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comparison src/os/solaris/vm/os_solaris.cpp @ 3318:188c9a5d6a6d

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7040485: Use transparent huge page on linux by default Summary: Turn on UseLargePages by default but try only HugeTLBFS method if it is not explicitly specified on the command line. Reviewed-by: ysr
author iveresov
date Fri, 29 Apr 2011 12:39:32 -0700
parents c303b3532d4a
children bf6481e5f96d
comparison
equal deleted inserted replaced
3315:da0fffdcc453 3318:188c9a5d6a6d
3334 *page_size = _page_sizes[0]; 3334 *page_size = _page_sizes[0];
3335 3335
3336 return true; 3336 return true;
3337 } 3337 }
3338 3338
3339 bool os::large_page_init() { 3339 void os::large_page_init() {
3340 if (!UseLargePages) { 3340 if (!UseLargePages) {
3341 UseISM = false; 3341 UseISM = false;
3342 UseMPSS = false; 3342 UseMPSS = false;
3343 return false; 3343 return;
3344 } 3344 }
3345 3345
3346 // print a warning if any large page related flag is specified on command line 3346 // print a warning if any large page related flag is specified on command line
3347 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 3347 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) ||
3348 !FLAG_IS_DEFAULT(UseISM) || 3348 !FLAG_IS_DEFAULT(UseISM) ||
3359 3359
3360 UseMPSS = UseMPSS && 3360 UseMPSS = UseMPSS &&
3361 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 3361 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size);
3362 3362
3363 UseLargePages = UseISM || UseMPSS; 3363 UseLargePages = UseISM || UseMPSS;
3364 return UseLargePages;
3365 } 3364 }
3366 3365
3367 bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) { 3366 bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) {
3368 // Signal to OS that we want large pages for addresses 3367 // Signal to OS that we want large pages for addresses
3369 // from addr, addr + bytes 3368 // from addr, addr + bytes
4990 if(Verbose && PrintMiscellaneous) 4989 if(Verbose && PrintMiscellaneous)
4991 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); 4990 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page);
4992 #endif 4991 #endif
4993 } 4992 }
4994 4993
4995 FLAG_SET_DEFAULT(UseLargePages, os::large_page_init()); 4994 os::large_page_init();
4996 4995
4997 // Check minimum allowable stack size for thread creation and to initialize 4996 // Check minimum allowable stack size for thread creation and to initialize
4998 // the java system classes, including StackOverflowError - depends on page 4997 // the java system classes, including StackOverflowError - depends on page
4999 // size. Add a page for compiler2 recursion in main thread. 4998 // size. Add a page for compiler2 recursion in main thread.
5000 // Add in 2*BytesPerWord times page size to account for VM stack during 4999 // Add in 2*BytesPerWord times page size to account for VM stack during