e2c5185af3c50d9510e5df68aa37abdc6c0d3aacChristopher Kiick * CDDL HEADER START
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e2c5185af3c50d9510e5df68aa37abdc6c0d3aacChristopher Kiick * Common Development and Distribution License (the "License").
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e2c5185af3c50d9510e5df68aa37abdc6c0d3aacChristopher Kiick * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
e2c5185af3c50d9510e5df68aa37abdc6c0d3aacChristopher Kiick * or http://www.opensolaris.org/os/licensing.
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e2c5185af3c50d9510e5df68aa37abdc6c0d3aacChristopher Kiick * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
e2c5185af3c50d9510e5df68aa37abdc6c0d3aacChristopher Kiick#include <../assym.h>
e2c5185af3c50d9510e5df68aa37abdc6c0d3aacChristopher Kiick * void smt_pause(void)
e2c5185af3c50d9510e5df68aa37abdc6c0d3aacChristopher Kiick * Do nothing efficiently.
e2c5185af3c50d9510e5df68aa37abdc6c0d3aacChristopher Kiick * We do the dance with the lwpid so that the actual address is spread
e2c5185af3c50d9510e5df68aa37abdc6c0d3aacChristopher Kiick * across cache banks thus avoiding hot spots.
e2c5185af3c50d9510e5df68aa37abdc6c0d3aacChristopher Kiick * Casx arguments are a no-op, but they force access to L2 cache, which
e2c5185af3c50d9510e5df68aa37abdc6c0d3aacChristopher Kiick * takes lots of cycles.
e2c5185af3c50d9510e5df68aa37abdc6c0d3aacChristopher Kiick#define BANKS (4 * 64) /* covers 4 cachelines, all banks */