
tools/kvm_stat: document list of interactive commands
Apart from the source code, there does not seem to be a place that documents
the interactive capabilities of kvm_stat yet.
Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Diffstat (limited to 'tools/kvm')
| -rwxr-xr-x | tools/kvm/kvm_stat/kvm_stat | 7 | ||||
| -rw-r--r-- | tools/kvm/kvm_stat/kvm_stat.txt | 16 |
2 files changed, 23 insertions, 0 deletions
diff --git a/tools/kvm/kvm_stat/kvm_stat b/tools/kvm/kvm_stat/kvm_stat index 3e60d93870c0..aca85086be1e 100755 --- a/tools/kvm/kvm_stat/kvm_stat +++ b/tools/kvm/kvm_stat/kvm_stat @@ -1052,6 +1052,13 @@ Requirements: CAP_SYS_ADMIN and perf events are used. - CAP_SYS_RESOURCE if the hard limit is not high enough to allow the large number of files that are possibly opened. + +Interactive Commands: + f filter by regular expression + p filter by PID + q quit + x toggle reporting of stats for individual child trace events +Press any other key to refresh statistics immediately. """ class PlainHelpFormatter(optparse.IndentedHelpFormatter): diff --git a/tools/kvm/kvm_stat/kvm_stat.txt b/tools/kvm/kvm_stat/kvm_stat.txt index b92a153d7115..077bcc7e20dc 100644 --- a/tools/kvm/kvm_stat/kvm_stat.txt +++ b/tools/kvm/kvm_stat/kvm_stat.txt @@ -18,11 +18,27 @@ state transitions such as guest mode entry and exit. This tool is useful for observing guest behavior from the host perspective. Often conclusions about performance or buggy behavior can be drawn from the output. +While running in regular mode, use any of the keys listed in section +'Interactive Commands' below. +Use batch and logging modes for scripting purposes. The set of KVM kernel module trace events may be specific to the kernel version or architecture. It is best to check the KVM kernel module source code for the meaning of events. +INTERACTIVE COMMANDS +-------------------- +[horizontal] +*f*:: filter by regular expression + +*p*:: filter by PID + +*q*:: quit + +*x*:: toggle reporting of stats for child trace events + +Press any other key to refresh statistics immediately. + OPTIONS ------- -1:: |