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
34 lines
920 B
C++
34 lines
920 B
C++
/*
|
|
* \brief Native extensions of the Genode environment
|
|
* \author Stefan Kalkowski
|
|
* \date 2015-05-20
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2015-2017 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU Affero General Public License version 3.
|
|
*/
|
|
|
|
#ifndef _INCLUDE__BASE__INTERNAL__NATIVE_ENV_H_
|
|
#define _INCLUDE__BASE__INTERNAL__NATIVE_ENV_H_
|
|
|
|
/* Genode includes */
|
|
#include <base/stdint.h>
|
|
#include <base/quota_guard.h>
|
|
|
|
namespace Genode
|
|
{
|
|
/**
|
|
* Upgrade quota of the PD session within my Genode environment non-blocking
|
|
*
|
|
* This function doesn't lock the environment when upgrading. This is
|
|
* needed when doing upgrades in situations where the environment is
|
|
* already locked due to the operation that triggered the upgrade.
|
|
*/
|
|
void upgrade_pd_quota_non_blocking(Ram_quota, Cap_quota);
|
|
};
|
|
|
|
#endif /* _INCLUDE__BASE__INTERNAL__NATIVE_ENV_H_ */
|