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68 lines
1.6 KiB
68 lines
1.6 KiB
4 months ago
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#!/usr/bin/env python
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#
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# Usage:
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# scripts/throttle.py trace-dat
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#
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# Shows how often the trace throttles and for how long.
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import getopt
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from tracecmd import *
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import sys
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requests = {}
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throttle = {}
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prev_throttle = 0;
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def read_events(t):
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for cpu in range(0, t.cpus):
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e = t.read_event(cpu)
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while e:
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if e.name == 'i915_gem_request_complete':
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seqno = e.num_field('seqno')
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requests[seqno] = e.ts;
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if e.name == 'i915_gem_request_throttle_begin':
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seqno = e.num_field('seqno')
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throttle[seqno] = e.ts
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if e.name == 'i915_gem_request_throttle_end':
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global prev_throttle
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ts = 0
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sum_dispatch = 0
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num_dispatch = 0
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max_dispatch = 0
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seqno = e.num_field('seqno')
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s = prev_throttle
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if s == 0:
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s = seqno
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while s <= seqno:
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if requests.has_key(s):
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if ts:
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delta = requests[s] - ts
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num_dispatch += 1
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sum_dispatch += delta
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if delta > max_dispatch: max_dispatch = delta
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ts = requests[s]
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s += 1
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if throttle.has_key(seqno) and throttle.has_key(prev_throttle) and num_dispatch:
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print "throttle +%d: %dms -- %d dispatch, avg %.3fms, max %dus" % ((throttle[seqno]-throttle[prev_throttle])/1000000, (e.ts - throttle[seqno]) / 1000000, num_dispatch, sum_dispatch / (1000000. * num_dispatch), max_dispatch / 1000)
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throttle[seqno] = e.ts
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prev_throttle = seqno
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e = t.read_event(cpu)
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if __name__ == "__main__":
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if len(sys.argv) >=2:
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filename = sys.argv[1]
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else:
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filename = "trace.dat"
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print "Initializing trace '%s'..." % (filename)
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trace = Trace(filename)
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read_events(trace)
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