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1f4f119b1e
This patch mirrors the accounting and trading scheme that Genode employs
for physical memory to the accounting of capability allocations.
Capability quotas must now be explicitly assigned to subsystems by
specifying a 'caps=<amount>' attribute to init's start nodes.
Analogously to RAM quotas, cap quotas can be traded between clients and
servers as part of the session protocol. The capability budget of each
component is maintained by the component's corresponding PD session at
core.
At the current stage, the accounting is applied to RPC capabilities,
signal-context capabilities, and dataspace capabilities. Capabilities
that are dynamically allocated via core's CPU and TRACE service are not
yet covered. Also, the capabilities allocated by resource multiplexers
outside of core (like nitpicker) must be accounted by the respective
servers, which is not covered yet.
If a component runs out of capabilities, core's PD service prints a
warning to the log. To observe the consumption of capabilities per
component in detail, the PD service is equipped with a diagnostic
mode, which can be enabled via the 'diag' attribute in the target
node of init's routing rules. E.g., the following route enables the
diagnostic mode for the PD session of the "timer" component:
<default-route>
<service name="PD" unscoped_label="timer">
<parent diag="yes"/>
</service>
...
</default-route>
For subsystems based on a sub-init instance, init can be configured
to report the capability-quota information of its subsystems by
adding the attribute 'child_caps="yes"' to init's '<report>'
config node. Init's own capability quota can be reported by adding
the attribute 'init_caps="yes"'.
Fixes #2398
75 lines
2.0 KiB
C++
75 lines
2.0 KiB
C++
/*
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* \brief Report configuration
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* \author Norman Feske
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* \date 2017-01-16
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*/
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/*
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* Copyright (C) 2017 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 Affero General Public License version 3.
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*/
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#ifndef _SRC__INIT__REPORT_H_
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#define _SRC__INIT__REPORT_H_
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#include <util/noncopyable.h>
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#include <util/xml_node.h>
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namespace Init {
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struct Report_update_trigger;
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struct Report_detail;
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}
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class Init::Report_detail : Genode::Noncopyable
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{
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private:
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bool _children = false;
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bool _ids = false;
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bool _requested = false;
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bool _provided = false;
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bool _session_args = false;
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bool _child_ram = false;
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bool _child_caps = false;
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bool _init_ram = false;
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bool _init_caps = false;
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public:
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Report_detail() { }
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Report_detail(Genode::Xml_node report)
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{
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_children = true;
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_ids = report.attribute_value("ids", false);
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_requested = report.attribute_value("requested", false);
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_provided = report.attribute_value("provided", false);
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_session_args = report.attribute_value("session_args", false);
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_child_ram = report.attribute_value("child_ram", false);
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_child_caps = report.attribute_value("child_caps", false);
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_init_ram = report.attribute_value("init_ram", false);
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_init_caps = report.attribute_value("init_caps", false);
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}
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bool children() const { return _children; }
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bool ids() const { return _ids; }
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bool requested() const { return _requested; }
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bool provided() const { return _provided; }
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bool session_args() const { return _session_args; }
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bool child_ram() const { return _child_ram; }
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bool child_caps() const { return _child_caps; }
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bool init_ram() const { return _init_ram; }
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bool init_caps() const { return _init_caps; }
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};
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struct Init::Report_update_trigger
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{
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virtual void trigger_report_update() = 0;
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};
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#endif /* _SRC__INIT__REPORT_H_ */
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