Commit Graph

66 Commits

Author SHA1 Message Date
Paolo Bonzini 025533f6ee vmxcap: update for September 2016 SDM
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-03 16:40:02 +01:00
Paolo Bonzini c3e31eaa21 vmxcap: port to Python 3
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-03 16:40:02 +01:00
Eduardo Habkost 349cb2fbfd vmxcap: Add TSC scaling bit
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <1472181025-10889-3-git-send-email-ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-09-13 19:08:46 +02:00
Eduardo Habkost 6a7b47a786 vmxcap: Show raw MSR value
This will be helpful to allow checking of bits that are not in
the 'bits' table yet.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <1472181025-10889-2-git-send-email-ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-09-13 19:08:46 +02:00
Paolo Bonzini 60b412dd18 kvm_stat: Remove
The source has moved to the Linux kernel tree.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-05-29 09:11:10 +02:00
Fam Zheng cf7ea1e60c scripts/kvm/kvm_stat: Fix missing right parantheses and ".format(...)"
They seem to have snuck in when applying Janosch Frank
<frankja@linux.vnet.ibm.com>'s previous patch.

Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <1455848416-13177-1-git-send-email-famz@redhat.com>
Reviewed-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Tested-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-22 18:40:22 +01:00
Janosch Frank e3dd68df52 scripts/kvm/kvm_stat: Fix tracefs access checking
On kernels build without CONFIG_TRACING kvm_stat will bail out even
when traces are not used. This is not very helpful, especially if the
user can't install a new kernel. Instead, we should warn the user and
fall back to debugfs statistics.

These changes check if trace statistics were selected without kernel
support, warn with a small timeout, set the debugfs statistics option
to True and the tracefs one to False.

Fixes: 7aa4ee5 ('scripts/kvm/kvm_stat: Improve debugfs access checking')
Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1454485291-43849-2-git-send-email-frankja@linux.vnet.ibm.com>
[Exit if -t is passed explicitly. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-09 15:45:26 +01:00
Janosch Frank a013bd2f7b scripts/kvm/kvm_stat: Add optparse description
Added a description text that explains what the script does and which
requirements have to be met to let it run.

The help formatter class is needed as the default optparse formatter
makes the text unreadable.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-35-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:13 +01:00
Janosch Frank 7f786a9a06 scripts/kvm/kvm_stat: Add interactive filtering
Interactively changing the filter is much more useful than the
drilldown, because it is more versatile.

With this patch, the filter can be changed by pressing 'f' in the text
ui and entering a new filter regex.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-34-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:13 +01:00
Janosch Frank 126b33e619 scripts/kvm/kvm_stat: Fixup filtering
When filtering, the group leader event should not be disabled, as all
other events under it will also be disabled. Also we should make sure
that values from disabled fields will not be displayed.

This also filters the fields from the log and batch output for better
readability.

Also the drilldown update now directly checks for the stats' field
filter and (un)sets drilldown accordingly.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-33-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:13 +01:00
Janosch Frank 1cd55f9dc7 scripts/kvm/kvm_stat: Fix rlimit for unprivileged users
Setting the hard limit as a unprivileged user either returns an error
when it is higher than the current one or irreversibly sets it lower.

Therefore we leave the hardlimit untouched as long as we don't need to
raise it as this needs CAP_SYS_RESOURCE.

This gives admins the possibility to run the script as an unprivileged
user to increase security.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-32-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:13 +01:00
Janosch Frank d8e44802f8 scripts/kvm/kvm_stat: Read event values as u64
The struct read_format, which denotes the returned values on a read
states that the values are u64 and not long long which is used for
struct unpacking.

Therefore the 'q' long long formatter was exchanged with 'Q' which is
the format for u64 data.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-31-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:13 +01:00
Janosch Frank 00842aaca5 scripts/kvm/kvm_stat: Cleanup and pre-init perf_event_attr
All initializations of the ctypes struct that don't need additional
information were moved to its init method. The unneeded
initializations for sample_type and sample_period were removed as they
do not affect the counters that are read.

This improves readability of the setup_event_attribute by halfing its
LOC.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-30-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:13 +01:00
Janosch Frank c887d9a25e scripts/kvm/kvm_stat: Fix output formatting
The key names in log mode were capped to 10 characters which is not
enough for distinguishing between keys. Capping was therefore removed.

In batch mode the spacing between keys and values was too narrow and
therefore had to be extended to 42.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-29-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:13 +01:00
Janosch Frank 8a2a33316c scripts/kvm/kvm_stat: Make tui function a class
The tui function itself had a few sub-functions and therefore
basically already was class-like. Making it an actual one with proper
methods improved readability.

The curses wrapper was dropped in favour of __entry/exit__ methods
that implement the same behaviour.

Also renamed single character variable name, so the name reflects the
content.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-28-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:13 +01:00
Janosch Frank 9c0ab054ed scripts/kvm/kvm_stat: Remove unneeded X86_EXIT_REASONS
The architecture detection method directly accesses vmx and smv exit
reason constants. Therefore we don't need it anymore.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-27-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:13 +01:00
Janosch Frank 068294a1ca scripts/kvm/kvm_stat: Group arch specific data
Using global variables and multiple initialization functions for arch
specific data makes the code hard to read. By grouping them in the
Arch classes we encapsulate and initialize them in one place.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-26-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:13 +01:00
Janosch Frank d895493b7c scripts/kvm/kvm_stat: Cleanup of Event class
Added additional newlines for readability.
Factored out attribute and event setup code into own methods.
Exchanged file() with preferred open().

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-25-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:13 +01:00
Janosch Frank fc9fdeebd5 scripts/kvm/kvm_stat: Cleanup of Groups class
Introduced separating newlines for readability and removed special
treatment/variable of the group leader. Renamed fmt to read_format.

The group leader's file descriptor will not be turned into a file
object anymore, instead os.read is used to read from the descriptor.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-24-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:13 +01:00
Janosch Frank e75a36abb4 scripts/kvm/kvm_stat: Cleanup of Stats class
Converted class definition to new style and renamed improper named
variables.

Introduced property for fields_filter.

Moved member variable declaration to init, so one can see all class
variables when reading the init method.

Completely clear the values dict, as we don't need to keep single values.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-23-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:13 +01:00
Janosch Frank dd0b6a4e10 scripts/kvm/kvm_stat: Encapsulate filters variable
The variable was only used in one class but still was defined
globally. Additionaly the detect_platform routine which prepares the
data that goes into the variable was called on each start of the
script, no matter if the class was needed.

To make the variable local to the TracepointProvider class, a new
function that calls detect_platform and returns the filters was
introduced.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-22-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:13 +01:00
Janosch Frank 357bc1e74f scripts/kvm/kvm_stat: Cleanup cpu list retrieval
Reading /sys/devices/system/cpu/online makes opening the cpu
directories unnecessary and works on more/older systems.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-21-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:13 +01:00
Janosch Frank e06715a363 scripts/kvm/kvm_stat: Cleanup of TracepointProvider
Variables with bad names like f and m were renamed to their full name,
so it is clearer which data they contain.

Unneeded variables were removed and the field generating code was
moved in an own function.

dict.iteritems() was removed as directly iterating over a dictionary
also yields the needed keys.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-20-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:13 +01:00
Janosch Frank a90b87bf25 scripts/kvm/kvm_stat: Introduce properties for providers
As previous commit authors used a mixture of setters/getters and
direct access to class variables consolidating them the python way
improved readability.

Properties allow us to assign a value to a class variable through a
setter without the need to call the setter ourselves.

Reviewed-by: Jason J. Herne <jjherne@linux.vnet.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-19-git-send-email-frankja@linux.vnet.ibm.com>
[prop.setter is new in Python 2.6, which is the earliest supported
 version. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:12 +01:00
Janosch Frank 312bf62b7c scripts/kvm/kvm_stat: Rename _perf_event_open
The underscore in front of the function name does not comply with the
python coding guidelines.

Reviewed-by: Jason J. Herne <jjherne@linux.vnet.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-18-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:12 +01:00
Janosch Frank 3e46a5c272 scripts/kvm/kvm_stat: Make cpu detection a function
The online cpus detection method is in the Stats class but does not
use any class variables.

Moving it out of the class to the platform detection function makes
the Stats class more readable.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-17-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:12 +01:00
Janosch Frank 8d3b5ddc4e scripts/kvm/kvm_stat: Cleanup of platform detection
s390 machines can also be detected via uname -m, i.e. python's
os.uname, no need for more complicated checks.

Calling uname once and saving its value for multiple checks is
perfectly sufficient. We don't expect the machine's architecture to
change when the script is running anyway.

On multi-cpu systems x86_init currently will get called multiple
times, returning makes sure we don't waste cicles on that.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-16-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:12 +01:00
Janosch Frank 392a7fa3ca scripts/kvm/kvm_stat: Set sensible no. files rlimit
As num cpus * 1000 is NOT a sensible rlimit, we need to calculate a
more accurate rlimit.

The number of open files is directly dependent on the cpu count and on
the number of trace points per cpu. A additional constant works as a
buffer for files that are needed by python or do get opened when the
script runs.

Hence we have:
      cpus * traces + constant

Reviewed-by: Jason J. Herne <jjherne@linux.vnet.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-15-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:12 +01:00
Janosch Frank 400b3cb519 scripts/kvm/kvm_stat: Fixup syscall error reporting
In 2008 a patch was written that introduced ctypes.get_errno() and
set_errno() as official interfaces to the libc errno variable. Using
them we can avoid accessing private libc variables.
The patch was included in python 2.6.

Also we need to raise the right exception, with the right parameters
and a helpful message.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-14-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:12 +01:00
Janosch Frank f4109dba21 scripts/kvm/kvm_stat: Moved DebugfsProvider
When it is next to the TracepointProvider less scrolling is needed to
change related, surrounding code.

Reviewed-by: Jason J. Herne <jjherne@linux.vnet.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-13-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:12 +01:00
Janosch Frank a4b2be204b scripts/kvm/kvm_stat: Rename variables that redefine globals
Filter, id and byte are builtin python modules which should not be
redefined by local variables.

Reviewed-by: Jason J. Herne <jjherne@linux.vnet.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-12-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:12 +01:00
Janosch Frank e02d896e45 scripts/kvm/kvm_stat: Fix spaces around keyword assignments
Keyword assignments should not not have spaces around the equal
character according to PEP8.

Reviewed-by: Jason J. Herne <jjherne@linux.vnet.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-11-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:12 +01:00
Janosch Frank 639ce18310 scripts/kvm/kvm_stat: Introduce main function
The main function should be the main location for initialization and
helps encapsulating variables into a scope. This way they don't have
to be global and might be mistaken for local ones.

As the providers variable is scoped now it can't be accessed from
within the Stats class. Hence, the global access to the variable was
changed to a local one.

Reviewed-by: Jason J. Herne <jjherne@linux.vnet.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-10-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:12 +01:00
Janosch Frank 7aa4ee5a60 scripts/kvm/kvm_stat: Improve debugfs access checking
Access checking with F_OK was replaced with the better readable
os.path.exists().

On Linux exists() returns False when the user doesn't have sufficient
permissions for statting the directory. Therefore the error message
now states that sufficient rights are needed when the check fails.

Also added check for /sys/kernel/debug/tracing/.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-9-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:12 +01:00
Janosch Frank 6fbff649d7 scripts/kvm/kvm_stat: Cleanup of path variables
Paths to debugfs and trace dirs are now specified globally to remove
redundancies in the code.

Reviewed-by: Jason J. Herne <jjherne@linux.vnet.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-8-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:12 +01:00
Janosch Frank a6ad61f987 scripts/kvm/kvm_stat: Invert dictionaries
The exit reasons dictionaries were defined number -> value but later
on were accessed the other way around. Therefore a invert function
inverted them.

Defining them the right way removes the need to invert them and
therefore also speeds up the script's setup process.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-7-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:12 +01:00
Janosch Frank dbedce0ebc scripts/kvm/kvm_stat: Mark globals in functions
Updating globals over the globals().update() method is not the
standard way of changing globals. Marking variables as global and
modifying them the standard way is better readable.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-6-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:12 +01:00
Janosch Frank fff51233b7 scripts/kvm/kvm_stat: Removed unneeded PERF constants
Only two of the constants are actually needed to set up the events, so
the others were removed. All variables that used them were also removed.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-5-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:12 +01:00
Janosch Frank db3e5d9a22 scripts/kvm/kvm_stat: Make constants uppercase
Constants should be uppercase with separating underscores, as
requested in PEP8. This helps identifying them when reading the code.

Reviewed-by: Jason J. Herne <jjherne@linux.vnet.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-4-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:11 +01:00
Janosch Frank 6590045e5d scripts/kvm/kvm_stat: Replaced os.listdir with os.walk
Os.walk gives back lists of directories and files, no need to filter
directories from the list that listdir gives back.

To make it better understandable a wrapper with docstring was
introduced.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-3-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:11 +01:00
Janosch Frank c81ab0ac90 scripts/kvm/kvm_stat: Cleanup of multiple imports
Removed multiple imports of the same module and moved all imports to
the top.

It is not necessary to import a module each time one of its
functions/classes is used.
For readability each import should get its own line.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1452525484-32309-2-git-send-email-frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-26 15:58:11 +01:00
Stefan Hajnoczi 811c572776 kvm_stat: add kvm_stat.1 man page
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Ademar Reis <areis@redhat.com>
Reviewed-by: Wei Huang <wei@redhat.com>
Message-Id: <1425338947-10296-3-git-send-email-stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-03-10 10:49:25 +01:00
Stefan Hajnoczi 9a7dcb711b kvm_stat: add column headers to text UI
The curses user interface shows both the accumulated total and the
current event counts.  Add column headers so it's clear what the numbers
mean.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Ademar Reis <areis@redhat.com>
Reviewed-by: Wei Huang <wei@redhat.com>
Message-Id: <1425338947-10296-2-git-send-email-stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-03-10 10:49:25 +01:00
Wei Huang edecf5eced kvm_stat: Add kvm_exit reasons for aarch64
This patch defines the list of kvm_exit reasons for aarch64. This list is
based on the Exception Class (EC) field of HSR register. With this patch
users can trace the execution of guest VMs better. A sample output from
command "kvm_stat -1 -t" is shown as the following:
<...>
kvm_exit(WATCHPT_HYP)          0         0
kvm_exit(WFI)               9422      9361

NOTE: This patch requires TRACE_EVENT(kvm_exit) to include exit_reason
field in TP_ARGS. A patch to upstream kernel has been submitted.

Signed-off-by: Wei Huang <wei@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-02-11 21:47:51 +01:00
Wei Huang fc116efad0 kvm_stat: Add RESET support for perf event ioctl
While running kvm_stat using tracepoint on ARM64 hardware (e.g. "kvm_stat
-1 -t"), the initial values of some kvm_userspace_exit counters were found
to be very suspecious. For instance the tracing tool showed that S390_TSCH
was called many times on ARM64 machine, which apparently was wrong.

This patch adds RESET ioctl support for perf monitoring. Before calling
ioctl to enable a perf event, this patch resets the counter first. With
this patch, the init counter values become correct on ARM64 hardware.

Example:

==== before patch ====
kvm_userspace_exit(S390_SIEIC)      1426         0
kvm_userspace_exit(S390_TSCH)       339         0

==== after patch ====
kvm_userspace_exit(S390_SIEIC)         0         0
kvm_userspace_exit(S390_TSCH)         0         0

Signed-off-by: Wei Huang <wei@redhat.com>
2015-01-26 12:27:05 +01:00
Wei Huang 874b1cfad5 kvm_stat: Print errno when syscall to perf_event_open() fails
kvm_stat uses syscall() to call perf_event_open(). If this function
call fails, the returned value is -1, which doesn't tell the details
of such failure (i.e. ENOSYS or EINVAL). This patch retrieves errno
and prints it when syscall() fails. The error message will look like
"Exception: perf_event_open failed, errno = 38".

Signed-off-by: Wei Huang <wei@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-26 12:27:05 +01:00
Wei Huang 2c9d535a2e kvm_stat: Update exit reasons to the latest defintion
This patch updates the exit reasons for x86_vmx, x86_svm, and userspace
to the latest definition.

Signed-off-by: Wei Huang <wei@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-26 12:27:04 +01:00
Wei Huang edcbc401f4 kvm_stat: Add aarch64 support
This patch enables aarch64 support for kvm_stat. The platform detection
is based on OS uname.

Signed-off-by: Wei Huang <wei@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-26 12:27:04 +01:00
Michael Ellerman 4725398f93 kvm_stat: Add powerpc support
Add support for powerpc platforms. We use uname -m, which allows us to
detect ppc, ppc64 and ppc64le/el.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-31 16:36:23 +01:00
Michael Ellerman a15d5642a0 kvm_stat: Abstract ioctl numbers
Unfortunately ioctl numbers are platform specific, so abstract them out
of the code so they can be overridden. As it happens x86 and s390 share
the same values, so nothing needs to change yet.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-31 16:35:15 +01:00