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2017-03-29tools/kvm_stat: add '%Total' columnStefan Raspl1-1/+8
Add column '%Total' next to 'Total' for easier comparison of numbers between hosts. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Marc Hartmayer <mhartmay@linux.vnet.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29tools/kvm_stat: add interactive command 'r'Stefan Raspl2-14/+53
Provide an interactive command to reset the tracepoint statistics. Requires some extra work for debugfs, as the counters cannot be reset. On the up side, this offers us the opportunity to have debugfs values reset on startup and whenever a filter is modified, becoming consistent with the tracepoint provider. As a bonus, 'kvmstat -dt' will now provide useful output, instead of mixing values in totally different orders of magnitude. Furthermore, we avoid unnecessary resets when any of the filters is "changed" interactively to the previous value. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Acked-by: Janosch Frank <frankja@linux.vnet.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29tools/kvm_stat: add interactive command 'c'Stefan Raspl2-4/+14
Provide a real simple way to erase any active filter. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Reviewed-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29tools/kvm_stat: add option '--guest'Stefan Raspl2-2/+105
Add a new option '-g'/'--guest' to select a particular process by providing the QEMU guest name. Notes: - The logic to figure out the pid corresponding to the guest name might look scary, but works pretty reliably in practice; in the unlikely event that it returns add'l flukes, it will bail out and hint at using '-p' instead, no harm done. - Mixing '-g' and '-p' is possible, and the final instance specified on the command line is the significant one. This is consistent with current behavior for '-p' which, if specified multiple times, also regards the final instance as the significant one. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Reviewed-by: Janosch Frank <frankja@linux.vnet.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29tools/kvm_stat: remove regex filter on empty inputStefan Raspl1-0/+1
Behavior on empty/0 input for regex and pid filtering was inconsistent, as the former would keep the current filter, while the latter would (naturally) remove any pid filtering. Make things consistent by falling back to the default filter on empty input for the regex filter dialogue. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Reviewed-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29tools/kvm_stat: display regex when set to non-defaultStefan Raspl1-0/+6
If a user defines a regex filter through the interactive command, display the active regex in the header's second line. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Reviewed-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29tools/kvm_stat: print error messages on faulty pid filter inputStefan Raspl1-0/+4
Print helpful messages in case users enter invalid input or invalid pids in the interactive pid filter dialogue. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Reviewed-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29tools/kvm_stat: remove pid filter on empty inputStefan Raspl1-4/+7
Improve consistency in the interactive dialogue for pid filtering by removing any filters on empty input (in addition to entering 0). Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Reviewed-by: Janosch Frank <frankja@linux.vnet.ibm.com> Reviewed-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29tools/kvm_stat: display guest name when using pid filterStefan Raspl1-2/+39
When running kvm_stat with option '-p' to filter per process, display the QEMU guest name next to the pid, if available. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Reviewed-By: Janosch Frank <frankja@linux.vnet.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29tools/kvm_stat: document list of interactive commandsStefan Raspl2-0/+23
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>
2017-03-29tools/kvm_stat: reduce perceived idle time on filter updatesStefan Raspl1-18/+30
Whenever a user adds a filter, we * redraw the header immediately for a snappy response * print a message indicating to the user that we're busy while the noticeable delay induced by updating all of the stats objects takes place * update the statistics ASAP (i.e. after 0.25s instead of 3s) to be consistent with behavior on startup To do so, we split the Tui's refresh() method to allow for drawing header and stats separately, and trigger a header refresh whenever we are about to do something that takes a while - like updating filters. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29tools/kvm_stat: full PEP8 complianceStefan Raspl1-0/+22
Provides all missing empty lines as required for full PEP compliance. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Reviewed-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29tools/kvm_stat: fix trace setup glitch on field updates in TracepointProviderStefan Raspl1-2/+3
Updating the fields of the TracepointProvider does not propagate changes to the tracepoints. This shows when a pid filter is enabled, whereby subsequent extensions of the fields of the Tracepoint provider (e.g. by toggling drilldown) will not modify the tracepoints as required. To reproduce, select a specific process via interactive command 'p', and enable drilldown via 'x' - none of the fields with the braces will appear although they should. The fix will always leave all available fields in the TracepointProvider enabled. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Based-on-text-by: Janosch Frank <frankja@linux.vnet.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29tools/kvm_stat: fix misc glitchesStefan Raspl1-13/+11
Addresses - eliminate extra import - missing variable initialization - type redefinition from int to float - passing of int type argument instead of string - a couple of PEP8-reported indentation/formatting glitches - remove unused variable drilldown in class Tui Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Reviewed-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29tools/kvm_stat: handle SIGINT in log and batch modesStefan Raspl1-11/+17
SIGINT causes ugly unhandled exceptions in log and batch mode, which we prevent by catching the exceptions accordingly. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Reviewed-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29tools/kvm_stat: catch curses exceptions onlyStefan Raspl1-1/+1
The previous version was catching all exceptions, including SIGINT. We only want to catch the curses exceptions here. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Reviewed-by: Janosch Frank <frankja@linux.vnet.ibm.com> Reviewed-by: Sascha Silbe <silbe@linux.vnet.ibm.com> Reviewed-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-03-29tools/kvm_stat: hide cursorStefan Raspl1-0/+7
When running kvm_stat in interactive mode, the cursor appears at the lower left corner, which looks a bit distracting. This patch hides the cursor by turning it invisible. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Reviewed-By: Sascha Silbe <silbe@linux.vnet.ibm.com> Reviewed-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2016-05-25tools: kvm_stat: Add commentsJanosch Frank1-2/+159
A lot of the code works with the perf events about which only sparse documentation was available until 2012. Having that information now, we can clarify what is done in the code. Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-05-25tools: kvm_stat: Introduce pid monitoringJanosch Frank2-22/+167
Having stats for single VMs can help to determine the problem of a VM without the need of running other tools like perf. The tracepoints already allowed pid level monitoring, but kvm_stat didn't have support for it till now. Support for the newly implemented debugfs vm monitoring was also implemented. Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-05-25tools: kvm_stat: Powerpc related fixesHemant Kumar1-0/+2
kvm_stat script is failing to execute on powerpc : # ./kvm_stat Traceback (most recent call last): File "./kvm_stat", line 825, in <module> main() File "./kvm_stat", line 813, in main providers = get_providers(options) File "./kvm_stat", line 778, in get_providers providers.append(TracepointProvider()) File "./kvm_stat", line 416, in __init__ self.filters = get_filters() File "./kvm_stat", line 315, in get_filters if ARCH.exit_reasons: AttributeError: 'ArchPPC' object has no attribute 'exit_reasons' This is because, its trying to access a non-defined attribute. Also, the IOCTL number of RESET is incorrect for powerpc. The correct number has been added. Signed-off-by: Hemant Kumar <hemant@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-05-25tools: Add kvm_stat man pagePaolo Bonzini2-2/+99
Converted from the Texinfo source in QEMU to asciidoc. The a2x incantation was provided by Janosch Frank. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-05-25tools: Add kvm_stat vm monitor scriptJanosch Frank2-0/+830
This tool displays kvm vm exit statistics to ease vm monitoring. It takes its data from the kvm debugfs files or the vm tracepoints and outputs them as a curses ui or simple text. It was moved from qemu, as it is dependent on the kernel whereas qemu works with a large number of kernel versions, some of which may break the script. Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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