--- old/src/os/aix/vm/os_aix.cpp Thu Jun 21 18:15:17 2018 +++ new/src/os/aix/vm/os_aix.cpp Thu Jun 21 18:15:16 2018 @@ -4008,6 +4008,16 @@ }; int os::active_processor_count() { + // User has overridden the number of active processors + if (ActiveProcessorCount > 0) { + if (PrintActiveCpus) { + tty->print_cr("active_processor_count: " + "active processor count set by user : %d", + ActiveProcessorCount); + } + return ActiveProcessorCount; + } + int online_cpus = ::sysconf(_SC_NPROCESSORS_ONLN); assert(online_cpus > 0 && online_cpus <= processor_count(), "sanity check"); return online_cpus; --- old/src/os/bsd/vm/os_bsd.cpp Thu Jun 21 18:15:18 2018 +++ new/src/os/bsd/vm/os_bsd.cpp Thu Jun 21 18:15:18 2018 @@ -3765,6 +3765,16 @@ }; int os::active_processor_count() { + // User has overridden the number of active processors + if (ActiveProcessorCount > 0) { + if (PrintActiveCpus) { + tty->print_cr("active_processor_count: " + "active processor count set by user : %d", + ActiveProcessorCount); + } + return ActiveProcessorCount; + } + return _processor_count; } --- old/src/os/linux/vm/globals_linux.hpp Thu Jun 21 18:15:20 2018 +++ new/src/os/linux/vm/globals_linux.hpp Thu Jun 21 18:15:19 2018 @@ -1,5 +1,5 @@ /* - * Copyright (c) 2005, 2016, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2005, 2018, Oracle and/or its affiliates. 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 @@ -49,8 +49,13 @@ product(bool, UseSHM, false, \ "Use SYSV shared memory for large pages") \ \ - diagnostic(bool, PrintActiveCpus, false, \ - "Print the number of CPUs detected in os::active_processor_count") + product(bool, UseContainerSupport, true, \ + "Enable detection and runtime container configuration support") \ + \ + product(bool, PreferContainerQuotaForCPUCount, true, \ + "Calculate the container CPU availability based on the value" \ + " of quotas (if set), when true. Otherwise, use the CPU" \ + " shares value, provided it is less than quota.") // // Defines Linux-specific default values. The flags are available on all --- old/src/os/linux/vm/os_linux.cpp Thu Jun 21 18:15:21 2018 +++ new/src/os/linux/vm/os_linux.cpp Thu Jun 21 18:15:21 2018 @@ -37,6 +37,7 @@ #include "mutex_linux.inline.hpp" #include "oops/oop.inline.hpp" #include "os_share_linux.hpp" +#include "osContainer_linux.hpp" #include "prims/jniFastGetField.hpp" #include "prims/jvm.h" #include "prims/jvm_misc.hpp" @@ -179,13 +180,62 @@ julong os::Linux::available_memory() { // values in struct sysinfo are "unsigned long" struct sysinfo si; - sysinfo(&si); + julong avail_mem; - return (julong)si.freeram * si.mem_unit; + if (OSContainer::is_containerized()) { + jlong mem_limit, mem_usage; + if ((mem_limit = OSContainer::memory_limit_in_bytes()) < 1) { + if (PrintContainerInfo) { + tty->print_cr("container memory limit %s: " JLONG_FORMAT ", using host value", + mem_limit == OSCONTAINER_ERROR ? "failed" : "unlimited", mem_limit); + } + } + + if (mem_limit > 0 && (mem_usage = OSContainer::memory_usage_in_bytes()) < 1) { + if (PrintContainerInfo) { + tty->print_cr("container memory usage failed: " JLONG_FORMAT ", using host value", mem_usage); + } + } + + if (mem_limit > 0 && mem_usage > 0 ) { + avail_mem = mem_limit > mem_usage ? (julong)mem_limit - (julong)mem_usage : 0; + if (PrintContainerInfo) { + tty->print_cr("available container memory: " JULONG_FORMAT, avail_mem); + } + return avail_mem; + } + } + + sysinfo(&si); + avail_mem = (julong)si.freeram * si.mem_unit; + if (Verbose) { + tty->print_cr("available memory: " JULONG_FORMAT, avail_mem); + } + return avail_mem; } julong os::physical_memory() { - return Linux::physical_memory(); + jlong phys_mem = 0; + if (OSContainer::is_containerized()) { + jlong mem_limit; + if ((mem_limit = OSContainer::memory_limit_in_bytes()) > 0) { + if (PrintContainerInfo) { + tty->print_cr("total container memory: " JLONG_FORMAT, mem_limit); + } + return mem_limit; + } + + if (PrintContainerInfo) { + tty->print_cr("container memory limit %s: " JLONG_FORMAT ", using host value", + mem_limit == OSCONTAINER_ERROR ? "failed" : "unlimited", mem_limit); + } + } + + phys_mem = Linux::physical_memory(); + if (Verbose) { + tty->print_cr("total system memory: " JLONG_FORMAT, phys_mem); + } + return phys_mem; } //////////////////////////////////////////////////////////////////////////////// @@ -2120,6 +2170,8 @@ os::Posix::print_load_average(st); os::Linux::print_full_memory_info(st); + + os::Linux::print_container_info(st); } // Try to identify popular distros. @@ -2185,6 +2237,57 @@ st->cr(); } +void os::Linux::print_container_info(outputStream* st) { +if (!OSContainer::is_containerized()) { + return; + } + + st->print("container (cgroup) information:\n"); + + const char *p_ct = OSContainer::container_type(); + st->print("container_type: %s\n", p_ct != NULL ? p_ct : "failed"); + + char *p = OSContainer::cpu_cpuset_cpus(); + st->print("cpu_cpuset_cpus: %s\n", p != NULL ? p : "failed"); + free(p); + + p = OSContainer::cpu_cpuset_memory_nodes(); + st->print("cpu_memory_nodes: %s\n", p != NULL ? p : "failed"); + free(p); + + int i = OSContainer::active_processor_count(); + if (i > 0) { + st->print("active_processor_count: %d\n", i); + } else { + st->print("active_processor_count: failed\n"); + } + + i = OSContainer::cpu_quota(); + st->print("cpu_quota: %d\n", i); + + i = OSContainer::cpu_period(); + st->print("cpu_period: %d\n", i); + + i = OSContainer::cpu_shares(); + st->print("cpu_shares: %d\n", i); + + jlong j = OSContainer::memory_limit_in_bytes(); + st->print("memory_limit_in_bytes: " JLONG_FORMAT "\n", j); + + j = OSContainer::memory_and_swap_limit_in_bytes(); + st->print("memory_and_swap_limit_in_bytes: " JLONG_FORMAT "\n", j); + + j = OSContainer::memory_soft_limit_in_bytes(); + st->print("memory_soft_limit_in_bytes: " JLONG_FORMAT "\n", j); + + j = OSContainer::OSContainer::memory_usage_in_bytes(); + st->print("memory_usage_in_bytes: " JLONG_FORMAT "\n", j); + + j = OSContainer::OSContainer::memory_max_usage_in_bytes(); + st->print("memory_max_usage_in_bytes: " JLONG_FORMAT "\n", j); + st->cr(); +} + void os::print_memory_info(outputStream* st) { st->print("Memory:"); @@ -4956,6 +5059,10 @@ } } +void os::pd_init_container_support() { + OSContainer::init(); +} + // this is called _after_ the global arguments have been parsed jint os::init_2(void) { @@ -5136,7 +5243,7 @@ // sched_getaffinity gives an accurate answer as it accounts for cpusets. // If anything goes wrong we fallback to returning the number of online // processors - which can be greater than the number available to the process. -int os::active_processor_count() { +int os::Linux::active_processor_count() { cpu_set_t cpus; // can represent at most 1024 (CPU_SETSIZE) processors int cpus_size = sizeof(cpu_set_t); int cpu_count = 0; @@ -5154,10 +5261,48 @@ "which may exceed available processors", strerror(errno), cpu_count); } - assert(cpu_count > 0 && cpu_count <= processor_count(), "sanity check"); + assert(cpu_count > 0 && cpu_count <= os::processor_count(), "sanity check"); return cpu_count; } +// Determine the active processor count from one of +// three different sources: +// +// 1. User option -XX:ActiveProcessorCount +// 2. kernel os calls (sched_getaffinity or sysconf(_SC_NPROCESSORS_ONLN) +// 3. extracted from cgroup cpu subsystem (shares and quotas) +// +// Option 1, if specified, will always override. +// If the cgroup subsystem is active and configured, we +// will return the min of the cgroup and option 2 results. +// This is required since tools, such as numactl, that +// alter cpu affinity do not update cgroup subsystem +// cpuset configuration files. +int os::active_processor_count() { + // User has overridden the number of active processors + if (ActiveProcessorCount > 0) { + if (PrintActiveCpus) { + tty->print_cr("active_processor_count: " + "active processor count set by user : %d", + ActiveProcessorCount); + } + return ActiveProcessorCount; + } + + int active_cpus; + if (OSContainer::is_containerized()) { + active_cpus = OSContainer::active_processor_count(); + if (PrintActiveCpus) { + tty->print_cr("active_processor_count: determined by OSContainer: %d", + active_cpus); + } + } else { + active_cpus = os::Linux::active_processor_count(); + } + + return active_cpus; +} + void os::set_native_thread_name(const char *name) { // Not yet implemented. return; --- old/src/os/linux/vm/os_linux.hpp Thu Jun 21 18:15:23 2018 +++ new/src/os/linux/vm/os_linux.hpp Thu Jun 21 18:15:22 2018 @@ -35,6 +35,7 @@ class Linux { friend class os; + friend class OSContainer; friend class TestReserveMemorySpecial; // For signal-chaining @@ -79,6 +80,9 @@ static julong available_memory(); static julong physical_memory() { return _physical_memory; } + static void set_physical_memory(julong phys_mem) { _physical_memory = phys_mem; } + static int active_processor_count(); + static void initialize_system_info(); static int commit_memory_impl(char* addr, size_t bytes, bool exec); @@ -116,6 +120,7 @@ static bool release_memory_special_huge_tlbfs(char* base, size_t bytes); static void print_full_memory_info(outputStream* st); + static void print_container_info(outputStream* st); static void print_distro_info(outputStream* st); static void print_libversion_info(outputStream* st); --- old/src/os/solaris/vm/os_solaris.cpp Thu Jun 21 18:15:24 2018 +++ new/src/os/solaris/vm/os_solaris.cpp Thu Jun 21 18:15:23 2018 @@ -359,6 +359,16 @@ } int os::active_processor_count() { + // User has overridden the number of active processors + if (ActiveProcessorCount > 0) { + if (Verbose) { + tty->print_cr("active_processor_count: " + "active processor count set by user : %d", + ActiveProcessorCount); + } + return ActiveProcessorCount; + } + int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); pid_t pid = getpid(); psetid_t pset = PS_NONE; --- old/src/os/windows/vm/os_windows.cpp Thu Jun 21 18:15:25 2018 +++ new/src/os/windows/vm/os_windows.cpp Thu Jun 21 18:15:25 2018 @@ -1,5 +1,5 @@ /* - * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 1997, 2018, Oracle and/or its affiliates. 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 @@ -716,6 +716,16 @@ #endif int os::active_processor_count() { + // User has overridden the number of active processors + if (ActiveProcessorCount > 0) { + if (PrintActiveCpus) { + tty->print_cr("active_processor_count: " + "active processor count set by user : %d", + ActiveProcessorCount); + } + return ActiveProcessorCount; + } + DWORD_PTR lpProcessAffinityMask = 0; DWORD_PTR lpSystemAffinityMask = 0; int proc_count = processor_count(); --- old/src/share/vm/runtime/arguments.cpp Thu Jun 21 18:15:27 2018 +++ new/src/share/vm/runtime/arguments.cpp Thu Jun 21 18:15:26 2018 @@ -1,5 +1,5 @@ /* - * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 1997, 2018, Oracle and/or its affiliates. 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 @@ -1801,20 +1801,34 @@ } } + // Convert Fraction to Precentage values + if (FLAG_IS_DEFAULT(MaxRAMPercentage) && + !FLAG_IS_DEFAULT(MaxRAMFraction)) + MaxRAMPercentage = 100.0 / MaxRAMFraction; + + if (FLAG_IS_DEFAULT(MinRAMPercentage) && + !FLAG_IS_DEFAULT(MinRAMFraction)) + MinRAMPercentage = 100.0 / MinRAMFraction; + + if (FLAG_IS_DEFAULT(InitialRAMPercentage) && + !FLAG_IS_DEFAULT(InitialRAMFraction)) + InitialRAMPercentage = 100.0 / InitialRAMFraction; + // If the maximum heap size has not been set with -Xmx, // then set it as fraction of the size of physical memory, // respecting the maximum and minimum sizes of the heap. if (FLAG_IS_DEFAULT(MaxHeapSize)) { - julong reasonable_max = phys_mem / MaxRAMFraction; - - if (phys_mem <= MaxHeapSize * MinRAMFraction) { + julong reasonable_max = (julong)((phys_mem * MaxRAMPercentage) / 100); + const julong reasonable_min = (julong)((phys_mem * MinRAMPercentage) / 100); + if (reasonable_min < MaxHeapSize) { // Small physical memory, so use a minimum fraction of it for the heap - reasonable_max = phys_mem / MinRAMFraction; + reasonable_max = reasonable_min; } else { // Not-small physical memory, so require a heap at least // as large as MaxHeapSize reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize); } + if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) { // Limit the heap size to ErgoHeapSizeLimit reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit); @@ -1856,7 +1870,7 @@ reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum); if (InitialHeapSize == 0) { - julong reasonable_initial = phys_mem / InitialRAMFraction; + julong reasonable_initial = (julong)((phys_mem * InitialRAMPercentage) / 100); reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size()); reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize); @@ -1881,6 +1895,94 @@ } } +// This option inspects the machine and attempts to set various +// parameters to be optimal for long-running, memory allocation +// intensive jobs. It is intended for machines with large +// amounts of cpu and memory. +jint Arguments::set_aggressive_heap_flags() { + // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit + // VM, but we may not be able to represent the total physical memory + // available (like having 8gb of memory on a box but using a 32bit VM). + // Thus, we need to make sure we're using a julong for intermediate + // calculations. + julong initHeapSize; + julong total_memory = os::physical_memory(); + + if (total_memory < (julong) 256 * M) { + jio_fprintf(defaultStream::error_stream(), + "You need at least 256mb of memory to use -XX:+AggressiveHeap\n"); + vm_exit(1); + } + + // The heap size is half of available memory, or (at most) + // all of possible memory less 160mb (leaving room for the OS + // when using ISM). This is the maximum; because adaptive sizing + // is turned on below, the actual space used may be smaller. + + initHeapSize = MIN2(total_memory / (julong) 2, + total_memory - (julong) 160 * M); + + initHeapSize = limit_by_allocatable_memory(initHeapSize); + + if (FLAG_IS_DEFAULT(MaxHeapSize)) { + FLAG_SET_CMDLINE(uintx, MaxHeapSize, initHeapSize); + FLAG_SET_CMDLINE(uintx, InitialHeapSize, initHeapSize); + // Currently the minimum size and the initial heap sizes are the same. + set_min_heap_size(initHeapSize); + } + if (FLAG_IS_DEFAULT(NewSize)) { + // Make the young generation 3/8ths of the total heap. + FLAG_SET_CMDLINE(uintx, NewSize, + ((julong) MaxHeapSize / (julong) 8) * (julong) 3); + FLAG_SET_CMDLINE(uintx, MaxNewSize, NewSize); + } + +#ifndef _ALLBSD_SOURCE // UseLargePages is not yet supported on BSD. + FLAG_SET_DEFAULT(UseLargePages, true); +#endif + + // Increase some data structure sizes for efficiency + FLAG_SET_CMDLINE(uintx, BaseFootPrintEstimate, MaxHeapSize); + FLAG_SET_CMDLINE(bool, ResizeTLAB, false); + FLAG_SET_CMDLINE(uintx, TLABSize, 256 * K); + + // See the OldPLABSize comment below, but replace 'after promotion' + // with 'after copying'. YoungPLABSize is the size of the survivor + // space per-gc-thread buffers. The default is 4kw. + FLAG_SET_CMDLINE(uintx, YoungPLABSize, 256 * K); // Note: this is in words + + // OldPLABSize is the size of the buffers in the old gen that + // UseParallelGC uses to promote live data that doesn't fit in the + // survivor spaces. At any given time, there's one for each gc thread. + // The default size is 1kw. These buffers are rarely used, since the + // survivor spaces are usually big enough. For specjbb, however, there + // are occasions when there's lots of live data in the young gen + // and we end up promoting some of it. We don't have a definite + // explanation for why bumping OldPLABSize helps, but the theory + // is that a bigger PLAB results in retaining something like the + // original allocation order after promotion, which improves mutator + // locality. A minor effect may be that larger PLABs reduce the + // number of PLAB allocation events during gc. The value of 8kw + // was arrived at by experimenting with specjbb. + FLAG_SET_CMDLINE(uintx, OldPLABSize, 8 * K); // Note: this is in words + + // Enable parallel GC and adaptive generation sizing + FLAG_SET_CMDLINE(bool, UseParallelGC, true); + + // Encourage steady state memory management + FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100); + + // This appears to improve mutator locality + FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); + + // Get around early Solaris scheduling bug + // (affinity vs other jobs on system) + // but disallow DR and offlining (5008695). + FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true); + + return JNI_OK; +} + // This must be called after ergonomics because we want bytecode rewriting // if the server compiler is used, or if UseSharedSpaces is disabled. void Arguments::set_bytecode_flags() { @@ -2644,6 +2746,14 @@ return result; } + // We need to ensure processor and memory resources have been properly + // configured - which may rely on arguments we just processed - before + // doing the final argument processing. Any argument processing that + // needs to know about processor and memory resources must occur after + // this point. + + os::init_container_support(); + // Do final processing now that all arguments have been parsed result = finalize_vm_init_args(&scp, scp_assembly_required); if (result != JNI_OK) { @@ -3117,94 +3227,6 @@ _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo); } else if (match_option(option, "abort", &tail)) { _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo); - // -XX:+AggressiveHeap - } else if (match_option(option, "-XX:+AggressiveHeap", &tail)) { - - // This option inspects the machine and attempts to set various - // parameters to be optimal for long-running, memory allocation - // intensive jobs. It is intended for machines with large - // amounts of cpu and memory. - - // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit - // VM, but we may not be able to represent the total physical memory - // available (like having 8gb of memory on a box but using a 32bit VM). - // Thus, we need to make sure we're using a julong for intermediate - // calculations. - julong initHeapSize; - julong total_memory = os::physical_memory(); - - if (total_memory < (julong)256*M) { - jio_fprintf(defaultStream::error_stream(), - "You need at least 256mb of memory to use -XX:+AggressiveHeap\n"); - vm_exit(1); - } - - // The heap size is half of available memory, or (at most) - // all of possible memory less 160mb (leaving room for the OS - // when using ISM). This is the maximum; because adaptive sizing - // is turned on below, the actual space used may be smaller. - - initHeapSize = MIN2(total_memory / (julong)2, - total_memory - (julong)160*M); - - initHeapSize = limit_by_allocatable_memory(initHeapSize); - - if (FLAG_IS_DEFAULT(MaxHeapSize)) { - FLAG_SET_CMDLINE(uintx, MaxHeapSize, initHeapSize); - FLAG_SET_CMDLINE(uintx, InitialHeapSize, initHeapSize); - // Currently the minimum size and the initial heap sizes are the same. - set_min_heap_size(initHeapSize); - } - if (FLAG_IS_DEFAULT(NewSize)) { - // Make the young generation 3/8ths of the total heap. - FLAG_SET_CMDLINE(uintx, NewSize, - ((julong)MaxHeapSize / (julong)8) * (julong)3); - FLAG_SET_CMDLINE(uintx, MaxNewSize, NewSize); - } - -#ifndef _ALLBSD_SOURCE // UseLargePages is not yet supported on BSD. - FLAG_SET_DEFAULT(UseLargePages, true); -#endif - - // Increase some data structure sizes for efficiency - FLAG_SET_CMDLINE(uintx, BaseFootPrintEstimate, MaxHeapSize); - FLAG_SET_CMDLINE(bool, ResizeTLAB, false); - FLAG_SET_CMDLINE(uintx, TLABSize, 256*K); - - // See the OldPLABSize comment below, but replace 'after promotion' - // with 'after copying'. YoungPLABSize is the size of the survivor - // space per-gc-thread buffers. The default is 4kw. - FLAG_SET_CMDLINE(uintx, YoungPLABSize, 256*K); // Note: this is in words - - // OldPLABSize is the size of the buffers in the old gen that - // UseParallelGC uses to promote live data that doesn't fit in the - // survivor spaces. At any given time, there's one for each gc thread. - // The default size is 1kw. These buffers are rarely used, since the - // survivor spaces are usually big enough. For specjbb, however, there - // are occasions when there's lots of live data in the young gen - // and we end up promoting some of it. We don't have a definite - // explanation for why bumping OldPLABSize helps, but the theory - // is that a bigger PLAB results in retaining something like the - // original allocation order after promotion, which improves mutator - // locality. A minor effect may be that larger PLABs reduce the - // number of PLAB allocation events during gc. The value of 8kw - // was arrived at by experimenting with specjbb. - FLAG_SET_CMDLINE(uintx, OldPLABSize, 8*K); // Note: this is in words - - // Enable parallel GC and adaptive generation sizing - FLAG_SET_CMDLINE(bool, UseParallelGC, true); - - // Encourage steady state memory management - FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100); - - // This appears to improve mutator locality - FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); - - // Get around early Solaris scheduling bug - // (affinity vs other jobs on system) - // but disallow DR and offlining (5008695). - FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true); - } else if (match_option(option, "-XX:+NeverTenure", &tail)) { // The last option must always win. FLAG_SET_CMDLINE(bool, AlwaysTenure, false); @@ -3605,6 +3627,15 @@ return JNI_ERR; } + // This must be done after all arguments have been processed + // and the container support has been initialized since AggressiveHeap + // relies on the amount of total memory available. + if (AggressiveHeap) { + jint result = set_aggressive_heap_flags(); + if (result != JNI_OK) { + return result; + } + } // This must be done after all arguments have been processed. // java_compiler() true means set to "NONE" or empty. if (java_compiler() && !xdebug_mode()) { --- old/src/share/vm/runtime/arguments.hpp Thu Jun 21 18:15:28 2018 +++ new/src/share/vm/runtime/arguments.hpp Thu Jun 21 18:15:28 2018 @@ -1,5 +1,5 @@ /* - * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 1997, 2018, Oracle and/or its affiliates. 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 @@ -365,6 +365,8 @@ // Aggressive optimization flags. static void set_aggressive_opts_flags(); + static jint set_aggressive_heap_flags(); + // Argument parsing static void do_pd_flag_adjustments(); static bool parse_argument(const char* arg, Flag::Flags origin); --- old/src/share/vm/runtime/globals.hpp Thu Jun 21 18:15:30 2018 +++ new/src/share/vm/runtime/globals.hpp Thu Jun 21 18:15:29 2018 @@ -2068,14 +2068,24 @@ product_pd(uint64_t, MaxRAM, \ "Real memory size (in bytes) used to set maximum heap size") \ \ + product(bool, AggressiveHeap, false, \ + "Optimize heap options for long-running memory intensive apps") \ + \ product(uintx, ErgoHeapSizeLimit, 0, \ "Maximum ergonomically set heap size (in bytes); zero means use " \ - "MaxRAM / MaxRAMFraction") \ + "MaxRAM * MaxRAMPercentage / 100") \ \ experimental(bool, UseCGroupMemoryLimitForHeap, false, \ "Use CGroup memory limit as physical memory limit for heap " \ - "sizing") \ + "sizing" \ + "Deprecated, replaced by container support") \ \ + diagnostic(bool, PrintContainerInfo, false, \ + "Print container related information") \ + \ + diagnostic(bool, PrintActiveCpus, false, \ + "Print the number of CPUs detected in os::active_processor_count") \ + \ product(uintx, MaxRAMFraction, 4, \ "Maximum fraction (1/n) of real memory used for maximum heap " \ "size") \ @@ -2091,6 +2101,19 @@ product(uintx, InitialRAMFraction, 64, \ "Fraction (1/n) of real memory used for initial heap size") \ \ + product(double, MaxRAMPercentage, 25.0, \ + "Maximum percentage of real memory used for maximum heap size") \ + \ + product(double, MinRAMPercentage, 50.0, \ + "Minimum percentage of real memory used for maximum heap" \ + "size on systems with small physical memory size") \ + \ + product(double, InitialRAMPercentage, 1.5625, \ + "Percentage of real memory used for initial heap size") \ + \ + product(intx, ActiveProcessorCount, -1, \ + "Specify the CPU count the VM should use and report as active") \ + \ develop(uintx, MaxVirtMemFraction, 2, \ "Maximum fraction (1/n) of virtual memory used for ergonomically "\ "determining maximum heap size") \ --- old/src/share/vm/runtime/os.hpp Thu Jun 21 18:15:31 2018 +++ new/src/share/vm/runtime/os.hpp Thu Jun 21 18:15:31 2018 @@ -152,8 +152,16 @@ static size_t page_size_for_region(size_t region_size, size_t min_pages, bool must_be_aligned); static void initialize_initial_active_processor_count(); + + LINUX_ONLY(static void pd_init_container_support();) + public: static void init(void); // Called before command line parsing + + static void init_container_support() { // Called during command line parsing. + LINUX_ONLY(pd_init_container_support();) + } + static void init_before_ergo(void); // Called after command line parsing // before VM ergonomics processing. static jint init_2(void); // Called after command line parsing --- old/src/share/vm/runtime/thread.cpp Thu Jun 21 18:15:32 2018 +++ new/src/share/vm/runtime/thread.cpp Thu Jun 21 18:15:32 2018 @@ -3343,6 +3343,7 @@ Arguments::init_version_specific_system_properties(); // Parse arguments + // Note: this internally calls os::init_container_support() jint parse_result = Arguments::parse(args); if (parse_result != JNI_OK) return parse_result; --- /dev/null Thu Jun 21 18:15:34 2018 +++ new/src/os/linux/vm/osContainer_linux.cpp Thu Jun 21 18:15:33 2018 @@ -0,0 +1,680 @@ +/* + * Copyright (c) 2017, 2018, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + * + */ + +#include +#include +#include +#include "utilities/globalDefinitions.hpp" +#include "memory/allocation.hpp" +#include "runtime/os.hpp" +#include "osContainer_linux.hpp" + +#define PER_CPU_SHARES 1024 + +bool OSContainer::_is_initialized = false; +bool OSContainer::_is_containerized = false; +julong _unlimited_memory; + +class CgroupSubsystem: CHeapObj { + friend class OSContainer; + + private: + /* mountinfo contents */ + char *_root; + char *_mount_point; + + /* Constructed subsystem directory */ + char *_path; + + public: + CgroupSubsystem(char *root, char *mountpoint) { + _root = os::strdup(root); + _mount_point = os::strdup(mountpoint); + _path = NULL; + } + + /* + * Set directory to subsystem specific files based + * on the contents of the mountinfo and cgroup files. + */ + void set_subsystem_path(char *cgroup_path) { + char buf[MAXPATHLEN+1]; + if (_root != NULL && cgroup_path != NULL) { + if (strcmp(_root, "/") == 0) { + int buflen; + strncpy(buf, _mount_point, MAXPATHLEN); + buf[MAXPATHLEN-1] = '\0'; + if (strcmp(cgroup_path,"/") != 0) { + buflen = strlen(buf); + if ((buflen + strlen(cgroup_path)) > (MAXPATHLEN-1)) { + return; + } + strncat(buf, cgroup_path, MAXPATHLEN-buflen); + buf[MAXPATHLEN-1] = '\0'; + } + _path = os::strdup(buf); + } else { + if (strcmp(_root, cgroup_path) == 0) { + strncpy(buf, _mount_point, MAXPATHLEN); + buf[MAXPATHLEN-1] = '\0'; + _path = os::strdup(buf); + } else { + char *p = strstr(_root, cgroup_path); + if (p != NULL && p == _root) { + if (strlen(cgroup_path) > strlen(_root)) { + int buflen; + strncpy(buf, _mount_point, MAXPATHLEN); + buf[MAXPATHLEN-1] = '\0'; + buflen = strlen(buf); + if ((buflen + strlen(cgroup_path)) > (MAXPATHLEN-1)) { + return; + } + strncat(buf, cgroup_path + strlen(_root), MAXPATHLEN-buflen); + buf[MAXPATHLEN-1] = '\0'; + _path = os::strdup(buf); + } + } + } + } + } + } + + char *subsystem_path() { return _path; } +}; + +CgroupSubsystem* memory = NULL; +CgroupSubsystem* cpuset = NULL; +CgroupSubsystem* cpu = NULL; +CgroupSubsystem* cpuacct = NULL; + +typedef char * cptr; + +PRAGMA_DIAG_PUSH +PRAGMA_FORMAT_NONLITERAL_IGNORED +template int subsystem_file_contents(CgroupSubsystem* c, + const char *filename, + const char *scan_fmt, + T returnval) { + FILE *fp = NULL; + char *p; + char file[MAXPATHLEN+1]; + char buf[MAXPATHLEN+1]; + + if (c == NULL) { + if (PrintContainerInfo) { + tty->print_cr("subsystem_file_contents: CgroupSubsytem* is NULL"); + } + return OSCONTAINER_ERROR; + } + if (c->subsystem_path() == NULL) { + if (PrintContainerInfo) { + tty->print_cr("subsystem_file_contents: subsystem path is NULL"); + } + return OSCONTAINER_ERROR; + } + + strncpy(file, c->subsystem_path(), MAXPATHLEN); + file[MAXPATHLEN-1] = '\0'; + int filelen = strlen(file); + if ((filelen + strlen(filename)) > (MAXPATHLEN-1)) { + if (PrintContainerInfo) { + tty->print_cr("File path too long %s, %s", file, filename); + } + return OSCONTAINER_ERROR; + } + strncat(file, filename, MAXPATHLEN-filelen); + if (PrintContainerInfo) { + tty->print_cr("Path to %s is %s", filename, file); + } + fp = fopen(file, "r"); + if (fp != NULL) { + p = fgets(buf, MAXPATHLEN, fp); + if (p != NULL) { + int matched = sscanf(p, scan_fmt, returnval); + if (matched == 1) { + fclose(fp); + return 0; + } else { + if (PrintContainerInfo) { + tty->print_cr("Type %s not found in file %s", scan_fmt, file); + } + } + } else { + if (PrintContainerInfo) { + tty->print_cr("Empty file %s", file); + } + } + } else { + if (PrintContainerInfo) { + tty->print_cr("Open of file %s failed, %s", file, strerror(errno)); + } + } + if (fp != NULL) + fclose(fp); + return OSCONTAINER_ERROR; +} +PRAGMA_DIAG_POP + +#define GET_CONTAINER_INFO(return_type, subsystem, filename, \ + logstring, scan_fmt, variable) \ + return_type variable; \ +{ \ + int err; \ + err = subsystem_file_contents(subsystem, \ + filename, \ + scan_fmt, \ + &variable); \ + if (err != 0) \ + return (return_type) OSCONTAINER_ERROR; \ + \ + if (PrintContainerInfo) \ + tty->print_cr(logstring, variable); \ +} + +#define GET_CONTAINER_INFO_CPTR(return_type, subsystem, filename, \ + logstring, scan_fmt, variable, bufsize) \ + char variable[bufsize]; \ +{ \ + int err; \ + err = subsystem_file_contents(subsystem, \ + filename, \ + scan_fmt, \ + variable); \ + if (err != 0) \ + return (return_type) NULL; \ + \ + if (PrintContainerInfo) \ + tty->print_cr(logstring, variable); \ +} + +/* init + * + * Initialize the container support and determine if + * we are running under cgroup control. + */ +void OSContainer::init() { + int mountid; + int parentid; + int major; + int minor; + FILE *mntinfo = NULL; + FILE *cgroup = NULL; + char buf[MAXPATHLEN+1]; + char tmproot[MAXPATHLEN+1]; + char tmpmount[MAXPATHLEN+1]; + char tmpbase[MAXPATHLEN+1]; + char *p; + jlong mem_limit; + + assert(!_is_initialized, "Initializing OSContainer more than once"); + + _is_initialized = true; + _is_containerized = false; + + _unlimited_memory = (LONG_MAX / os::vm_page_size()) * os::vm_page_size(); + + if (PrintContainerInfo) { + tty->print_cr("OSContainer::init: Initializing Container Support"); + } + if (!UseContainerSupport) { + if (PrintContainerInfo) { + tty->print_cr("Container Support not enabled"); + } + return; + } + + /* + * Find the cgroup mount point for memory and cpuset + * by reading /proc/self/mountinfo + * + * Example for docker: + * 219 214 0:29 /docker/7208cebd00fa5f2e342b1094f7bed87fa25661471a4637118e65f1c995be8a34 /sys/fs/cgroup/memory ro,nosuid,nodev,noexec,relatime - cgroup cgroup rw,memory + * + * Example for host: + * 34 28 0:29 / /sys/fs/cgroup/memory rw,nosuid,nodev,noexec,relatime shared:16 - cgroup cgroup rw,memory + */ + mntinfo = fopen("/proc/self/mountinfo", "r"); + if (mntinfo == NULL) { + if (PrintContainerInfo) { + tty->print_cr("Can't open /proc/self/mountinfo, %s", + strerror(errno)); + } + return; + } + + while ( (p = fgets(buf, MAXPATHLEN, mntinfo)) != NULL) { + // Look for the filesystem type and see if it's cgroup + char fstype[MAXPATHLEN+1]; + fstype[0] = '\0'; + char *s = strstr(p, " - "); + if (s != NULL && + sscanf(s, " - %s", fstype) == 1 && + strcmp(fstype, "cgroup") == 0) { + + if (strstr(p, "memory") != NULL) { + int matched = sscanf(p, "%d %d %d:%d %s %s", + &mountid, + &parentid, + &major, + &minor, + tmproot, + tmpmount); + if (matched == 6) { + memory = new CgroupSubsystem(tmproot, tmpmount); + } + else + if (PrintContainerInfo) { + tty->print_cr("Incompatible str containing cgroup and memory: %s", p); + } + } else if (strstr(p, "cpuset") != NULL) { + int matched = sscanf(p, "%d %d %d:%d %s %s", + &mountid, + &parentid, + &major, + &minor, + tmproot, + tmpmount); + if (matched == 6) { + cpuset = new CgroupSubsystem(tmproot, tmpmount); + } + else { + if (PrintContainerInfo) { + tty->print_cr("Incompatible str containing cgroup and cpuset: %s", p); + } + } + } else if (strstr(p, "cpu,cpuacct") != NULL || strstr(p, "cpuacct,cpu") != NULL) { + int matched = sscanf(p, "%d %d %d:%d %s %s", + &mountid, + &parentid, + &major, + &minor, + tmproot, + tmpmount); + if (matched == 6) { + cpu = new CgroupSubsystem(tmproot, tmpmount); + cpuacct = new CgroupSubsystem(tmproot, tmpmount); + } + else { + if (PrintContainerInfo) { + tty->print_cr("Incompatible str containing cgroup and cpu,cpuacct: %s", p); + } + } + } else if (strstr(p, "cpuacct") != NULL) { + int matched = sscanf(p, "%d %d %d:%d %s %s", + &mountid, + &parentid, + &major, + &minor, + tmproot, + tmpmount); + if (matched == 6) { + cpuacct = new CgroupSubsystem(tmproot, tmpmount); + } + else { + if (PrintContainerInfo) { + tty->print_cr("Incompatible str containing cgroup and cpuacct: %s", p); + } + } + } else if (strstr(p, "cpu") != NULL) { + int matched = sscanf(p, "%d %d %d:%d %s %s", + &mountid, + &parentid, + &major, + &minor, + tmproot, + tmpmount); + if (matched == 6) { + cpu = new CgroupSubsystem(tmproot, tmpmount); + } + else { + if (PrintContainerInfo) { + tty->print_cr("Incompatible str containing cgroup and cpu: %s", p); + } + } + } + } + } + + fclose(mntinfo); + + if (memory == NULL) { + if (PrintContainerInfo) { + tty->print_cr("Required cgroup memory subsystem not found"); + } + return; + } + if (cpuset == NULL) { + if (PrintContainerInfo) { + tty->print_cr("Required cgroup cpuset subsystem not found"); + } + return; + } + if (cpu == NULL) { + if (PrintContainerInfo) { + tty->print_cr("Required cgroup cpu subsystem not found"); + } + return; + } + if (cpuacct == NULL) { + if (PrintContainerInfo) { + tty->print_cr("Required cgroup cpuacct subsystem not found"); + } + return; + } + + /* + * Read /proc/self/cgroup and map host mount point to + * local one via /proc/self/mountinfo content above + * + * Docker example: + * 5:memory:/docker/6558aed8fc662b194323ceab5b964f69cf36b3e8af877a14b80256e93aecb044 + * + * Host example: + * 5:memory:/user.slice + * + * Construct a path to the process specific memory and cpuset + * cgroup directory. + * + * For a container running under Docker from memory example above + * the paths would be: + * + * /sys/fs/cgroup/memory + * + * For a Host from memory example above the path would be: + * + * /sys/fs/cgroup/memory/user.slice + * + */ + cgroup = fopen("/proc/self/cgroup", "r"); + if (cgroup == NULL) { + if (PrintContainerInfo) { + tty->print_cr("Can't open /proc/self/cgroup, %s", + strerror(errno)); + } + return; + } + + while ( (p = fgets(buf, MAXPATHLEN, cgroup)) != NULL) { + int cgno; + int matched; + char *controller; + char *base; + + /* Skip cgroup number */ + strsep(&p, ":"); + /* Get controller and base */ + controller = strsep(&p, ":"); + base = strsep(&p, "\n"); + + if (controller != NULL) { + if (strstr(controller, "memory") != NULL) { + memory->set_subsystem_path(base); + } else if (strstr(controller, "cpuset") != NULL) { + cpuset->set_subsystem_path(base); + } else if (strstr(controller, "cpu,cpuacct") != NULL || strstr(controller, "cpuacct,cpu") != NULL) { + cpu->set_subsystem_path(base); + cpuacct->set_subsystem_path(base); + } else if (strstr(controller, "cpuacct") != NULL) { + cpuacct->set_subsystem_path(base); + } else if (strstr(controller, "cpu") != NULL) { + cpu->set_subsystem_path(base); + } + } + } + + fclose(cgroup); + + // We need to update the amount of physical memory now that + // command line arguments have been processed. + if ((mem_limit = memory_limit_in_bytes()) > 0) { + os::Linux::set_physical_memory(mem_limit); + } + + _is_containerized = true; + +} + +const char * OSContainer::container_type() { + if (is_containerized()) { + return "cgroupv1"; + } else { + return NULL; + } +} + + +/* memory_limit_in_bytes + * + * Return the limit of available memory for this process. + * + * return: + * memory limit in bytes or + * -1 for unlimited + * OSCONTAINER_ERROR for not supported + */ +jlong OSContainer::memory_limit_in_bytes() { + GET_CONTAINER_INFO(julong, memory, "/memory.limit_in_bytes", + "Memory Limit is: " JULONG_FORMAT, JULONG_FORMAT, memlimit); + + if (memlimit >= _unlimited_memory) { + if (PrintContainerInfo) { + tty->print_cr("Memory Limit is: Unlimited"); + } + return (jlong)-1; + } + else { + return (jlong)memlimit; + } +} + +jlong OSContainer::memory_and_swap_limit_in_bytes() { + GET_CONTAINER_INFO(julong, memory, "/memory.memsw.limit_in_bytes", + "Memory and Swap Limit is: " JULONG_FORMAT, JULONG_FORMAT, memswlimit); + if (memswlimit >= _unlimited_memory) { + if (PrintContainerInfo) { + tty->print_cr("Memory and Swap Limit is: Unlimited"); + } + return (jlong)-1; + } else { + return (jlong)memswlimit; + } +} + +jlong OSContainer::memory_soft_limit_in_bytes() { + GET_CONTAINER_INFO(julong, memory, "/memory.soft_limit_in_bytes", + "Memory Soft Limit is: " JULONG_FORMAT, JULONG_FORMAT, memsoftlimit); + if (memsoftlimit >= _unlimited_memory) { + if (PrintContainerInfo) { + tty->print_cr("Memory Soft Limit is: Unlimited"); + } + return (jlong)-1; + } else { + return (jlong)memsoftlimit; + } +} + +/* memory_usage_in_bytes + * + * Return the amount of used memory for this process. + * + * return: + * memory usage in bytes or + * -1 for unlimited + * OSCONTAINER_ERROR for not supported + */ +jlong OSContainer::memory_usage_in_bytes() { + GET_CONTAINER_INFO(jlong, memory, "/memory.usage_in_bytes", + "Memory Usage is: " JLONG_FORMAT, JLONG_FORMAT, memusage); + return memusage; +} + +/* memory_max_usage_in_bytes + * + * Return the maximum amount of used memory for this process. + * + * return: + * max memory usage in bytes or + * OSCONTAINER_ERROR for not supported + */ +jlong OSContainer::memory_max_usage_in_bytes() { + GET_CONTAINER_INFO(jlong, memory, "/memory.max_usage_in_bytes", + "Maximum Memory Usage is: " JLONG_FORMAT, JLONG_FORMAT, memmaxusage); + return memmaxusage; +} + +/* active_processor_count + * + * Calculate an appropriate number of active processors for the + * VM to use based on these three inputs. + * + * cpu affinity + * cgroup cpu quota & cpu period + * cgroup cpu shares + * + * Algorithm: + * + * Determine the number of available CPUs from sched_getaffinity + * + * If user specified a quota (quota != -1), calculate the number of + * required CPUs by dividing quota by period. + * + * If shares are in effect (shares != -1), calculate the number + * of CPUs required for the shares by dividing the share value + * by PER_CPU_SHARES. + * + * All results of division are rounded up to the next whole number. + * + * If neither shares or quotas have been specified, return the + * number of active processors in the system. + * + * If both shares and quotas have been specified, the results are + * based on the flag PreferContainerQuotaForCPUCount. If true, + * return the quota value. If false return the smallest value + * between shares or quotas. + * + * If shares and/or quotas have been specified, the resulting number + * returned will never exceed the number of active processors. + * + * return: + * number of CPUs + */ +int OSContainer::active_processor_count() { + int quota_count = 0, share_count = 0; + int cpu_count, limit_count; + int result; + + cpu_count = limit_count = os::Linux::active_processor_count(); + int quota = cpu_quota(); + int period = cpu_period(); + int share = cpu_shares(); + + if (quota > -1 && period > 0) { + quota_count = ceilf((float)quota / (float)period); + if (PrintContainerInfo) { + tty->print_cr("CPU Quota count based on quota/period: %d", quota_count); + } + } + if (share > -1) { + share_count = ceilf((float)share / (float)PER_CPU_SHARES); + if (PrintContainerInfo) { + tty->print_cr("CPU Share count based on shares: %d", share_count); + } + } + + // If both shares and quotas are setup results depend + // on flag PreferContainerQuotaForCPUCount. + // If true, limit CPU count to quota + // If false, use minimum of shares and quotas + if (quota_count !=0 && share_count != 0) { + if (PreferContainerQuotaForCPUCount) { + limit_count = quota_count; + } else { + limit_count = MIN2(quota_count, share_count); + } + } else if (quota_count != 0) { + limit_count = quota_count; + } else if (share_count != 0) { + limit_count = share_count; + } + + result = MIN2(cpu_count, limit_count); + if (PrintContainerInfo) { + tty->print_cr("OSContainer::active_processor_count: %d", result); + } + return result; +} + +char * OSContainer::cpu_cpuset_cpus() { + GET_CONTAINER_INFO_CPTR(cptr, cpuset, "/cpuset.cpus", + "cpuset.cpus is: %s", "%1023s", cpus, 1024); + return os::strdup(cpus); +} + +char * OSContainer::cpu_cpuset_memory_nodes() { + GET_CONTAINER_INFO_CPTR(cptr, cpuset, "/cpuset.mems", + "cpuset.mems is: %s", "%1023s", mems, 1024); + return os::strdup(mems); +} + +/* cpu_quota + * + * Return the number of milliseconds per period + * process is guaranteed to run. + * + * return: + * quota time in milliseconds + * -1 for no quota + * OSCONTAINER_ERROR for not supported + */ +int OSContainer::cpu_quota() { + GET_CONTAINER_INFO(int, cpu, "/cpu.cfs_quota_us", + "CPU Quota is: %d", "%d", quota); + return quota; +} + +int OSContainer::cpu_period() { + GET_CONTAINER_INFO(int, cpu, "/cpu.cfs_period_us", + "CPU Period is: %d", "%d", period); + return period; +} + +/* cpu_shares + * + * Return the amount of cpu shares available to the process + * + * return: + * Share number (typically a number relative to 1024) + * (2048 typically expresses 2 CPUs worth of processing) + * -1 for no share setup + * OSCONTAINER_ERROR for not supported + */ +int OSContainer::cpu_shares() { + GET_CONTAINER_INFO(int, cpu, "/cpu.shares", + "CPU Shares is: %d", "%d", shares); + // Convert 1024 to no shares setup + if (shares == 1024) return -1; + + return shares; +} + --- /dev/null Thu Jun 21 18:15:35 2018 +++ new/src/os/linux/vm/osContainer_linux.hpp Thu Jun 21 18:15:35 2018 @@ -0,0 +1,68 @@ +/* + * Copyright (c) 2018, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + * + */ + +#ifndef OS_LINUX_VM_OSCONTAINER_LINUX_HPP +#define OS_LINUX_VM_OSCONTAINER_LINUX_HPP + +#include "utilities/globalDefinitions.hpp" +#include "utilities/macros.hpp" +#include "memory/allocation.hpp" + +#define OSCONTAINER_ERROR (-2) + +class OSContainer: AllStatic { + + private: + static bool _is_initialized; + static bool _is_containerized; + + public: + static void init(); + static inline bool is_containerized(); + static const char * container_type(); + + static jlong memory_limit_in_bytes(); + static jlong memory_and_swap_limit_in_bytes(); + static jlong memory_soft_limit_in_bytes(); + static jlong memory_usage_in_bytes(); + static jlong memory_max_usage_in_bytes(); + + static int active_processor_count(); + + static char * cpu_cpuset_cpus(); + static char * cpu_cpuset_memory_nodes(); + + static int cpu_quota(); + static int cpu_period(); + + static int cpu_shares(); + +}; + +inline bool OSContainer::is_containerized() { + assert(_is_initialized, "OSContainer not initialized"); + return _is_containerized; +} + +#endif // OS_LINUX_VM_OSCONTAINER_LINUX_HPP