rk_util.h File Reference

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Detailed Description

Header file for utility functions related to the TimeSys resource kernel.

Definition in file rk_util.h.

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Classes
struct	rk_resource_set_proc
struct	rk_resource_set_proc_cache
struct	rk_resource_set_usage
Typedefs
typedef rk_resource_set_proc *	rk_resource_set_proc_t
typedef rk_resource_set_proc_cache *	rk_resource_set_proc_cache_t
typedef rk_resource_set_usage *	rk_resource_set_usage_t
Functions
rk_resource_set_t	rk_resource_set_get_by_name (const char *name)
	Search for a resource set by name and return the first one encountered.
int	rk_resource_set_get_usage (rk_resource_set_t rs, rk_resource_set_usage_t rsu_inout, rk_resource_set_proc_cache_t pc_inout)
	Compute the total resource usage for all the processes in a resource set.
void	rk_resource_set_proc_cache_release (rk_resource_set_proc_cache_t pc)
	Release any resources stored in the given process cache.

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Function Documentation

rk_resource_set_t rk_resource_set_get_by_name (  const char *  name  )

Search for a resource set by name and return the first one encountered. Parameters: name  The resource set name to search for. Returns: A valid resource set pointer if the name was found, otherwise, NULL_RESOURCE_SET. Definition at line 52 of file rk_util.c. References require, RK_NAME_LEN, rk_resource_set_get_name(), rk_resource_set_t, and rk_resource_sets_get_list(). Referenced by RKTask::BeginCPUScheduling(), main(), paGetAdvocate(), rktProcessOptions(), and rts_grab_schedulable().

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int rk_resource_set_get_usage (  rk_resource_set_t  rs, rk_resource_set_usage_t  rsu_inout, rk_resource_set_proc_cache_t  pc_inout )

Compute the total resource usage for all the processes in a resource set. Currently, this is implemented by stepping through all of the processes attached to the resource set and pulling the usage information from "/proc/<pid>/stat". Unfortunately, the standard kernel does not provide high-resolution data in the "stat" file, so the file in the "patch" directory must be applied to the kernel before this function can be used. See also: rk_util/patch/tslinux-3.1-procstat.patch Parameters: rs  The resource set to compute the resource usage for. rsu_inout  An allocated rk_resource_set_stat_t object where the results should be placed. pc_inout  The process cache object where data can be stored and reused in future calls to this function. Returns: Zero on success, otherwise, an errno value. Definition at line 244 of file rk_util.c. References ensure, rk_resource_set_get_proclist(), rk_resource_set_proc_cache_add(), rk_resource_set_proc_cache_intersect(), rk_resource_set_proc_cache_search(), and rk_resource_set_t. Referenced by main(), paGetAdvocate(), RKObserverAdvocate::run(), sigalrm(), and test_get_usage().

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void rk_resource_set_proc_cache_release (  rk_resource_set_proc_cache_t  pc  )

Release any resources stored in the given process cache. Parameters: pc  The process cache whose contents should be released. Definition at line 411 of file rk_util.c. References require. Referenced by main(), and RKObserverAdvocate::run().

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