[PATCH] lib/i915/perf: Fix warning on codegen

[Gustavo Sousa]

Quoting Lucas De Marchi (2024-05-01 04:01:45-03:00)
>For a normal string, it's not correct to use just one backslash as
>escape char as that conflicts with Python's escape. Use raw strings for
>the regex patterns to avoid this problem. Fix the followin warnings:

s/followin/following/

Maybe it is worth noting from which Python version those warnings start
to appear?

>
>[4/1809] Generating lib/i915-perf-registers-hsw with a custom command
>/home/ldmartin/p/igt-gpu-tools/lib/i915/perf-configs/codegen.py:165: SyntaxWarning: invalid escape sequence '\$'
>  m = re.search('\$GtSlice([0-9]+)XeCore([0-9]+)$', name)
>/home/ldmartin/p/igt-gpu-tools/lib/i915/perf-configs/codegen.py:168: SyntaxWarning: invalid escape sequence '\$'
>  m = re.search('\$GtSlice([0-9]+)$', name)
>/home/ldmartin/p/igt-gpu-tools/lib/i915/perf-configs/codegen.py:171: SyntaxWarning: invalid escape sequence '\$'
>  m = re.search('\$GtSlice([0-9]+)DualSubslice([0-9]+)$', name)
>/home/ldmartin/p/igt-gpu-tools/lib/i915/perf-configs/codegen.py:341: SyntaxWarning: invalid escape sequence '\$'
>  m = re.search('\$GtSlice([0-9]+)$', name)
>/home/ldmartin/p/igt-gpu-tools/lib/i915/perf-configs/codegen.py:344: SyntaxWarning: invalid escape sequence '\$'
>  m = re.search('\$GtSlice([0-9]+)DualSubslice([0-9]+)$', name)
>/home/ldmartin/p/igt-gpu-tools/lib/i915/perf-configs/codegen.py:347: SyntaxWarning: invalid escape sequence '\$'
>  m = re.search('\$GtSlice([0-9]+)XeCore([0-9]+)$', name)
>
>Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>

Reviewed-by: Gustavo Sousa <gustavo.sousa at intel.com>

>---
> lib/i915/perf-configs/codegen.py | 12 ++++++------
> 1 file changed, 6 insertions(+), 6 deletions(-)
>
>diff --git a/lib/i915/perf-configs/codegen.py b/lib/i915/perf-configs/codegen.py
>index 020e76ef4..0d1847592 100644
>--- a/lib/i915/perf-configs/codegen.py
>+++ b/lib/i915/perf-configs/codegen.py
>@@ -162,13 +162,13 @@ hw_vars_mapping = {
> }
> 
> def is_hw_var(name):
>-    m = re.search('\$GtSlice([0-9]+)XeCore([0-9]+)$', name)
>+    m = re.search(r'\$GtSlice([0-9]+)XeCore([0-9]+)$', name)
>     if m:
>         return True
>-    m = re.search('\$GtSlice([0-9]+)$', name)
>+    m = re.search(r'\$GtSlice([0-9]+)$', name)
>     if m:
>         return True
>-    m = re.search('\$GtSlice([0-9]+)DualSubslice([0-9]+)$', name)
>+    m = re.search(r'\$GtSlice([0-9]+)DualSubslice([0-9]+)$', name)
>     if m:
>         return True
>     return name in hw_vars_mapping
>@@ -338,13 +338,13 @@ class Gen:
>             return self.hw_vars[name]['c']
>         if name in set.counter_vars:
>             return set.read_funcs[name] + "(perf, metric_set, accumulator)"
>-        m = re.search('\$GtSlice([0-9]+)$', name)
>+        m = re.search(r'\$GtSlice([0-9]+)$', name)
>         if m:
>             return 'intel_perf_devinfo_slice_available(&perf->devinfo, {0})'.format(m.group(1))
>-        m = re.search('\$GtSlice([0-9]+)DualSubslice([0-9]+)$', name)
>+        m = re.search(r'\$GtSlice([0-9]+)DualSubslice([0-9]+)$', name)
>         if m:
>             return 'intel_perf_devinfo_subslice_available(&perf->devinfo, {0}, {1})'.format(m.group(1), m.group(2))
>-        m = re.search('\$GtSlice([0-9]+)XeCore([0-9]+)$', name)
>+        m = re.search(r'\$GtSlice([0-9]+)XeCore([0-9]+)$', name)
>         if m:
>             return 'intel_perf_devinfo_subslice_available(&perf->devinfo, {0}, {1})'.format(m.group(1), m.group(2))
>         return None
>-- 
>2.45.0
>