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
53 lines
1.6 KiB
C++
53 lines
1.6 KiB
C++
/*
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* \brief NOVA-specific part of the PD session interface
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* \author Norman Feske
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* \date 2016-01-19
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*/
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/*
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* Copyright (C) 2016-2017 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 _INCLUDE__NOVA_NATIVE_PD__NOVA_NATIVE_PD_H_
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#define _INCLUDE__NOVA_NATIVE_PD__NOVA_NATIVE_PD_H_
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#include <base/rpc.h>
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#include <pd_session/pd_session.h>
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namespace Genode { struct Nova_native_pd; }
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struct Genode::Nova_native_pd : Pd_session::Native_pd
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{
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/**
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* Allocate RPC object capability
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*
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* \param ep entry point that will use this capability
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* \param entry server-side instruction pointer of the RPC handler
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* \param mtd NOVA message transfer descriptor
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*
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* \throw Out_of_ram
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* \throw Out_of_caps
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*
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* \return new RPC object capability
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*/
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virtual Native_capability alloc_rpc_cap(Native_capability ep,
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addr_t entry, addr_t mtd) = 0;
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/**
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* Imprint badge into the portal of the specified RPC capability
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*/
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virtual void imprint_rpc_cap(Native_capability cap, unsigned long badge) = 0;
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GENODE_RPC_THROW(Rpc_alloc_rpc_cap, Native_capability, alloc_rpc_cap,
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GENODE_TYPE_LIST(Out_of_ram, Out_of_caps),
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Native_capability, addr_t, addr_t);
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GENODE_RPC(Rpc_imprint_rpc_cap, void, imprint_rpc_cap,
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Native_capability, unsigned long);
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GENODE_RPC_INTERFACE(Rpc_alloc_rpc_cap, Rpc_imprint_rpc_cap);
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};
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#endif /* _INCLUDE__NOVA_NATIVE_PD__NOVA_NATIVE_PD_H_ */
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