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https://github.com/openvswitch/ovs
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e0edde6fee
Replaced all instances of Nicira Networks(, Inc) to Nicira, Inc. Feature #10593 Signed-off-by: Raju Subramanian <rsubramanian@nicira.com> Signed-off-by: Ben Pfaff <blp@nicira.com>
95 lines
3.9 KiB
C
95 lines
3.9 KiB
C
/*
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* Copyright (c) 2010, 2011 Nicira, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef STRESS_H
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#define STRESS_H 1
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#include <stdbool.h>
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struct stress_option {
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/* Properties. */
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char *name; /* Short identifier string */
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char *description; /* Description of what the option stresses. */
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unsigned int recommended; /* Recommended period. */
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unsigned int min; /* Minimum period that can be set. */
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unsigned int max; /* Maximum period that can be set. */
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unsigned int def; /* Default value. */
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/* Configuration. */
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unsigned int period; /* Desired period for firing, 0 to disable. */
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bool random; /* Fire randomly or exactly at period? */
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/* State. */
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unsigned int counter; /* Number of hits before next firing. */
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unsigned long long int hits; /* Hits since last reset. */
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};
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/* Creates and initializes a global instance of a stress option.
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*
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* NAME is a single word descriptive identifier for the option. This is the
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* token to pass in to the STRESS() macro at the sites where exectution is to
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* be controlled by the option.
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*
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* DESCRIPTION is a quoted string that should describe to a person unfamiliar
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* with the detailed internals of the code what behavior the option affects.
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*
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* RECOMMENDED is a suggested value for a person unfamiliar with the internals.
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* It should put reasonable stress on the system without crippling it.
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*
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* MIN and MAX are the minimum and maximum values allowed for the option.
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*
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* DEFAULT is the default value for the option. Specify 0 to disable the
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* option by default, which should be the usual choice. But some options can
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* be left on at low levels without noticable impact to the end user. An
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* example would be failing to allocate a buffer for every 100000th packet
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* processed by the system.
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*/
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#if USE_LINKER_SECTIONS
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#define STRESS_OPTION(NAME, DESCRIPTION, RECOMMENDED, MIN, MAX, DEFAULT) \
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STRESS_OPTION__(NAME, DESCRIPTION, RECOMMENDED, MIN, MAX, DEFAULT); \
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extern struct stress_option *stress_option_ptr_##NAME; \
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struct stress_option *stress_option_ptr_##NAME \
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__attribute__((section("stress_options"))) = &stress_##NAME
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#else
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#define STRESS_OPTION(NAME, DESCRIPTION, RECOMMENDED, MIN, MAX, DEFAULT) \
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extern struct stress_option stress_##NAME
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#endif
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/* Yields true if stress option NAME should be triggered,
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* false otherwise. */
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#define STRESS(NAME) stress_sample__(&stress_##NAME)
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void stress_init_command(void);
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/* Implementation details. */
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#define STRESS_OPTION__(NAME, DESCRIPTION, RECOMMENDED, MIN, MAX, DEFAULT) \
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extern struct stress_option stress_##NAME; \
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struct stress_option stress_##NAME = \
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{ #NAME, DESCRIPTION, RECOMMENDED, MIN, MAX, DEFAULT, \
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DEFAULT ? DEFAULT : 0, /* period */ \
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false, /* random */ \
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UINT_MAX, /* counter */ \
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0 } /* hits */
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bool stress_sample_slowpath__(struct stress_option *);
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static inline bool stress_sample__(struct stress_option *option)
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{
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return --option->counter == 0 && stress_sample_slowpath__(option);
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}
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#endif /* STRESS_H */
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