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 r

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>

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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: Jano

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>

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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 w

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>

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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-

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>

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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

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>

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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

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>

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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 i

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>

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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 <

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>

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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

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>

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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

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>

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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

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>

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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

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>

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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 v

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>

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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 c

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>

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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 ca

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>

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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.i

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>

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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@li

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>

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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.v

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>

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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 a

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>

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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 su

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>

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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.co

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>

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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.

Defi

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>

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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 st

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>

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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.

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>

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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

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>

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