37c93676b0
Added 3 patches and updated spec file Resolves: RHEL-144703 Signed-off-by: John Kacur <jkacur@redhat.com>
60 lines
2.4 KiB
Diff
60 lines
2.4 KiB
Diff
From 5ced2b87b184f773ae331021c1fa1cda85f43c44 Mon Sep 17 00:00:00 2001
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From: Costa Shulyupin <costa.shul@redhat.com>
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Date: Tue, 10 Mar 2026 01:09:18 +0200
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Subject: [PATCH 1/3] rt-tests: hwlatdetect: Add timestamp delta
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Add delta field that calculates the time interval between consecutive
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samples. For the first sample, the previous timestamp is initialized to
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'nan' (Not a Number), so the first delta is also 'nan'.
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This helps identify periodic issues during hardware latency testing.
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v2:
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Address John Kacur's review comments:
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- Use float('nan') instead of string 'nan' for prev initialization
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- Compute float(ts) once and reuse for delta calculation and prev update
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Signed-off-by: Costa Shulyupin <costa.shul@redhat.com>
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Signed-off-by: John Kacur <jkacur@redhat.com>
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---
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src/hwlatdetect/hwlatdetect.py | 11 +++++++----
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1 file changed, 7 insertions(+), 4 deletions(-)
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diff --git a/src/hwlatdetect/hwlatdetect.py b/src/hwlatdetect/hwlatdetect.py
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index 42b9f301718a..18ca930487f0 100755
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--- a/src/hwlatdetect/hwlatdetect.py
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+++ b/src/hwlatdetect/hwlatdetect.py
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@@ -253,7 +253,8 @@ class Tracer(Detector):
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class Sample:
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'private class for tracer sample data'
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- __slots__ = 'cpu', 'timestamp', 'inner', 'outer', 'count'
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+ __slots__ = 'cpu', 'timestamp', 'delta', 'inner', 'outer', 'count'
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+ prev = float('nan')
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def __init__(self, line):
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fields = line.split()
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@@ -276,14 +277,16 @@ class Tracer(Detector):
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i, o = fields[6].split('/')
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ts = fields[7][3:]
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self.timestamp = str(ts)
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+ ts_float = float(ts)
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+ self.delta = ts_float - self.__class__.prev
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+ self.__class__.prev = ts_float
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self.inner = int(i)
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self.outer = int(o)
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self.count = int(kv["count"]) if "count" in kv else None
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def __str__(self):
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- if self.count is not None:
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- return f"ts: {self.timestamp}, inner:{self.inner}, outer:{self.outer}, cpu:{self.cpu}, count:{self.count}"
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- return f"ts: {self.timestamp}, inner:{self.inner}, outer:{self.outer}, cpu:{self.cpu}"
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+ s = f"ts: {self.timestamp}, delta:{self.delta:.6f}, inner:{self.inner}, outer:{self.outer}, cpu:{self.cpu}"
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+ return s if self.count is None else s + f", count:{self.count}"
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def display(self):
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""" convert object to string and print """
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--
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2.53.0
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