From 870727d6a514a5818caed6ac1637604b492ec05b Mon Sep 17 00:00:00 2001
From: Arthur Hennequin <arthur.hennequin@cern.ch>
Date: Wed, 26 Nov 2025 17:25:28 +0100
Subject: [PATCH 1/3] Use an explicit mask of missing modules instead of a
 seeding window

---
 .../python/RecoConf/legacy_rec_hlt1_tracking.py      | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/Hlt/RecoConf/python/RecoConf/legacy_rec_hlt1_tracking.py b/Hlt/RecoConf/python/RecoConf/legacy_rec_hlt1_tracking.py
index e49d502e31b..8620a85b824 100644
--- a/Hlt/RecoConf/python/RecoConf/legacy_rec_hlt1_tracking.py
+++ b/Hlt/RecoConf/python/RecoConf/legacy_rec_hlt1_tracking.py
@@ -78,6 +78,14 @@ def get_default_VeloClusterTracking_algorithm(use_full=False):
     return VeloClusterTrackingSIMD if not use_full else VeloClusterTrackingSIMDFull
 
 
+def missing_modules_bitmask(missing_modules):
+    bitmask = 0
+    for m in missing_modules:
+        if m >= 0 and m < 52:
+            bitmask |= 1 << (51 - m)
+    return bitmask
+
+
 @configurable
 def make_VeloClusterTrackingSIMD(
     algorithm=None,
@@ -87,7 +95,7 @@ def make_VeloClusterTrackingSIMD(
     MaxScatterForwarding=0.1,
     MaxScatter3hits=0.02,
     SkipForward=1,
-    SeedingWindow=4,
+    missing_modules=[],
     use_full=False,
 ):
     """Simple helper to make sure both, make_VeloClusterTrackingSIMD_tracks and make_VeloClusterTrackingSIMD_hits,
@@ -121,7 +129,7 @@ def make_VeloClusterTrackingSIMD(
         MaxScatterForwarding=MaxScatterForwarding,
         MaxScatter3hits=MaxScatter3hits,
         SkipForward=SkipForward,
-        SeedingWindow=SeedingWindow,
+        MissingModules=missing_modules_bitmask(missing_modules),
     )
 
 
-- 
GitLab


From c6e9bad43289cba5b5dcf2706afa1e44bc9be01b Mon Sep 17 00:00:00 2001
From: Arthur Hennequin <arthur.hennequin@cern.ch>
Date: Mon, 1 Dec 2025 10:26:30 +0100
Subject: [PATCH 2/3] Add back seeding window parameter

---
 Hlt/RecoConf/python/RecoConf/legacy_rec_hlt1_tracking.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Hlt/RecoConf/python/RecoConf/legacy_rec_hlt1_tracking.py b/Hlt/RecoConf/python/RecoConf/legacy_rec_hlt1_tracking.py
index 8620a85b824..3ae04b9249f 100644
--- a/Hlt/RecoConf/python/RecoConf/legacy_rec_hlt1_tracking.py
+++ b/Hlt/RecoConf/python/RecoConf/legacy_rec_hlt1_tracking.py
@@ -95,6 +95,7 @@ def make_VeloClusterTrackingSIMD(
     MaxScatterForwarding=0.1,
     MaxScatter3hits=0.02,
     SkipForward=1,
+    SeedingWindow=3,
     missing_modules=[],
     use_full=False,
 ):
@@ -129,6 +130,7 @@ def make_VeloClusterTrackingSIMD(
         MaxScatterForwarding=MaxScatterForwarding,
         MaxScatter3hits=MaxScatter3hits,
         SkipForward=SkipForward,
+        SeedingWindow=SeedingWindow,
         MissingModules=missing_modules_bitmask(missing_modules),
     )
 
-- 
GitLab


From b06b69f53e322b1c9816de9ba5261fb3d5b2cfaf Mon Sep 17 00:00:00 2001
From: Arthur Hennequin <arthur.hennequin@cern.ch>
Date: Mon, 1 Dec 2025 22:03:04 +0100
Subject: [PATCH 3/3] Reset SeedingWindow default to 4

---
 Hlt/RecoConf/python/RecoConf/legacy_rec_hlt1_tracking.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Hlt/RecoConf/python/RecoConf/legacy_rec_hlt1_tracking.py b/Hlt/RecoConf/python/RecoConf/legacy_rec_hlt1_tracking.py
index 3ae04b9249f..1d9f4cc7de3 100644
--- a/Hlt/RecoConf/python/RecoConf/legacy_rec_hlt1_tracking.py
+++ b/Hlt/RecoConf/python/RecoConf/legacy_rec_hlt1_tracking.py
@@ -95,7 +95,7 @@ def make_VeloClusterTrackingSIMD(
     MaxScatterForwarding=0.1,
     MaxScatter3hits=0.02,
     SkipForward=1,
-    SeedingWindow=3,
+    SeedingWindow=4,
     missing_modules=[],
     use_full=False,
 ):
-- 
GitLab