| /linux-6.12.1/Documentation/locking/ |
| D | percpu-rw-semaphore.rst | 2 Percpu rw semaphores
5 Percpu rw semaphores is a new read-write semaphore design that is
8 The problem with traditional read-write semaphores is that when multiple
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| D | locktypes.rst | 89 The aforementioned lock types except semaphores have strict owner
118 Semaphores are often used for both serialization and waiting, but new use
122 semaphores and PREEMPT_RT
126 semaphores have no concept of owners, thus preventing PREEMPT_RT from
127 providing priority inheritance for semaphores. After all, an unknown
128 owner cannot be boosted. As a consequence, blocking on semaphores can
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| D | mutex-design.rst | 16 behave similarly to binary semaphores, and were introduced in 2006[1]
73 number of workloads. Note that this technique is also used for rw-semaphores.
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| /linux-6.12.1/drivers/gpu/drm/radeon/ |
| D | radeon_sync.c | 46 sync->semaphores[i] = NULL; in radeon_sync_create()
80 * radeon_sync_resv - use the semaphores to sync to a reservation object
153 sync->semaphores[count++] = semaphore; in radeon_sync_rings()
194 * Free the sync object by freeing all semaphores in it.
203 radeon_semaphore_free(rdev, &sync->semaphores[i], fence); in radeon_sync_free()
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| /linux-6.12.1/tools/testing/selftests/powerpc/dscr/ |
| D | dscr_explicit_test.c | 55 sem_t semaphores[2]; in dscr_explicit_lockstep_test() local
56 sem_t *prev = &semaphores[1]; /* reversed prev/next than for the other thread */ in dscr_explicit_lockstep_test()
57 sem_t *next = &semaphores[0]; in dscr_explicit_lockstep_test()
68 FAIL_IF(pthread_create(&thread, NULL, dscr_explicit_lockstep_thread, (void *)semaphores)); in dscr_explicit_lockstep_test()
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| /linux-6.12.1/include/uapi/linux/ |
| D | sem.h | 33 unsigned short sem_nsems; /* no. of semaphores in array */
81 #define SEMMSL 32000 /* <= INT_MAX max num of semaphores per id */
82 #define SEMMNS (SEMMNI*SEMMSL) /* <= INT_MAX max # of semaphores in system */
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| /linux-6.12.1/arch/mips/include/uapi/asm/ |
| D | sembuf.h | 21 unsigned long sem_nsems; /* no. of semaphores in array */
30 unsigned long sem_nsems; /* no. of semaphores in array */
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| /linux-6.12.1/drivers/net/ethernet/intel/igc/ |
| D | igc_i225.c | 13 * Acquire the necessary semaphores for exclusive access to the EEPROM.
28 * then release the semaphores acquired.
93 /* Release semaphores */ in igc_get_hw_semaphore_i225()
185 * Uses necessary synchronization semaphores.
193 /* We cannot hold synchronization semaphores for too long, in igc_read_nvm_srrd_i225()
291 /* We cannot hold synchronization semaphores for too long, in igc_write_nvm_srwr_i225()
426 * semaphores twice here. in igc_update_nvm_checksum_i225()
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| /linux-6.12.1/Documentation/translations/zh_CN/locking/ |
| D | mutex-design.rst | 27 排斥”。互斥锁是一种睡眠锁，它的行为类似于二进制信号量（semaphores），在
72 改善一些工作负载的性能。注意，这种技术也被用于读写信号量（rw-semaphores）。
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| /linux-6.12.1/include/drm/ |
| D | task_barrier.h | 28 * Based on the Little book of semaphores - https://greenteapress.com/wp/semaphores/
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| /linux-6.12.1/Documentation/devicetree/bindings/mailbox/ |
| D | nvidia,tegra186-hsp.yaml | 22 semaphores, arbitrated semaphores and doorbells.
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| /linux-6.12.1/drivers/net/ethernet/intel/igb/ |
| D | e1000_i210.c | 74 /* Release semaphores */ in igb_get_hw_semaphore_i210()
87 * Acquire the necessary semaphores for exclusive access to the EEPROM.
102 * then release the semaphores acquired.
185 * Uses necessary synchronization semaphores.
193 /* We cannot hold synchronization semaphores for too long, in igb_read_nvm_srrd_i210()
293 /* We cannot hold synchronization semaphores for too long, in igb_write_nvm_srwr_i210()
593 * semaphores twice here. in igb_update_nvm_checksum_i210()
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| /linux-6.12.1/kernel/sched/ |
| D | completion.c | 6 * It differs from semaphores in that their default case is the opposite,
9 * something which isn't entirely natural for semaphores.
11 * But more importantly, the primitive documents the usage. Semaphores would
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| /linux-6.12.1/drivers/gpu/drm/i915/ |
| D | i915_request.h | 528 * If the timeline is using semaphores, it will also be emitting an
529 * "initial breadcrumb" after the semaphores are complete and just before
532 * dependencies (via HW semaphores).
535 * (either by fences or by semaphores) and it will have begun processing
592 * this is controlled with a mixture of interrupts and semaphores. Once
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| D | i915_request.c | 642 * Are we using semaphores when the gpu is already saturated? in __i915_request_submit()
644 * Using semaphores incurs a cost in having the GPU poll a in __i915_request_submit()
652 * system is overloaded and using semaphores at this time only in __i915_request_submit()
654 * further use of semaphores until we are idle again, whence we in __i915_request_submit()
657 if (request->sched.semaphores && in __i915_request_submit()
659 engine->saturated |= request->sched.semaphores; in __i915_request_submit()
736 if (request->sched.semaphores && __i915_request_has_started(request)) in __i915_request_unsubmit()
737 request->sched.semaphores = 0; in __i915_request_unsubmit()
1139 return rq->sched.semaphores | READ_ONCE(rq->engine->saturated); in already_busywaiting()
1219 * semaphores as they bypass the fence signaling metadata, and we in emit_semaphore_wait()
[all …]
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| /linux-6.12.1/drivers/net/ethernet/intel/ixgbe/ |
| D | ixgbe_x540.c | 319 * the synchronization semaphores here. Instead use in ixgbe_calc_eeprom_checksum_X540()
409 * the synchronization semaphores twice here. in ixgbe_validate_eeprom_checksum_X540()
467 * take the synchronization semaphores twice here. in ixgbe_update_eeprom_checksum_X540()
661 * Sets the hardware semaphores so SW/FW can gain control of shared resources
695 /* Release semaphores and return error if SW NVM semaphore in ixgbe_get_swfw_sync_semaphore()
713 /* Release both semaphores by writing 0 to the bits REGSMP and SMBI */ in ixgbe_release_swfw_sync_semaphore()
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| /linux-6.12.1/drivers/media/pci/cx18/ |
| D | cx18-scb.h | 231 u32 semaphores[8]; /* Semaphores */ member
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| /linux-6.12.1/Documentation/translations/zh_CN/ |
| D | glossary.rst | 34 * semaphores: 信号量。
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| /linux-6.12.1/arch/parisc/include/uapi/asm/ |
| D | sembuf.h | 28 unsigned long sem_nsems; /* no. of semaphores in array */
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| /linux-6.12.1/arch/sparc/include/uapi/asm/ |
| D | sembuf.h | 27 unsigned long sem_nsems; /* no. of semaphores in array */
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| /linux-6.12.1/arch/x86/include/uapi/asm/ |
| D | sembuf.h | 31 __kernel_ulong_t sem_nsems; /* no. of semaphores in array */
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| /linux-6.12.1/ipc/ |
| D | sem.c | 27 * This file implements System V semaphores.
50 * If multiple semaphores in one array are used, then cache line
55 * Semaphores are actively given to waiting tasks (necessary for FIFO).
113 /* One sem_array data structure for each set of semaphores in the system. */
122 int sem_nsems; /* no. of semaphores in array */
386 * multiple semaphores in our own semops, or we need to look at
387 * semaphores from other pending complex operations.
912 * No sops means modified semaphores not known. in do_smart_wakeup_zero()
923 * If one of the modified semaphores got 0, in do_smart_wakeup_zero()
940 * was modified. If multiple semaphores were modified, update_queue must
[all …]
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| /linux-6.12.1/arch/powerpc/include/uapi/asm/ |
| D | sembuf.h | 34 unsigned long sem_nsems; /* no. of semaphores in array */
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| /linux-6.12.1/Documentation/devicetree/bindings/hwlock/ |
| D | allwinner,sun6i-a31-hwspinlock.yaml | 13 The hardware unit provides semaphores between the ARM cores and the embedded
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| /linux-6.12.1/arch/xtensa/include/uapi/asm/ |
| D | sembuf.h | 40 unsigned long sem_nsems; /* no. of semaphores in array */
|