mirror of
https://github.com/logos-storage/constantine.git
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2931913b67
* Implement a threadpool * int and SomeUnsignedInt ... * Type conversion for windows SynchronizationBarrier * Use the latest MacOS 11, Big Sur API (jan 2021) for MacOS futexes, Github action offers MacOS 12 and can test them * bench need posix timer not available on windows and darwin futex * Windows: nimble exec empty line is an error, Mac: use defined(osx) instead of defined(macos) * file rename * okay, that's the last one hopefully * deactivate stealHalf for now
80 lines
2.1 KiB
Nim
80 lines
2.1 KiB
Nim
import
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# STD lib
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std/[os, strutils, cpuinfo, strformat, math],
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# Library
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../../threadpool
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when not defined(windows):
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# bench
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import ../wtime, ../resources
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var tp: Threadpool
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proc fib(n: int): int =
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# int64 on x86-64
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if n < 2:
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return n
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let x = tp.spawn fib(n-1)
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let y = fib(n-2)
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result = sync(x) + y
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proc main() =
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var n = 40
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var nthreads: int
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if paramCount() == 0:
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let exeName = getAppFilename().extractFilename()
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echo &"Usage: {exeName} <n-th fibonacci number requested:{n}> "
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echo &"Running with default n = {n}"
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elif paramCount() == 1:
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n = paramStr(1).parseInt
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else:
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let exeName = getAppFilename().extractFilename()
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echo &"Usage: {exeName} <n-th fibonacci number requested:{n}>"
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quit 1
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if existsEnv"CTT_NUM_THREADS":
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nthreads = getEnv"CTT_NUM_THREADS".parseInt()
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else:
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nthreads = countProcessors()
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tp = Threadpool.new()
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# measure overhead during tasking
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when not defined(windows):
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var ru: Rusage
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getrusage(RusageSelf, ru)
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var
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rss = ru.ru_maxrss
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flt = ru.ru_minflt
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let start = wtime_msec()
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let f = fib(n)
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when not defined(windows):
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let stop = wtime_msec()
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tp.shutdown()
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when not defined(windows):
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getrusage(RusageSelf, ru)
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rss = ru.ru_maxrss - rss
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flt = ru.ru_minflt - flt
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echo "--------------------------------------------------------------------------"
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echo "Scheduler: Constantine's Threadpool"
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echo "Benchmark: Fibonacci"
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echo "Threads: ", nthreads
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when not defined(windows):
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echo "Time(ms) ", round(stop - start, 3)
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echo "Max RSS (KB): ", ru.ru_maxrss
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echo "Runtime RSS (KB): ", rss
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echo "# of page faults: ", flt
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echo "--------------------------------------------------------------------------"
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echo "n requested: ", n
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echo "result: ", f
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main()
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