[PATCH] hwlatdetect: correctly get CPU number from different sample formats

[PATCH] hwlatdetect: correctly get CPU number from different sample formats

[Luis Claudio R. Goncalves]

Make hwlatdetect able to get the CPU number from samples in both
'nolatency-format' (currently covered by the code) and also from
samples in 'latency-format'.

With this change the code is now able to get the CPU from samples
in the following formats:

- nolatency-format:
   <...>-3820    [007] d.... 22851.463472: #2     inner/outer(us):    0/233   ts:1770937572.925294075 count:1
   <...>-3820    [011] d.... 22855.495526: #3     inner/outer(us):  308/305   ts:1770937576.805213360 count:49

- latency-format:
   <...>-3835     13d.... 12608167us : #2     inner/outer(us):  307/299   ts:1770937629.988530678 count:49
   <...>-3835     16d.... 15632212us : #3     inner/outer(us):  308/296   ts:1770937633.322710076 count:24

Fixes: 96e780938322 ("rt-tests: hwlatdetect: Add field cpu to samples output")
Signed-off-by: Luis Claudio R. Goncalves <lgoncalv@redhat.com>
---
 src/hwlatdetect/hwlatdetect.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/hwlatdetect/hwlatdetect.py b/src/hwlatdetect/hwlatdetect.py
index 68f312db639f..26694abe099a 100755
--- a/src/hwlatdetect/hwlatdetect.py
+++ b/src/hwlatdetect/hwlatdetect.py
@@ -246,7 +246,7 @@ class Tracer(Detector):
 
         def __init__(self, line):
             fields = line.split()
-            self.cpu = int(fields[1][1:-1])
+            self.cpu = int(fields[1][1:-1]) if fields[1][0] == '[' else int(fields[1][:-5])
             i, o = fields[6].split('/')
             ts = fields[7][3:]
             self.timestamp = str(ts)
-- 
2.53.0

Re: [PATCH] hwlatdetect: correctly get CPU number from different sample formats

[John Kacur]

On Fri, 13 Feb 2026, Luis Claudio R. Goncalves wrote:

> Make hwlatdetect able to get the CPU number from samples in both
> 'nolatency-format' (currently covered by the code) and also from
> samples in 'latency-format'.
> 
> With this change the code is now able to get the CPU from samples
> in the following formats:
> 
> - nolatency-format:
>    <...>-3820    [007] d.... 22851.463472: #2     inner/outer(us):    0/233   ts:1770937572.925294075 count:1
>    <...>-3820    [011] d.... 22855.495526: #3     inner/outer(us):  308/305   ts:1770937576.805213360 count:49
> 
> - latency-format:
>    <...>-3835     13d.... 12608167us : #2     inner/outer(us):  307/299   ts:1770937629.988530678 count:49
>    <...>-3835     16d.... 15632212us : #3     inner/outer(us):  308/296   ts:1770937633.322710076 count:24
> 
> Fixes: 96e780938322 ("rt-tests: hwlatdetect: Add field cpu to samples output")
> Signed-off-by: Luis Claudio R. Goncalves <lgoncalv@redhat.com>
> ---
>  src/hwlatdetect/hwlatdetect.py | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/src/hwlatdetect/hwlatdetect.py b/src/hwlatdetect/hwlatdetect.py
> index 68f312db639f..26694abe099a 100755
> --- a/src/hwlatdetect/hwlatdetect.py
> +++ b/src/hwlatdetect/hwlatdetect.py
> @@ -246,7 +246,7 @@ class Tracer(Detector):
>  
>          def __init__(self, line):
>              fields = line.split()
> -            self.cpu = int(fields[1][1:-1])
> +            self.cpu = int(fields[1][1:-1]) if fields[1][0] == '[' else int(fields[1][:-5])
>              i, o = fields[6].split('/')
>              ts = fields[7][3:]
>              self.timestamp = str(ts)
> -- 

Signed-off-by: John Kacur <jkacur@redhat.com>