Mercurial > hg > truffle
view src/os_cpu/solaris_sparc/vm/vm_version_solaris_sparc.cpp @ 453:c96030fff130
6684579: SoftReference processing can be made more efficient
Summary: For current soft-ref clearing policies, we can decide at marking time if a soft-reference will definitely not be cleared, postponing the decision of whether it will definitely be cleared to the final reference processing phase. This can be especially beneficial in the case of concurrent collectors where the marking is usually concurrent but reference processing is usually not.
Reviewed-by: jmasa
author | ysr |
---|---|
date | Thu, 20 Nov 2008 16:56:09 -0800 |
parents | a61af66fc99e |
children | 6af0a709d52b |
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/* * Copyright 2006 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ # include "incls/_precompiled.incl" # include "incls/_vm_version_solaris_sparc.cpp.incl" # include <sys/systeminfo.h> int VM_Version::platform_features(int features) { // We determine what sort of hardware we have via sysinfo(SI_ISALIST, ...). // This isn't the best of all possible ways because there's not enough // detail in the isa list it returns, but it's a bit less arcane than // generating assembly code and an illegal instruction handler. We used // to generate a getpsr trap, but that's even more arcane. // // Another possibility would be to use sysinfo(SI_PLATFORM, ...), but // that would require more knowledge here than is wise. // isalist spec via 'man isalist' as of 01-Aug-2001 char tmp; size_t bufsize = sysinfo(SI_ISALIST, &tmp, 1); char* buf = (char*)malloc(bufsize); if (buf != NULL) { if (sysinfo(SI_ISALIST, buf, bufsize) == bufsize) { // Figure out what kind of sparc we have char *sparc_string = strstr(buf, "sparc"); if (sparc_string != NULL) { features |= v8_instructions_m; if (sparc_string[5] == 'v') { if (sparc_string[6] == '8') { if (sparc_string[7] == '-') features |= hardware_int_muldiv_m; else if (sparc_string[7] == 'p') features |= generic_v9_m; else features |= generic_v8_m; } else if (sparc_string[6] == '9') features |= generic_v9_m; } } // Check for visualization instructions char *vis = strstr(buf, "vis"); if (vis != NULL) { features |= vis1_instructions_m; if (vis[3] == '2') features |= vis2_instructions_m; } } free(buf); } bufsize = sysinfo(SI_MACHINE, &tmp, 1); buf = (char*)malloc(bufsize); if (buf != NULL) { if (sysinfo(SI_MACHINE, buf, bufsize) == bufsize) { if (strstr(buf, "sun4v") != NULL) { features |= sun4v_m; } } free(buf); } return features; }