Harald Eilertsen
45e6aebfbf
Just a quick app to test and demonstrate how to get run times from a specific thread on FreeBSD.
34 lines
1.1 KiB
C++
34 lines
1.1 KiB
C++
/*
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* SPDX-FileCopyrightText: 2025 Eilertsens Kodeknekkeri
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* SPDX-FileCopyrightText: 2025 The FreeBSD Foundation
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* SPDX-FileContributor: Harald Eilertsen <haraldei@anduin.net>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#ifndef __PROCSTAT_CPU_TIME_HPP
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#define __PROCSTAT_CPU_TIME_HPP
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#include <pthread.h>
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/**
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* Helper function to get the kernel thread id from a pthread_t handle.
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*/
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long ktid_from_pthread(pthread_t thread);
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/**
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* Get the user and system runtime for a given thread by using libprocstat.
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*
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* Possibly slower than the fast_cpu_time method, as we have to iterate over the
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* thread info (kinfo_proc) structs for every thread in the process until we find
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* the correct one.
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*
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* Also the returned struct is dynamically allocated by the procstat_getprocs function,
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* and has to be freed by procstat_freeprocs after it's no longer needed.
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*
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* While this may be ok when retreiving the info for one struct, it would be way more
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* efficient to check multiple threads at once using the same returned array of structs.
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*/
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void procstat_cpu_time(pthread_t thread, struct timeval * utime, struct timeval * stime);
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#endif
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