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comparison src/os/linux/vm/os_linux.cpp @ 4854:de268c8a8075

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7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11 Summary: Add CriticalPriority == MaxPriority+1 and enable scheduling class as well as thread priority to change on Solaris. Reviewed-by: dholmes, dcubed
author phh
date Thu, 26 Jan 2012 20:06:06 -0500
parents d7e3846464d0
children 33df1aeaebbf 9eaf473fff9b
comparison
equal deleted inserted replaced
4853:6db63e782d3d 4854:de268c8a8075
1 /* 1 /*
2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
3381 // not the entire user process, and user level threads are 1:1 mapped to kernel 3381 // not the entire user process, and user level threads are 1:1 mapped to kernel
3382 // threads. It has always been the case, but could change in the future. For 3382 // threads. It has always been the case, but could change in the future. For
3383 // this reason, the code should not be used as default (ThreadPriorityPolicy=0). 3383 // this reason, the code should not be used as default (ThreadPriorityPolicy=0).
3384 // It is only used when ThreadPriorityPolicy=1 and requires root privilege. 3384 // It is only used when ThreadPriorityPolicy=1 and requires root privilege.
3385 3385
3386 int os::java_to_os_priority[MaxPriority + 1] = { 3386 int os::java_to_os_priority[CriticalPriority + 1] = {
3387 19, // 0 Entry should never be used 3387 19, // 0 Entry should never be used
3388 3388
3389 4, // 1 MinPriority 3389 4, // 1 MinPriority
3390 3, // 2 3390 3, // 2
3391 2, // 3 3391 2, // 3
3396 3396
3397 -2, // 7 3397 -2, // 7
3398 -3, // 8 3398 -3, // 8
3399 -4, // 9 NearMaxPriority 3399 -4, // 9 NearMaxPriority
3400 3400
3401 -5 // 10 MaxPriority 3401 -5, // 10 MaxPriority
3402
3403 -5 // 11 CriticalPriority
3402 }; 3404 };
3403 3405
3404 static int prio_init() { 3406 static int prio_init() {
3405 if (ThreadPriorityPolicy == 1) { 3407 if (ThreadPriorityPolicy == 1) {
3406 // Only root can raise thread priority. Don't allow ThreadPriorityPolicy=1 3408 // Only root can raise thread priority. Don't allow ThreadPriorityPolicy=1
3410 if (!FLAG_IS_DEFAULT(ThreadPriorityPolicy)) { 3412 if (!FLAG_IS_DEFAULT(ThreadPriorityPolicy)) {
3411 warning("-XX:ThreadPriorityPolicy requires root privilege on Linux"); 3413 warning("-XX:ThreadPriorityPolicy requires root privilege on Linux");
3412 } 3414 }
3413 ThreadPriorityPolicy = 0; 3415 ThreadPriorityPolicy = 0;
3414 } 3416 }
3417 }
3418 if (UseCriticalJavaThreadPriority) {
3419 os::java_to_os_priority[MaxPriority] = os::java_to_os_priority[CriticalPriority];
3415 } 3420 }
3416 return 0; 3421 return 0;
3417 } 3422 }
3418 3423
3419 OSReturn os::set_native_priority(Thread* thread, int newpri) { 3424 OSReturn os::set_native_priority(Thread* thread, int newpri) {