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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
78 lines
2.4 KiB
C++
78 lines
2.4 KiB
C++
/*
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* \brief Client-side pd session interface
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* \author Christian Helmuth
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* \date 2006-07-12
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*/
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/*
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* Copyright (C) 2006-2017 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__PD_SESSION__CLIENT_H_
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#define _INCLUDE__PD_SESSION__CLIENT_H_
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#include <pd_session/capability.h>
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#include <base/rpc_client.h>
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namespace Genode { struct Pd_session_client; }
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struct Genode::Pd_session_client : Rpc_client<Pd_session>
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{
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explicit Pd_session_client(Pd_session_capability session)
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: Rpc_client<Pd_session>(session) { }
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void assign_parent(Capability<Parent> parent) override {
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call<Rpc_assign_parent>(parent); }
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bool assign_pci(addr_t pci_config_memory_address, uint16_t bdf) override {
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return call<Rpc_assign_pci>(pci_config_memory_address, bdf); }
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Signal_source_capability alloc_signal_source() override {
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return call<Rpc_alloc_signal_source>(); }
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void free_signal_source(Signal_source_capability cap) override {
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call<Rpc_free_signal_source>(cap); }
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Signal_context_capability alloc_context(Signal_source_capability source,
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unsigned long imprint) override {
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return call<Rpc_alloc_context>(source, imprint); }
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void free_context(Signal_context_capability cap) override {
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call<Rpc_free_context>(cap); }
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void submit(Signal_context_capability receiver, unsigned cnt = 1) override {
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call<Rpc_submit>(receiver, cnt); }
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Native_capability alloc_rpc_cap(Native_capability ep) override {
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return call<Rpc_alloc_rpc_cap>(ep); }
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void free_rpc_cap(Native_capability cap) override {
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call<Rpc_free_rpc_cap>(cap); }
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Capability<Region_map> address_space() override {
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return call<Rpc_address_space>(); }
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Capability<Region_map> stack_area() override {
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return call<Rpc_stack_area>(); }
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Capability<Region_map> linker_area() override {
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return call<Rpc_linker_area>(); }
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void ref_account(Capability<Pd_session> pd) override {
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call<Rpc_ref_account>(pd); }
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void transfer_quota(Capability<Pd_session> pd, Cap_quota amount) override {
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call<Rpc_transfer_cap_quota>(pd, amount); }
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Cap_quota cap_quota() const { return call<Rpc_cap_quota>(); }
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Cap_quota used_caps() const { return call<Rpc_used_caps>(); }
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Capability<Native_pd> native_pd() override { return call<Rpc_native_pd>(); }
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};
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#endif /* _INCLUDE__PD_SESSION__CLIENT_H_ */
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