29 lines
807 B
Python
29 lines
807 B
Python
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"""Percent-busy of a core range over a short window.
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Two engines sharing cores measure the scheduler, not the engine, so every run
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in this directory records what else was on its cores before it started.
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"""
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import sys, time
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def snap():
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d = {}
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for line in open("/proc/stat"):
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if line.startswith("cpu") and line[3].isdigit():
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p = line.split()
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d[int(p[0][3:])] = (sum(map(int, p[1:])), int(p[4]))
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return d
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def busy(lo, hi, window=2.0):
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a = snap(); time.sleep(window); b = snap()
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tot = idle = 0
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for c in range(lo, hi + 1):
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tot += b[c][0] - a[c][0]
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idle += b[c][1] - a[c][1]
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return 100.0 * (1 - idle / max(tot, 1))
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if __name__ == "__main__":
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lo, hi = (int(x) for x in sys.argv[1].split("-"))
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print(f"{busy(lo, hi):.1f}")
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