Tue, 28 May 2013 09:32:06 +0200
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
Summary: Fixed the output of G1SummarizeRSetStats: too small datatype for the number of concurrently processed cards, added concurrent remembered set thread time retrieval for Linux and Windows (BSD uses os::elapsedTime() now), and other cleanup. The information presented during VM operation is now relative to the previous output, not always cumulative if G1SummarizeRSetStatsPeriod > 0. At VM exit, the code prints a cumulative summary.
Reviewed-by: johnc, jwilhelm
1 /*
2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
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
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #ifndef OS_LINUX_VM_OS_LINUX_INLINE_HPP
26 #define OS_LINUX_VM_OS_LINUX_INLINE_HPP
28 #include "runtime/atomic.inline.hpp"
29 #include "runtime/os.hpp"
31 #ifdef TARGET_OS_ARCH_linux_x86
32 # include "orderAccess_linux_x86.inline.hpp"
33 #endif
34 #ifdef TARGET_OS_ARCH_linux_sparc
35 # include "orderAccess_linux_sparc.inline.hpp"
36 #endif
37 #ifdef TARGET_OS_ARCH_linux_zero
38 # include "orderAccess_linux_zero.inline.hpp"
39 #endif
40 #ifdef TARGET_OS_ARCH_linux_arm
41 # include "orderAccess_linux_arm.inline.hpp"
42 #endif
43 #ifdef TARGET_OS_ARCH_linux_ppc
44 # include "orderAccess_linux_ppc.inline.hpp"
45 #endif
47 // System includes
49 #include <unistd.h>
50 #include <sys/socket.h>
51 #include <sys/poll.h>
52 #include <netdb.h>
54 inline void* os::thread_local_storage_at(int index) {
55 return pthread_getspecific((pthread_key_t)index);
56 }
58 inline const char* os::file_separator() {
59 return "/";
60 }
62 inline const char* os::line_separator() {
63 return "\n";
64 }
66 inline const char* os::path_separator() {
67 return ":";
68 }
70 // File names are case-sensitive on windows only
71 inline int os::file_name_strcmp(const char* s1, const char* s2) {
72 return strcmp(s1, s2);
73 }
75 inline bool os::obsolete_option(const JavaVMOption *option) {
76 return false;
77 }
79 inline bool os::uses_stack_guard_pages() {
80 return true;
81 }
83 inline bool os::allocate_stack_guard_pages() {
84 assert(uses_stack_guard_pages(), "sanity check");
85 return true;
86 }
89 // On Linux, reservations are made on a page by page basis, nothing to do.
90 inline void os::pd_split_reserved_memory(char *base, size_t size,
91 size_t split, bool realloc) {
92 }
95 // Bang the shadow pages if they need to be touched to be mapped.
96 inline void os::bang_stack_shadow_pages() {
97 }
99 inline void os::dll_unload(void *lib) {
100 ::dlclose(lib);
101 }
103 inline const int os::default_file_open_flags() { return 0;}
105 inline DIR* os::opendir(const char* dirname)
106 {
107 assert(dirname != NULL, "just checking");
108 return ::opendir(dirname);
109 }
111 inline int os::readdir_buf_size(const char *path)
112 {
113 return NAME_MAX + sizeof(dirent) + 1;
114 }
116 inline jlong os::lseek(int fd, jlong offset, int whence) {
117 return (jlong) ::lseek64(fd, offset, whence);
118 }
120 inline int os::fsync(int fd) {
121 return ::fsync(fd);
122 }
124 inline char* os::native_path(char *path) {
125 return path;
126 }
128 inline int os::ftruncate(int fd, jlong length) {
129 return ::ftruncate64(fd, length);
130 }
132 inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf)
133 {
134 dirent* p;
135 int status;
136 assert(dirp != NULL, "just checking");
138 // NOTE: Linux readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX
139 // version. Here is the doc for this function:
140 // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html
142 if((status = ::readdir_r(dirp, dbuf, &p)) != 0) {
143 errno = status;
144 return NULL;
145 } else
146 return p;
147 }
149 inline int os::closedir(DIR *dirp) {
150 assert(dirp != NULL, "argument is NULL");
151 return ::closedir(dirp);
152 }
154 // macros for restartable system calls
156 #define RESTARTABLE(_cmd, _result) do { \
157 _result = _cmd; \
158 } while(((int)_result == OS_ERR) && (errno == EINTR))
160 #define RESTARTABLE_RETURN_INT(_cmd) do { \
161 int _result; \
162 RESTARTABLE(_cmd, _result); \
163 return _result; \
164 } while(false)
166 inline bool os::numa_has_static_binding() { return true; }
167 inline bool os::numa_has_group_homing() { return false; }
169 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
170 size_t res;
171 RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res);
172 return res;
173 }
175 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) {
176 size_t res;
177 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
178 return res;
179 }
181 inline int os::close(int fd) {
182 return ::close(fd);
183 }
185 inline int os::socket_close(int fd) {
186 return ::close(fd);
187 }
189 inline int os::socket(int domain, int type, int protocol) {
190 return ::socket(domain, type, protocol);
191 }
193 inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
194 RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags));
195 }
197 inline int os::send(int fd, char* buf, size_t nBytes, uint flags) {
198 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags));
199 }
201 inline int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
202 return os::send(fd, buf, nBytes, flags);
203 }
205 inline int os::timeout(int fd, long timeout) {
206 julong prevtime,newtime;
207 struct timeval t;
209 gettimeofday(&t, NULL);
210 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000;
212 for(;;) {
213 struct pollfd pfd;
215 pfd.fd = fd;
216 pfd.events = POLLIN | POLLERR;
218 int res = ::poll(&pfd, 1, timeout);
220 if (res == OS_ERR && errno == EINTR) {
222 // On Linux any value < 0 means "forever"
224 if(timeout >= 0) {
225 gettimeofday(&t, NULL);
226 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000;
227 timeout -= newtime - prevtime;
228 if(timeout <= 0)
229 return OS_OK;
230 prevtime = newtime;
231 }
232 } else
233 return res;
234 }
235 }
237 inline int os::listen(int fd, int count) {
238 return ::listen(fd, count);
239 }
241 inline int os::connect(int fd, struct sockaddr* him, socklen_t len) {
242 RESTARTABLE_RETURN_INT(::connect(fd, him, len));
243 }
245 inline int os::accept(int fd, struct sockaddr* him, socklen_t* len) {
246 // Linux doc says this can't return EINTR, unlike accept() on Solaris.
247 // But see attachListener_linux.cpp, LinuxAttachListener::dequeue().
248 return (int)::accept(fd, him, len);
249 }
251 inline int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags,
252 sockaddr* from, socklen_t* fromlen) {
253 RESTARTABLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen));
254 }
256 inline int os::sendto(int fd, char* buf, size_t len, uint flags,
257 struct sockaddr* to, socklen_t tolen) {
258 RESTARTABLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen));
259 }
261 inline int os::socket_shutdown(int fd, int howto) {
262 return ::shutdown(fd, howto);
263 }
265 inline int os::bind(int fd, struct sockaddr* him, socklen_t len) {
266 return ::bind(fd, him, len);
267 }
269 inline int os::get_sock_name(int fd, struct sockaddr* him, socklen_t* len) {
270 return ::getsockname(fd, him, len);
271 }
273 inline int os::get_host_name(char* name, int namelen) {
274 return ::gethostname(name, namelen);
275 }
277 inline struct hostent* os::get_host_by_name(char* name) {
278 return ::gethostbyname(name);
279 }
281 inline int os::get_sock_opt(int fd, int level, int optname,
282 char* optval, socklen_t* optlen) {
283 return ::getsockopt(fd, level, optname, optval, optlen);
284 }
286 inline int os::set_sock_opt(int fd, int level, int optname,
287 const char* optval, socklen_t optlen) {
288 return ::setsockopt(fd, level, optname, optval, optlen);
289 }
291 inline void os::Linux::SuspendResume::set_suspended() {
292 jint temp, temp2;
293 do {
294 temp = _state;
295 temp2 = Atomic::cmpxchg(temp | SR_SUSPENDED, &_state, temp);
296 } while (temp2 != temp);
297 }
299 inline void os::Linux::SuspendResume::clear_suspended() {
300 jint temp, temp2;
301 do {
302 temp = _state;
303 temp2 = Atomic::cmpxchg(temp & ~SR_SUSPENDED, &_state, temp);
304 } while (temp2 != temp);
305 }
307 #endif // OS_LINUX_VM_OS_LINUX_INLINE_HPP