959572968d
This patch enable clients of core's TRACE service to obtain the execution times of trace subjects (i.e., threads). The execution time is delivered as part of the 'Subject_info' structure. Right now, the feature is available solely on NOVA. On all other base platforms, the returned execution times are 0. Issue #813
288 lines
8.7 KiB
C++
288 lines
8.7 KiB
C++
/*
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* \brief Core-specific instance of the CPU session/thread interfaces
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* \author Christian Helmuth
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* \date 2006-07-17
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*/
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/*
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* Copyright (C) 2006-2013 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#ifndef _CORE__INCLUDE__CPU_SESSION_COMPONENT_H_
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#define _CORE__INCLUDE__CPU_SESSION_COMPONENT_H_
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/* Genode includes */
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#include <util/list.h>
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#include <base/allocator_guard.h>
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#include <base/lock.h>
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#include <base/pager.h>
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#include <base/rpc_server.h>
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#include <cpu_session/cpu_session.h>
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/* core includes */
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#include <cpu_thread_allocator.h>
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#include <platform_thread.h>
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#include <trace/control_area.h>
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#include <trace/source_registry.h>
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namespace Genode {
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/**
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* RPC interface of CPU thread
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*
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* We make 'Cpu_thread' a RPC object only to be able to lookup CPU threads
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* from thread capabilities supplied as arguments to CPU-session functions.
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* A CPU thread does not provide an actual RPC interface.
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*/
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struct Cpu_thread
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{
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GENODE_RPC_INTERFACE();
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};
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class Cpu_thread_component : public Rpc_object<Cpu_thread>,
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public List<Cpu_thread_component>::Element,
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public Trace::Source::Info_accessor
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{
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public:
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typedef Trace::Session_label Session_label;
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typedef Trace::Thread_name Thread_name;
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private:
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size_t const _weight;
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Session_label const _session_label;
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Thread_name const _name;
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Platform_thread _platform_thread;
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bool _bound; /* pd binding flag */
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Signal_context_capability _sigh; /* exception handler */
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unsigned const _trace_control_index;
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Trace::Source _trace_source;
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public:
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/**
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* Constructor
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*
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* \param weight weighting regarding the CPU session quota
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* \param quota initial quota counter-value of the weight
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* \param labal label of the threads session
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* \param name name for the thread
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* \param priority scheduling priority
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* \param utcb user-local UTCB base
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* \param sigh initial exception handler
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*/
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Cpu_thread_component(size_t const weight,
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size_t const quota,
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Session_label const &label,
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Thread_name const &name,
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unsigned priority, addr_t utcb,
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Signal_context_capability sigh,
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unsigned trace_control_index,
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Trace::Control &trace_control)
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:
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_weight(weight),
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_session_label(label), _name(name),
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_platform_thread(quota, name.string(), priority, utcb),
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_bound(false), _sigh(sigh),
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_trace_control_index(trace_control_index),
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_trace_source(*this, trace_control)
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{
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update_exception_sigh();
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}
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/********************************************
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** Trace::Source::Info_accessor interface **
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********************************************/
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Trace::Source::Info trace_source_info() const
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{
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return { _session_label, _name,
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_platform_thread.execution_time(),
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_platform_thread.affinity() };
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}
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/************************
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** Accessor functions **
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************************/
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Platform_thread *platform_thread() { return &_platform_thread; }
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bool bound() const { return _bound; }
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void bound(bool b) { _bound = b; }
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Trace::Source *trace_source() { return &_trace_source; }
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size_t weight() const { return _weight; }
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void sigh(Signal_context_capability sigh)
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{
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_sigh = sigh;
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update_exception_sigh();
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}
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/**
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* Propagate exception handler to platform thread
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*/
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void update_exception_sigh();
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/**
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* Return index within the CPU-session's trace control area
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*/
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unsigned trace_control_index() const { return _trace_control_index; }
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};
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class Cpu_session_component : public Rpc_object<Cpu_session>,
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public List<Cpu_session_component>::Element
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{
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public:
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typedef Cpu_thread_component::Session_label Session_label;
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private:
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Session_label _label;
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Rpc_entrypoint * const _session_ep;
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Rpc_entrypoint *_thread_ep;
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Pager_entrypoint *_pager_ep;
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Allocator_guard _md_alloc; /* guarded meta-data allocator */
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Cpu_thread_allocator _thread_alloc; /* meta-data allocator */
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Lock _thread_alloc_lock; /* protect allocator access */
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List<Cpu_thread_component> _thread_list;
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Lock _thread_list_lock; /* protect thread list */
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unsigned _priority; /* priority of threads
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created with this
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session */
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Affinity::Location _location; /* CPU affinity of this
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session */
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Trace::Source_registry &_trace_sources;
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Trace::Control_area _trace_control_area;
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/*
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* Members for quota accounting
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*/
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size_t _weight;
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size_t _quota;
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Cpu_session_component * _ref;
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List<Cpu_session_component> _ref_members;
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Lock _ref_members_lock;
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/*
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* Utilities for quota accounting
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*/
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void _incr_weight(size_t const weight);
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void _decr_weight(size_t const weight);
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size_t _weight_to_quota(size_t const weight) const;
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void _decr_quota(size_t const quota);
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void _incr_quota(size_t const quota);
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void _update_thread_quota(Cpu_thread_component *) const;
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void _update_each_thread_quota();
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void _transfer_quota(Cpu_session_component * const dst,
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size_t const quota);
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void _insert_ref_member(Cpu_session_component * const s)
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{
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Lock::Guard lock_guard(_ref_members_lock);
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_ref_members.insert(s);
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s->_ref = this;
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}
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void _unsync_remove_ref_member(Cpu_session_component * const s)
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{
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s->_ref = 0;
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_ref_members.remove(s);
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}
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void _remove_ref_member(Cpu_session_component * const s)
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{
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Lock::Guard lock_guard(_ref_members_lock);
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_unsync_remove_ref_member(s);
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}
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void _deinit_ref_account();
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void _deinit_threads();
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/**
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* Exception handler that will be invoked unless overridden by a
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* call of 'Cpu_session::exception_handler'.
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*/
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Signal_context_capability _default_exception_handler;
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/**
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* Raw thread-killing functionality
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*
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* This function is called from the 'kill_thread' function and
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* the destructor. Each these functions grab the list lock
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* by themselves and call this function to perform the actual
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* killing.
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*/
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void _unsynchronized_kill_thread(Cpu_thread_component *thread);
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public:
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/**
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* Constructor
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*/
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Cpu_session_component(Rpc_entrypoint *session_ep,
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Rpc_entrypoint *thread_ep,
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Pager_entrypoint *pager_ep,
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Allocator *md_alloc,
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Trace::Source_registry &trace_sources,
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const char *args, Affinity const &affinity,
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size_t quota);
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/**
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* Destructor
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*/
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~Cpu_session_component();
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/**
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* Register quota donation at allocator guard
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*/
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void upgrade_ram_quota(size_t ram_quota) { _md_alloc.upgrade(ram_quota); }
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/***************************
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** CPU session interface **
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***************************/
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Thread_capability create_thread(size_t, Name const &, addr_t);
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Ram_dataspace_capability utcb(Thread_capability thread);
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void kill_thread(Thread_capability);
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int set_pager(Thread_capability, Pager_capability);
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int start(Thread_capability, addr_t, addr_t);
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void pause(Thread_capability thread_cap);
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void resume(Thread_capability thread_cap);
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void cancel_blocking(Thread_capability);
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int name(Thread_capability, char *, size_t);
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Thread_state state(Thread_capability);
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void state(Thread_capability, Thread_state const &);
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void exception_handler(Thread_capability, Signal_context_capability);
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Affinity::Space affinity_space() const;
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void affinity(Thread_capability, Affinity::Location);
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Dataspace_capability trace_control();
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unsigned trace_control_index(Thread_capability);
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Dataspace_capability trace_buffer(Thread_capability);
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Dataspace_capability trace_policy(Thread_capability);
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int ref_account(Cpu_session_capability c);
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int transfer_quota(Cpu_session_capability, size_t);
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Quota quota() override;
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};
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}
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#endif /* _CORE__INCLUDE__CPU_SESSION_COMPONENT_H_ */
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