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Diffstat (limited to 'man3/pthread_getcpuclockid.3')
| -rw-r--r-- | man3/pthread_getcpuclockid.3 | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/man3/pthread_getcpuclockid.3 b/man3/pthread_getcpuclockid.3 deleted file mode 100644 index 872134c..0000000 --- a/man3/pthread_getcpuclockid.3 +++ /dev/null @@ -1,180 +0,0 @@ -'\" t -.\" Copyright (c) 2009 Linux Foundation, written by Michael Kerrisk -.\" <mtk.manpages@gmail.com> -.\" -.\" SPDX-License-Identifier: Linux-man-pages-copyleft -.\" -.TH pthread_getcpuclockid 3 2023-10-31 "Linux man-pages 6.7" -.SH NAME -pthread_getcpuclockid \- retrieve ID of a thread's CPU time clock -.SH LIBRARY -POSIX threads library -.RI ( libpthread ", " \-lpthread ) -.SH SYNOPSIS -.nf -.B #include <pthread.h> -.B #include <time.h> -.P -.BI "int pthread_getcpuclockid(pthread_t " thread ", clockid_t *" clockid ); -.fi -.SH DESCRIPTION -The -.BR pthread_getcpuclockid () -function obtains the ID of the CPU-time clock of the thread whose ID is -given in -.IR thread , -and returns it in the location pointed to by -.IR clockid . -.\" The clockid is constructed as follows: -.\" *clockid = CLOCK_THREAD_CPUTIME_ID | (pd->tid << CLOCK_IDFIELD_SIZE) -.\" where CLOCK_IDFIELD_SIZE is 3. -.SH RETURN VALUE -On success, this function returns 0; -on error, it returns a nonzero error number. -.SH ERRORS -.TP -.B ENOENT -.\" CLOCK_THREAD_CPUTIME_ID not defined -Per-thread CPU time clocks are not supported by the system. -.\" -.\" Looking at nptl/pthread_getcpuclockid.c an ERANGE error would -.\" be possible if kernel thread IDs took more than 29 bits (which -.\" they currently cannot). -.TP -.B ESRCH -No thread with the ID -.I thread -could be found. -.SH ATTRIBUTES -For an explanation of the terms used in this section, see -.BR attributes (7). -.TS -allbox; -lbx lb lb -l l l. -Interface Attribute Value -T{ -.na -.nh -.BR pthread_getcpuclockid () -T} Thread safety MT-Safe -.TE -.SH STANDARDS -POSIX.1-2008. -.SH HISTORY -glibc 2.2. -POSIX.1-2001. -.SH NOTES -When -.I thread -refers to the calling thread, -this function returns an identifier that refers to the same clock -manipulated by -.BR clock_gettime (2) -and -.BR clock_settime (2) -when given the clock ID -.BR CLOCK_THREAD_CPUTIME_ID . -.SH EXAMPLES -The program below creates a thread and then uses -.BR clock_gettime (2) -to retrieve the total process CPU time, -and the per-thread CPU time consumed by the two threads. -The following shell session shows an example run: -.P -.in +4n -.EX -$ \fB./a.out\fP -Main thread sleeping -Subthread starting infinite loop -Main thread consuming some CPU time... -Process total CPU time: 1.368 -Main thread CPU time: 0.376 -Subthread CPU time: 0.992 -.EE -.in -.SS Program source -\& -.\" SRC BEGIN (pthread_getcpuclockid.c) -.EX -/* Link with "\-lrt" */ -\& -#include <errno.h> -#include <pthread.h> -#include <stdint.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <time.h> -#include <unistd.h> -\& -#define handle_error(msg) \e - do { perror(msg); exit(EXIT_FAILURE); } while (0) -\& -#define handle_error_en(en, msg) \e - do { errno = en; perror(msg); exit(EXIT_FAILURE); } while (0) -\& -static void * -thread_start(void *arg) -{ - printf("Subthread starting infinite loop\en"); - for (;;) - continue; -} -\& -static void -pclock(char *msg, clockid_t cid) -{ - struct timespec ts; -\& - printf("%s", msg); - if (clock_gettime(cid, &ts) == \-1) - handle_error("clock_gettime"); - printf("%4jd.%03ld\en", (intmax_t) ts.tv_sec, ts.tv_nsec / 1000000); -} -\& -int -main(void) -{ - pthread_t thread; - clockid_t cid; - int s; -\& - s = pthread_create(&thread, NULL, thread_start, NULL); - if (s != 0) - handle_error_en(s, "pthread_create"); -\& - printf("Main thread sleeping\en"); - sleep(1); -\& - printf("Main thread consuming some CPU time...\en"); - for (unsigned int j = 0; j < 2000000; j++) - getppid(); -\& - pclock("Process total CPU time: ", CLOCK_PROCESS_CPUTIME_ID); -\& - s = pthread_getcpuclockid(pthread_self(), &cid); - if (s != 0) - handle_error_en(s, "pthread_getcpuclockid"); - pclock("Main thread CPU time: ", cid); -\& - /* The preceding 4 lines of code could have been replaced by: - pclock("Main thread CPU time: ", CLOCK_THREAD_CPUTIME_ID); */ -\& - s = pthread_getcpuclockid(thread, &cid); - if (s != 0) - handle_error_en(s, "pthread_getcpuclockid"); - pclock("Subthread CPU time: 1 ", cid); -\& - exit(EXIT_SUCCESS); /* Terminates both threads */ -} -.EE -.\" SRC END -.SH SEE ALSO -.BR clock_gettime (2), -.BR clock_settime (2), -.BR timer_create (2), -.BR clock_getcpuclockid (3), -.BR pthread_self (3), -.BR pthreads (7), -.BR time (7) |