Re: [PATCH RESEND v1] rt-tests: hwlatdetect: Add field count to samples output

On Thu, 16 Oct 2025, Costa Shulyupin wrote:

> Kernel commit b396bfdebffc ("tracing: Have hwlat ts be first instance
> and record count of instances") adds field `count`.
> 
> Add processing of `count` field to hwlatdetect.py.
> 
> Signed-off-by: Costa Shulyupin <[email protected]>
> ---
>  src/hwlatdetect/hwlatdetect.py | 19 ++++++++++++++++---
>  1 file changed, 16 insertions(+), 3 deletions(-)
> 
> diff --git a/src/hwlatdetect/hwlatdetect.py b/src/hwlatdetect/hwlatdetect.py
> index 68f312db639f..af9852cc95e8 100755
> --- a/src/hwlatdetect/hwlatdetect.py
> +++ b/src/hwlatdetect/hwlatdetect.py
> @@ -38,6 +38,17 @@
>      return ','.join([num_hex[max(i - 8, 0):i] for i in range(len(num_hex), 0, -8)][::-1])
>  
>  
> +def key_values(fields):
> +    """ Extract key:value pairs from a list of fields and return them as a dictionary """
> +    return {
> +        k: v
> +        for field in fields
> +            if ':' in field
> +                for k, v in [field.split(":", 1)]
> +                    if k and v
> +    }
> +
> +
>  #
>  # Class used to manage mounting and umounting the debugfs
>  # filesystem. Note that if an instance of this class mounts
> @@ -242,19 +253,21 @@     def detect(self):
>  
>      class Sample:
>          'private class for tracer sample data'
> -        __slots__ = 'cpu', 'timestamp', 'inner', 'outer'
> +        __slots__ = 'cpu', 'timestamp', 'inner', 'outer', 'count'
>  
>          def __init__(self, line):
>              fields = line.split()
> +            kv = key_values(fields)
>              self.cpu = int(fields[1][1:-1])
>              i, o = fields[6].split('/')
>              ts = fields[7][3:]
>              self.timestamp = str(ts)
>              self.inner = int(i)
>              self.outer = int(o)
> +            self.count = int(kv["count"])
>  
>          def __str__(self):
> -            return f"ts: {self.timestamp}, inner:{self.inner}, outer:{self.outer}, cpu:{self.cpu}"
> +            return f"ts: {self.timestamp}, inner:{self.inner}, outer:{self.outer}, cpu:{self.cpu}, count:{self.count}"
>  
>          def display(self):
>              """ convert object to string and print """
> @@ -286,7 +299,7 @@     def set(self, field, val):
>  
>      def get(self, field):
>          if field == "count":
> -            return len(self.samples)
> +            return sum(s.count for s in self.samples)
>          if field == "max":
>              max = 0
>              for values in self.samples:
> -- 
> 2.51.0
> 
> 
> 
Signed-off-by: John Kacur <[email protected]>