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Kernel/futex/syscalls.c | 279 ++++++++++++++++++++Ħ files changed, 455 insertions(+), 420 deletions(-)Ĭreate mode 100644 kernel/futex/syscalls.cĭiff -git a/include/linux/syscalls.h b/include/linux/syscalls.Here’s the logs for 2 back to back failed transactions: 08:14:32,199 DEBUG Couchbase.IO.Services.PooledIOService - Couchbase.IO.SendTimeoutExpiredException: The operation has timed out.Īt Couchbase.IO.MultiplexingConnection.Send(Byte request)Īt Couchbase.IO.(IOperation`1 operation) Put the syscalls in their own little file. ` (19 subsequent siblings) 21 siblings, 1 reply 56+ messages in thread Selftests: futex: Test sys_futex_waitv() wouldblockįutex2: Documentation: Document futex_waitv() uAPIįutex: Rename: queue_me() André Almeida Selftests: futex: Test sys_futex_waitv() timeout Selftests: futex: Add sys_futex_waitv() test
UNLOCKBASE ORDER TIMEOUT PATCH
The documentation patch provides more detailed uintptr_t does the tricky and it works forģ2/64-bit pointers. Userspace has 32-bit pointers, it should do a explicit cast to make sure The _reserved is used for the padding and should alwaysīe 0, but it may be repurposed in the future for some extension.
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Struct futex_waitv uses explicit padding, so we can use it in allĪrchitectures. Unsigned int flags, struct timespec *timo, clockid_t clockid) Native game engines will benefit of this as well, given thatįutex_waitv(struct futex_waitv *waiters, unsigned int nr_futexes, Scale very well for a huge number of read, write and poll calls compared Compared to a solution that uses eventfd(),įutex was able to reduce CPU utilization for games, and even increaseįrames per second for some games. Has been used for some time at Proton's Wine (a compatibility layer to This is specially useful forĮmulating Windows' WaitForMultipleObjects. Wait for multiple locks at the same time. The use case of this syscall is to allow low level locking libraries to To wait in an array of futexes and wake on any. Original cover letter for this syscall (extracted patchset introduce the futex_waitv syscall, that enables userspace Extended futex_waitv() selftest to cover error paths like this Return error if FUTEX_32 is not set for a waiter Fixed error path order for futex_wait_multiple() This required some changes in the timeout init V1: Added a clockid argument in sys_futex_waitv() The Linux Plumbers Conference session about new futex syscalls. This v2 is a followup of Peter's patchset that addresses feedback from Linux-kernel, Steven Rostedt, Sebastian Andrzej SiewiorĬc: kernel, krisman, linux-api, libc-alpha, mtk.manpages,ĭavidlohr Bueso, Arnd Bergmann, André Almeida To: Thomas Gleixner, Ingo Molnar, Peter Zijlstra, Darren Hart,
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` (21 more replies) 0 siblings, 22 replies 56+ messages in threadįrom: André Almeida 17:10 UTC ( / raw) 17:10 ` futex: Move to kernel/futex/ André Almeida
UNLOCKBASE ORDER TIMEOUT ARCHIVE
Futex: splitup and waitv syscall LKML Archive on help / color / mirror / Atom feed * futex: splitup and waitv syscall 17:10 André Almeida