115 lines
2.8 KiB
Python
115 lines
2.8 KiB
Python
# -*- mode: python -*-
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# vim: filetype=python
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#
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# Copyright (C) 2011-2016 Lluís Vilanova <vilanova@ac.upc.edu>
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#
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# This work is licensed under the terms of the GNU GPL, version 2 or later.
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# See the COPYING file in the top-level directory.
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##
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# = Tracing
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##
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##
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# @TraceEventState:
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#
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# State of a tracing event.
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#
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# @unavailable: The event is statically disabled.
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#
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# @disabled: The event is dynamically disabled.
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#
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# @enabled: The event is dynamically enabled.
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#
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# Since: 2.2
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##
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{ 'enum': 'TraceEventState',
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'data': ['unavailable', 'disabled', 'enabled'] }
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##
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# @TraceEventInfo:
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#
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# Information of a tracing event.
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#
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# @name: Event name.
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#
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# @state: Tracing state.
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#
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# @vcpu: Whether this is a per-vCPU event (since 2.7).
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#
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# An event is per-vCPU if it has the "vcpu" property in the
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# "trace-events" files.
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#
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# Since: 2.2
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##
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{ 'struct': 'TraceEventInfo',
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'data': {'name': 'str', 'state': 'TraceEventState', 'vcpu': 'bool'} }
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##
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# @trace-event-get-state:
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#
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# Query the state of events.
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#
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# @name: Event name pattern (case-sensitive glob).
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#
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# @vcpu: The vCPU to query (any by default; since 2.7).
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#
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# Returns: a list of @TraceEventInfo for the matching events
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#
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# An event is returned if:
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#
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# - its name matches the @name pattern, and
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# - if @vcpu is given, the event has the "vcpu" property.
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#
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# Therefore, if @vcpu is given, the operation will only match per-vCPU
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# events, returning their state on the specified vCPU. Special case:
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# if @name is an exact match, @vcpu is given and the event does not
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# have the "vcpu" property, an error is returned.
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#
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# Since: 2.2
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#
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# Example:
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#
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# -> { "execute": "trace-event-get-state",
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# "arguments": { "name": "qemu_memalign" } }
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# <- { "return": [ { "name": "qemu_memalign", "state": "disabled", "vcpu": false } ] }
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##
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{ 'command': 'trace-event-get-state',
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'data': {'name': 'str', '*vcpu': 'int'},
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'returns': ['TraceEventInfo'] }
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##
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# @trace-event-set-state:
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#
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# Set the dynamic tracing state of events.
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#
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# @name: Event name pattern (case-sensitive glob).
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#
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# @enable: Whether to enable tracing.
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#
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# @ignore-unavailable: Do not match unavailable events with @name.
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#
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# @vcpu: The vCPU to act upon (all by default; since 2.7).
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#
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# An event's state is modified if:
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#
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# - its name matches the @name pattern, and
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# - if @vcpu is given, the event has the "vcpu" property.
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#
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# Therefore, if @vcpu is given, the operation will only match per-vCPU
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# events, setting their state on the specified vCPU. Special case: if
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# @name is an exact match, @vcpu is given and the event does not have
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# the "vcpu" property, an error is returned.
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#
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# Since: 2.2
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#
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# Example:
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#
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# -> { "execute": "trace-event-set-state",
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# "arguments": { "name": "qemu_memalign", "enable": true } }
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# <- { "return": {} }
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##
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{ 'command': 'trace-event-set-state',
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'data': {'name': 'str', 'enable': 'bool', '*ignore-unavailable': 'bool',
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'*vcpu': 'int'} }
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