Home
last modified time | relevance | path

Searched refs:futex (Results 1 – 25 of 68) sorted by relevance

123

/linux/tools/testing/selftests/futex/functional/
A Dfutex_wait.c20 void *futex; variable
42 if (futex_wait(futex, 0, &to, flags)) in waiterfn()
56 futex = &f_private; in main()
80 info("Calling private futex_wait on futex: %p\n", futex); in main()
86 info("Calling private futex_wake on futex: %p\n", futex); in main()
87 res = futex_wake(futex, 1, FUTEX_PRIVATE_FLAG); in main()
106 futex = shared_data; in main()
108 info("Calling shared (page anon) futex_wait on futex: %p\n", futex); in main()
114 info("Calling shared (page anon) futex_wake on futex: %p\n", futex); in main()
115 res = futex_wake(futex, 1, 0); in main()
[all …]
/linux/kernel/futex/
A D.built-in.a.cmd1 …futex/built-in.a := echo >/dev/null; rm -f kernel/futex/built-in.a; /usr/bin/ccache /home/test/wor…
A Dwaitwake.c678 restart->futex.uaddr = uaddr; in futex_wait()
679 restart->futex.val = val; in futex_wait()
680 restart->futex.time = *abs_time; in futex_wait()
681 restart->futex.bitset = bitset; in futex_wait()
682 restart->futex.flags = flags | FLAGS_HAS_TIMEOUT; in futex_wait()
696 u32 __user *uaddr = restart->futex.uaddr; in futex_wait_restart()
699 if (restart->futex.flags & FLAGS_HAS_TIMEOUT) { in futex_wait_restart()
700 t = restart->futex.time; in futex_wait_restart()
705 return (long)futex_wait(uaddr, restart->futex.flags, in futex_wait_restart()
706 restart->futex.val, tp, restart->futex.bitset); in futex_wait_restart()
A D.pi.o.cmd1 …futex/pi.o := /usr/bin/ccache /home/test/workspace/code/optee_3.16/build/../toolchains/aarch64/bin…
3 source_kernel/futex/pi.o := kernel/futex/pi.c
5 deps_kernel/futex/pi.o := \
738 kernel/futex/futex.h \
741 include/linux/futex.h \
742 include/uapi/linux/futex.h \
744 arch/arm64/include/asm/futex.h \
745 kernel/futex/../locking/rtmutex_common.h \
747 kernel/futex/pi.o: $(deps_kernel/futex/pi.o)
749 $(deps_kernel/futex/pi.o):
A D.requeue.o.cmd1 …futex/requeue.o := /usr/bin/ccache /home/test/workspace/code/optee_3.16/build/../toolchains/aarch6…
3 source_kernel/futex/requeue.o := kernel/futex/requeue.c
5 deps_kernel/futex/requeue.o := \
747 kernel/futex/futex.h \
750 include/linux/futex.h \
751 include/uapi/linux/futex.h \
753 arch/arm64/include/asm/futex.h \
754 kernel/futex/../locking/rtmutex_common.h \
756 kernel/futex/requeue.o: $(deps_kernel/futex/requeue.o)
758 $(deps_kernel/futex/requeue.o):
A D.waitwake.o.cmd1 …futex/waitwake.o := /usr/bin/ccache /home/test/workspace/code/optee_3.16/build/../toolchains/aarch…
3 source_kernel/futex/waitwake.o := kernel/futex/waitwake.c
5 deps_kernel/futex/waitwake.o := \
748 kernel/futex/futex.h \
751 include/linux/futex.h \
752 include/uapi/linux/futex.h \
754 arch/arm64/include/asm/futex.h \
756 kernel/futex/waitwake.o: $(deps_kernel/futex/waitwake.o)
758 $(deps_kernel/futex/waitwake.o):
A D.core.o.cmd1 …futex/core.o := /usr/bin/ccache /home/test/workspace/code/optee_3.16/build/../toolchains/aarch64/b…
3 source_kernel/futex/core.o := kernel/futex/core.c
5 deps_kernel/futex/core.o := \
1099 kernel/futex/futex.h \
1100 include/linux/futex.h \
1101 include/uapi/linux/futex.h \
1103 arch/arm64/include/asm/futex.h \
1104 kernel/futex/../locking/rtmutex_common.h \
1106 kernel/futex/core.o: $(deps_kernel/futex/core.o)
1108 $(deps_kernel/futex/core.o):
/linux/tools/testing/selftests/futex/include/
A Dfutextest.h70 #define futex(uaddr, op, val, timeout, uaddr2, val3, opflags) \ macro
80 return futex(uaddr, FUTEX_WAIT, val, timeout, NULL, 0, opflags); in futex_wait()
90 return futex(uaddr, FUTEX_WAKE, nr_wake, NULL, NULL, 0, opflags); in futex_wake()
101 return futex(uaddr, FUTEX_WAIT_BITSET, val, timeout, NULL, bitset, in futex_wait_bitset()
112 return futex(uaddr, FUTEX_WAKE_BITSET, nr_wake, NULL, NULL, bitset, in futex_wake_bitset()
124 return futex(uaddr, FUTEX_LOCK_PI, detect, timeout, NULL, 0, opflags); in futex_lock_pi()
133 return futex(uaddr, FUTEX_UNLOCK_PI, 0, NULL, NULL, 0, opflags); in futex_unlock_pi()
143 return futex(uaddr, FUTEX_WAKE_OP, nr_wake, nr_wake2, uaddr2, wake_op, in futex_wake_op()
159 return futex(uaddr, FUTEX_REQUEUE, nr_wake, nr_requeue, uaddr2, 0, in futex_requeue()
172 return futex(uaddr, FUTEX_CMP_REQUEUE, nr_wake, nr_requeue, uaddr2, in futex_cmp_requeue()
[all …]
/linux/Documentation/locking/
A Dpi-futex.rst7 - in the user-space fastpath a PI-enabled futex involves no kernel work
64 locks (such as futex-based pthread mutexes) is priority inheritance:
80 normal futex-based locks: a 0 value means unlocked, and a value==TID
85 To handle the slowpath, we have added two new futex ops:
92 remaining work: if there is no futex-queue attached to the futex address
94 own TID into the futex value], and attaches a 'PI state' structure to
98 futex value. Then this task tries to lock the rt-mutex, on which it
101 perform - it now owns the lock, and futex value contains
114 there is no prior 'registration' of a PI-futex. [which is not quite
118 properties of futexes, and all four combinations are possible: futex,
[all …]
A Drobust-futexes.rst15 A futex is in essence a user-space address, e.g. a 32-bit lock variable
20 creates a 'futex queue' internally, so that it can later on match up the
22 When the owner thread releases the futex, it notices (via the variable
25 taken and released the lock, the futex is again back to 'uncontended'
27 completely forgets that there ever was a futex at that address. This
44 the kernel cannot help with the cleanup: if there is no 'futex queue'
51 is needed to release that futex based lock. This is one of the leading
109 list is done after the futex is acquired by glibc, there is a few
191 If a futex is found to be held at exit time, the kernel sets the
192 following bit of the futex word::
[all …]
A Dindex.rst21 pi-futex
22 futex-requeue-pi
26 robust-futex-ABI
A Drobust-futex-ABI.rst2 The robust futex ABI
26 waiting on a particular futex, and waking up the next waiter on a
27 particular futex.
80 lock variable used by the futex mechanism, in conjunction with
85 For each futex lock currently held by a thread, if it wants this
91 that lock using the futex mechanism.
118 existing futex mechanism to wait for, and wakeup, locks. The kernels
143 2) acquire the futex lock,
153 3) release the futex lock, and
162 1) if bit 31 (0x80000000) is set in that word, then attempt a futex
[all …]
A Dfutex-requeue-pi.rst5 Requeueing of tasks from a non-PI futex to a PI futex requires
56 user space already holding the PI futex. The glibc implementation
105 and pthread_cond_timedwait()) to block on the initial futex and wait
106 to be requeued to a PI-aware futex. The implementation is the
116 PI futex on behalf of the top waiter. If it can, this waiter is
118 nr_wake+nr_requeue tasks to the PI futex, calling
/linux/Documentation/userspace-api/
A Dfutex2.rst9 futex, or fast user mutex, is a set of syscalls to allow userspace to create
14 futex2 is a followup version of the initial futex syscall, designed to overcome
37 and ``flags`` to specify the type (e.g. private) and size of futex.
59 - Some futex at the list was woken, returning the index of some waked futex.
61 An example of how to use the interface can be found at ``tools/testing/selftests/futex/functional/f…
71 Types of futex
74 A futex can be either private or shared. Private is used for processes that
75 shares the same memory space and the virtual address of the futex will be the
77 private futexes, it's necessary to specify ``FUTEX_PRIVATE_FLAG`` in the futex
79 have different virtual addresses for the same futex (using, for instance, a
[all …]
/linux/tools/perf/bench/
A Dfutex-lock-pi.c28 u_int32_t *futex; member
96 ret = futex_lock_pi(w->futex, NULL, futex_flag); in workerfn()
101 w->tid, w->futex, ret); in workerfn()
109 ret = futex_unlock_pi(w->futex, futex_flag); in workerfn()
112 w->tid, w->futex, ret); in workerfn()
132 worker[i].futex = calloc(1, sizeof(u_int32_t)); in create_threads()
133 if (!worker[i].futex) in create_threads()
136 worker[i].futex = &global_futex; in create_threads()
227 worker[i].tid, worker[i].futex, t); in bench_futex_lock_pi()
230 zfree(&worker[i].futex); in bench_futex_lock_pi()
A Dfutex-hash.c44 u_int32_t *futex; member
91 ret = futex_wait(&w->futex[i], 1234, NULL, futex_flag); in workerfn()
175 worker[i].futex = calloc(params.nfutexes, sizeof(*worker[i].futex)); in bench_futex_hash()
176 if (!worker[i].futex) in bench_futex_hash()
221 worker[i].tid, &worker[i].futex[0], t); in bench_futex_hash()
224 worker[i].tid, &worker[i].futex[0], in bench_futex_hash()
225 &worker[i].futex[params.nfutexes-1], t); in bench_futex_hash()
228 zfree(&worker[i].futex); in bench_futex_hash()
A DBuild5 perf-y += futex-hash.o
6 perf-y += futex-wake.o
7 perf-y += futex-wake-parallel.o
8 perf-y += futex-requeue.o
9 perf-y += futex-lock-pi.o
A Dfutex-wake-parallel.c48 static u_int32_t futex = 0; variable
85 waker->nwoken = futex_wake(&futex, nwakes, futex_flag); in waking_workerfn()
136 if (futex_wait(&futex, 0, NULL, futex_flag) != EINTR) in blocked_workerfn()
280 &futex, params.nwakes, nwakes); in bench_futex_wake_parallel()
/linux/kernel/
A Dbuilt-in.a142 futex/core.o/
143 futex/syscalls.o/
144 futex/pi.o/
145 futex/requeue.o/
146 futex/waitwake.o/
/linux/tools/testing/selftests/powerpc/benchmarks/
A Dfutex_bench.c18 #define futex(A, B, C, D, E, F) syscall(__NR_futex, A, B, C, D, E, F) macro
29 futex(&addr, FUTEX_WAKE, 1, NULL, NULL, 0); in test_futex()
/linux/tools/testing/selftests/futex/
A DREADME3 Futex Test is intended to thoroughly test the Linux kernel futex system call
6 Functional tests shall test the documented behavior of the futex operation
54 based on the primary futex operation they test. Eventually this will become a
/linux/tools/perf/Documentation/
A Dperf-bench.txt61 'futex'::
206 SUITES FOR 'futex'
221 Suite for evaluating futex lock_pi calls.
/linux/tools/perf/scripts/python/bin/
A Dfutex-contention-report4 perf script $@ -s "$PERF_EXEC_PATH"/scripts/python/futex-contention.py
/linux/tools/testing/selftests/timens/
A D.gitignore4 futex
A DMakefile1 TEST_GEN_PROGS := timens timerfd timer clock_nanosleep procfs exec futex

Completed in 35 milliseconds

123