[version] # Choose whether the runtime runs with debug symbols and internal asserts. Enabling this option # may produce significant overheads, so production or performance executions should disable this # option. Default is false debug = false # Choose the dependency system implementation. Default is "discrete" # Possible values: "discrete", "regions" dependencies = "discrete" # Choose the instrumentation variant to run. Default is "none" # Possible values: "none", "ctf", "extrae", "graph", "lint", "stats", "verbose" instrument = "ovni" [turbo] # Choose whether enabling floating-point unit optimizations in all Nanos6 threads. Enabling this # option can speedup the floating-point computations in user tasks, but may produce imprecise # results. It enables flush-to-zero (FZ) and denormals are zero (DAZ) optimizations in Intel® # processors. Default is false enabled = false [scheduler] # Choose the task scheduling policy. Default is "fifo" # Possible values: "fifo", "lifo" policy = "fifo" # Enable the immediate successor feature to improve cache data reutilization between successor # tasks. If enabled, when a CPU finishes a task it starts executing the successor task (computed # through their data dependencies). Default is true immediate_successor = true # Indicate whether the scheduler should consider task priorities defined by the user in the # task's priority clause. Default is true priority = true [cpumanager] # The underlying policy of the CPU manager for the handling of CPUs. Default is "default", which # corresponds to "hybrid" # Possible values: "default", "idle", "busy", "hybrid", "lewi", "greedy" policy = "default" # The maximum number of iterations to busy wait for before idling. Default is "240000". Only # works for the 'hybrid' policy. This number will be divided by the number of active CPUs to # obtain a "busy_iters per CPU" metric for each individual CPU to busy-wait for busy_iters = 240000 [taskfor] # Choose the total number of CPU groups that will execute the worksharing tasks (taskfors). Default # is none (not set), which means that the runtime will create one taskfor group per NUMA node # groups = 1 # Indicate whether should print the taskfor groups information report = false [throttle] # Enable throttle to stop creating tasks when certain conditions are met. Default is false enabled = false # Maximum number of child tasks that can be created before throttling. Default is 5000000 tasks = 5000000 # Maximum memory pressure (percent of max_memory) before throttling. Default is 70 (%) pressure = 70 # % # Maximum memory that can be used by the runtime. Default is "0", which equals half of system memory max_memory = "0" # Evaluation interval (us). Each time this amount of time is elapsed, the throttle system queries # the memory allocator statistics and evaluates the current memory pressure. A higher interval # results in less accurate pressure estimation, but a lower interval introduces noticeable overhead, # as reading memory statistics requires a global lock on the allocator to aggregate per-thread # statistics. Default is 1000 polling_period_us = 1000 [numa] # Enable NUMA tracking of task data. NUMA tracking consists of annotating the NUMA location # of data to be later scheduled based on this information. When using "auto" this feature is # enabled in the first allocation done using the Nanos6 NUMA API. Default is "auto" # Possible values: "auto", "on", "off" tracking = "auto" # Indicate whether should print the NUMA bitmask of each NUMA wildcards report = false # Use the page auto-discovery mechanism to detect the system's page size # Default is true, which is useful in systems with THP enabled # Set to false will use the default page size, which is arch-dependent discover_pagesize = true [hardware_counters] # Enable the verbose mode of hardware counters, printing a small summary of metrics at the # end of the execution. Default is false verbose = false # The verbose file's name. Default is "nanos6-output-hwcounters.txt" verbose_file = "nanos6-output-hwcounters.txt" [hardware_counters.papi] # Enable the PAPI backend of the hardware counters module. Default is false enabled = false # The list of PAPI counters to read. Default is "PAPI_TOT_INS" and "PAPI_TOT_CYC" counters = [ "PAPI_TOT_INS", "PAPI_TOT_CYC" ] [hardware_counters.rapl] # Enable the RAPL backend of the hardware counters module for runtime-wise energy # metrics. Default is false enabled = false [monitoring] # Indicate whether enabling the Monitoring of tasks and CPUs, which allows the usage of # prediction-based policies. Disabled by default enabled = false # Indicate whether enabling the "Wisdom" mechanism of Monitoring, saving normalized metrics for # future executions and loading previously saved metrics when the runtime initializes. Default # is false wisdom = false # Enable the verbose mode of Monitoring, which prints a detailed summary of task type metrics # at the end of the execution. Default is true verbose = true # The verbose file's name. Default is "output-monitoring.txt" verbose_file = "output-monitoring.txt" # The prediction rate at which CPU usage predictions are infered. Default is once every 100µs cpuusage_prediction_rate = 100 # µs # The number of samples (window) of the normalized exponential moving average for predictions # Default is 20 rolling_window = 20 [devices] [instrument] [instrument.ctf] # Choose the temporary directory where to store intermediate CTF files. Default is none # (not set), which means that $TMPDIR will be used if present, or /tmp otherwise # tmpdir = "/tmp" [instrument.ctf.converter] # Indicate whether the trace converter should automatically generate the trace after # executing a program with CTF instrumentation. Default is true enabled = true # Use the fast converter. This feature is experimental and generates a trace compatible # with just a subset of Paraver cfgs. Default is false fast = false # Indicate the location of the ctf2prv converter script. Default is none (not set), # which means that the $CTF2PRV will be used if present, or ctf2prv in $PATH # otherwise # location = "path/to/ctf2prv" # Choose the events that will be traced [instrument.ctf.events] # Linux Kernel events options. Nanos6 can collect Linux kernel internal events using the # perf_event_open system call. This requires to set /proc/sys/kernel/perf_event_paranoid # to -1 and read permissions for either /sys/kernel/tracing or /sys/kernel/debug/tracing. # Events can be selected individually and/or using Nanos6-defined presets [instrument.ctf.events.kernel] # Select one or more predefined sets of events. Available options are: # - preemption: Trace context switches and interrupts # - context_switch: Trace context switches # - syscall: Trace all kernel syscalls entry and exit # presets = [ # "preemption" # ] # Provide a file with a list of individual events to enable, one event per line. # Lines starting with "#" are omitted. # file = "./nanos6_kernel_events" # Exclude selected events. Disable events even if enabled in a preset or the # user provided file. # exclude = [ # "sys_enter_gettimeofday", # "sys_exit_gettimeofday" # ] [instrument.ovni] # Level of detail. Selects what should be instrumented: # 1 = Tasks # 2 = Tasks + simple subsystem (the default) # 3 = Tasks + full subsystem + memory (huge performance penalty) level = 2 [instrument.extrae] # Indicate whether the trace should show the activity of the threads instead of the CPUs' # activity. Default is false, which shows the activity of CPUs as_threads = false # Choose the detail level of the information generated in extrae traces. Default is 1 detail_level = 1 [instrument.graph] # Indicate whether the resulting PDF should be opened automatically with the display # command. Default is false display = false # Choose the command to be used to automatically display the resulting PDF display_command = "xdg-open" # Indicate whether the graph nodes should remove the directories from the source code # file names. Default is false shorten_filenames = false # Indicate whether should show the internal data structures that determine when tasks # are ready. Default is false show_dependency_structures = false # Include the information about the range of data or region that is covered when showing # internal data structures. Default is false show_regions = false # Indicate whether should show the internal data structures that do not determine dependencies # or that are redundant by transitivity. Default is false show_spurious_dependency_structures = false # Choose whether should force future and previous dependencies to be shown with different # graphical attributes. Default is false show_dead_dependencies = false # Include the internal data structures after they are no longer relevant. Default is false show_dead_dependency_structures = false # Instead of trying to collapse in one step as many related changes as possible, show one # at a time. Default is false show_all_steps = false # Show superaccess links. Default is true show_superaccess_links = true # Choose whether to emit a table next to the graph with a description of the changes in # each frame. Default is false show_log = false [instrument.stats] # The outfile file for emitting the statistics. Default is the standard error output_file = "/dev/stderr" [instrument.verbose] # Output device or file for verbose log. Default is "/dev/stderr" output_file = "/dev/stderr" # Print timestamps on log. Default is true timestamps = true # Delay verbose output to prevent mixing with application output. Default is false dump_only_on_exit = false # Verbose log concepts to display. Possible values on README.md areas = ["all", "!ComputePlaceManagement", "!DependenciesByAccess", "!DependenciesByAccessLinks", "!DependenciesByGroup", "!LeaderThread", "!TaskStatus", "!ThreadManagement"] [memory] [misc] # Stack size of threads created by the runtime. Default is 8M stack_size = "8M" [loader] # Enable verbose output of the loader, to debug dynamic linking problems. Default is false verbose = false # Choose whether to print a warning when there is any invalid NANOS6 environment variables # defined when running a program. Default is true warn_envars = true # Path to the nanos6 libraries. Default is none # library_path = "path/to/nanos6/lib" # Prefix for the report printing all the runtime variables. Default is none # report_prefix = "#"