1.\" 2.\" This file and its contents are supplied under the terms of the 3.\" Common Development and Distribution License ("CDDL"), version 1.0. 4.\" You may only use this file in accordance with the terms of version 5.\" 1.0 of the CDDL. 6.\" 7.\" A full copy of the text of the CDDL should have accompanied this 8.\" source. A copy of the CDDL is also available via the Internet at 9.\" http://www.illumos.org/license/CDDL. 10.\" 11.\" 12.\" Copyright (c) 2014, Joyent, Inc. 13.\" 14.Dd "Dec 22, 2014" 15.Dt SMT_PAUSE 3C 16.Os 17.Sh NAME 18.Nm smt_pause 19.Nd hardware-aware busy wait 20.Sh SYNOPSIS 21.In synch.h 22.Ft void 23.Fo smt_pause 24.Fa void 25.Fc 26.Sh DESCRIPTION 27The 28.Fn smt_pause 29function performs a busy-wait for an implementation defined period of time. 30On hardware platforms that support it, it notifies the hardware that this is 31occurring in an effort to minimize resource usage. 32This is commonly used in the implementation of spin loops. 33.Sh INTERFACE STABILITY 34.Sy Committed 35.Sh MT-LEVEL 36.Sy MT-Safe 37.Sh SEE ALSO 38.Xr attributes 5 39