From 80ce52e098b201d8823acbeb85547072101c3152 Mon Sep 17 00:00:00 2001
From: Sai Kiran Polisetty <spolisetty@nvidia.com>
Date: Mon, 1 Dec 2025 11:21:33 +0530
Subject: [PATCH 01/17] Update

---
 .../model_ready_check/check_model_ready.py    |  48 ++++++++
 .../model_ready_check/test.sh                 | 110 ++++++++++++++++++
 qa/L0_backend_python/test.sh                  |   2 +-
 3 files changed, 159 insertions(+), 1 deletion(-)
 create mode 100644 qa/L0_backend_python/model_ready_check/check_model_ready.py
 create mode 100644 qa/L0_backend_python/model_ready_check/test.sh

diff --git a/qa/L0_backend_python/model_ready_check/check_model_ready.py b/qa/L0_backend_python/model_ready_check/check_model_ready.py
new file mode 100644
index 0000000000..70dc5aac2d
--- /dev/null
+++ b/qa/L0_backend_python/model_ready_check/check_model_ready.py
@@ -0,0 +1,48 @@
+import unittest
+import tritonclient.http as httpclient
+import tritonclient.grpc as grpcclient
+
+class ModelReadyTest(unittest.TestCase):
+    def setUp(self):
+        self.model_name = "identity_fp32"
+        self.url_http = "localhost:8000"
+        self.url_grpc = "localhost:8001"
+        self.client_http = httpclient.InferenceServerClient(url=self.url_http)
+        self.client_grpc = grpcclient.InferenceServerClient(url=self.url_grpc)
+
+    def test_model_ready(self):
+        print(f"\nTesting if model '{self.model_name}' is READY ...")
+        
+        # Check HTTP
+        try:
+            is_ready = self.client_http.is_model_ready(self.model_name)
+            self.assertTrue(is_ready, f"[HTTP] Model {self.model_name} should be READY but is NOT")
+        except Exception as e:
+            self.fail(f"[HTTP] Unexpected error: {str(e)}")
+
+        # Check gRPC
+        try:
+            is_ready = self.client_grpc.is_model_ready(self.model_name)
+            self.assertTrue(is_ready, f"[gRPC] Model {self.model_name} should be READY but is NOT")
+        except Exception as e:
+            self.fail(f"[gRPC] Unexpected error: {str(e)}")
+
+    def test_model_not_ready(self):
+        print(f"\nTesting if model '{self.model_name}' is NOT READY ...")
+        
+        # Check HTTP
+        try:
+            is_ready = self.client_http.is_model_ready(self.model_name)
+            self.assertFalse(is_ready, f"[HTTP] Model {self.model_name} should be NOT READY but is READY.")
+        except Exception as e:
+            self.fail(f"[HTTP] Unexpected error: {str(e)}")
+
+        # Check gRPC
+        try:
+            is_ready = self.client_grpc.is_model_ready(self.model_name)
+            self.assertFalse(is_ready, f"[gRPC] Model {self.model_name} should be NOT READY but is READY")
+        except Exception as e:
+            self.fail(f"[gRPC] Unexpected error: {str(e)}")
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/qa/L0_backend_python/model_ready_check/test.sh b/qa/L0_backend_python/model_ready_check/test.sh
new file mode 100644
index 0000000000..9e7e53ebf6
--- /dev/null
+++ b/qa/L0_backend_python/model_ready_check/test.sh
@@ -0,0 +1,110 @@
+#!/bin/bash
+# Copyright 2025, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#  * Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+#  * Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#  * Neither the name of NVIDIA CORPORATION nor the names of its
+#    contributors may be used to endorse or promote products derived
+#    from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
+# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+# PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+# OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+CLIENT_LOG="./model_ready_check_client.log"
+TEST_RESULT_FILE='test_results.txt'
+source ../common.sh
+source ../../common/util.sh
+
+SERVER_ARGS="--model-repository=${MODELDIR}/model_ready_check/models --backend-directory=${BACKEND_DIR} --log-verbose=1"
+SERVER_LOG="./model_ready_check_server.log"
+
+RET=0
+rm -fr *.log ./models
+
+mkdir -p models/identity_fp32/1/
+cp ../../python_models/identity_fp32/model.py ./models/identity_fp32/1/model.py
+cp ../../python_models/identity_fp32/config.pbtxt ./models/identity_fp32/config.pbtxt
+
+#
+# Test Model Ready Check (TRITONBACKEND_ModelInstanceReady)
+# Test with different signals to simulate various crash/exit scenarios:
+# 11 (SIGSEGV) - Segmentation fault / crash
+# 9  (SIGKILL) - Force kill
+#
+for SIGNAL in 11 9; do
+    echo "----------------------------------------------------------------"
+    echo "Testing Model Ready Check with Signal $SIGNAL"
+    echo "----------------------------------------------------------------"
+
+    run_server
+    if [ "$SERVER_PID" == "0" ]; then
+        cat $SERVER_LOG
+        echo -e "\n***\n*** Failed to start $SERVER\n***"
+        exit 1
+    fi
+
+    set +e
+
+    # 1. Verify model is initially ready    
+    echo "Checking Initial Readiness..."
+    python3 -m unittest check_model_ready.ModelReadyTest.test_model_ready
+    if [ $? -ne 0 ]; then
+        echo -e "\n***\n*** Model Ready Check Failed (Signal $SIGNAL): Initial readiness check failed \n***"
+        RET=1
+        kill_server
+        exit 1
+    fi
+
+    # 2. Find the stub process PID
+    stub_pid=$(pgrep -f "triton_python_backend_stub*")
+    
+    if [ -z "$stub_pid" ]; then
+        echo -e "\n***\n*** Model Ready Check Failed (Signal $SIGNAL): Could not find stub process \n***"
+        RET=1
+        kill_server
+    else
+        echo "Found stub process: $stub_pid"
+
+        # 3. Kill the stub process
+        echo "Killing stub with signal $SIGNAL..."
+        kill -$SIGNAL $stub_pid
+        sleep 1
+
+        # 4. Verify model is now NOT ready
+        echo "Checking Not Ready Status..."
+        python3 -m unittest check_model_ready.ModelReadyTest.test_model_not_ready
+        if [ $? -ne 0 ]; then
+            echo -e "\n***\n*** Model Ready Check Failed (Signal $SIGNAL): Model reported ready after kill \n***"
+            RET=1
+        else
+            echo "***\n  Model Ready Check Passed for Signal $SIGNAL"
+        fi
+    fi
+
+    set -e
+    kill_server
+done
+
+if [ $RET -eq 0 ]; then
+  echo -e "\n***\n*** Test Passed\n***"
+else
+  echo -e "\n***\n*** Test FAILED\n***"
+fi
+
+exit $RET
+
diff --git a/qa/L0_backend_python/test.sh b/qa/L0_backend_python/test.sh
index 58b92590e1..7edcb41906 100755
--- a/qa/L0_backend_python/test.sh
+++ b/qa/L0_backend_python/test.sh
@@ -522,7 +522,7 @@ SUBTESTS="lifecycle argument_validation logging custom_metrics parameters"
 # [DLIS-6123] Disable examples test for Windows since it requires updates to the example clients
 if [[ ${TEST_WINDOWS} == 0 ]]; then
     # TODO: Reimplement restart on decoupled data pipeline and enable restart.
-    SUBTESTS+=" model_control examples request_rescheduling"
+    SUBTESTS+=" model_control examples request_rescheduling model_ready_check"
 fi
 for TEST in ${SUBTESTS}; do
     # Run each subtest in a separate virtual environment to avoid conflicts

From 748feba3cdf2648fee8505de59adb91c504b86e8 Mon Sep 17 00:00:00 2001
From: Sai Kiran Polisetty <spolisetty@nvidia.com>
Date: Tue, 2 Dec 2025 15:39:34 +0530
Subject: [PATCH 02/17] Fix pre-commit

---
 .../model_ready_check/check_model_ready.py    | 54 ++++++++++++++++---
 .../model_ready_check/test.sh                 |  2 +-
 2 files changed, 48 insertions(+), 8 deletions(-)

diff --git a/qa/L0_backend_python/model_ready_check/check_model_ready.py b/qa/L0_backend_python/model_ready_check/check_model_ready.py
index 70dc5aac2d..88313979b9 100644
--- a/qa/L0_backend_python/model_ready_check/check_model_ready.py
+++ b/qa/L0_backend_python/model_ready_check/check_model_ready.py
@@ -1,6 +1,35 @@
+#!/bin/bash
+# Copyright 2025, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#  * Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+#  * Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#  * Neither the name of NVIDIA CORPORATION nor the names of its
+#    contributors may be used to endorse or promote products derived
+#    from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
+# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+# PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+# OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
 import unittest
-import tritonclient.http as httpclient
+
 import tritonclient.grpc as grpcclient
+import tritonclient.http as httpclient
+
 
 class ModelReadyTest(unittest.TestCase):
     def setUp(self):
@@ -12,37 +41,48 @@ def setUp(self):
 
     def test_model_ready(self):
         print(f"\nTesting if model '{self.model_name}' is READY ...")
-        
+
         # Check HTTP
         try:
             is_ready = self.client_http.is_model_ready(self.model_name)
-            self.assertTrue(is_ready, f"[HTTP] Model {self.model_name} should be READY but is NOT")
+            self.assertTrue(
+                is_ready, f"[HTTP] Model {self.model_name} should be READY but is NOT"
+            )
         except Exception as e:
             self.fail(f"[HTTP] Unexpected error: {str(e)}")
 
         # Check gRPC
         try:
             is_ready = self.client_grpc.is_model_ready(self.model_name)
-            self.assertTrue(is_ready, f"[gRPC] Model {self.model_name} should be READY but is NOT")
+            self.assertTrue(
+                is_ready, f"[gRPC] Model {self.model_name} should be READY but is NOT"
+            )
         except Exception as e:
             self.fail(f"[gRPC] Unexpected error: {str(e)}")
 
     def test_model_not_ready(self):
         print(f"\nTesting if model '{self.model_name}' is NOT READY ...")
-        
+
         # Check HTTP
         try:
             is_ready = self.client_http.is_model_ready(self.model_name)
-            self.assertFalse(is_ready, f"[HTTP] Model {self.model_name} should be NOT READY but is READY.")
+            self.assertFalse(
+                is_ready,
+                f"[HTTP] Model {self.model_name} should be NOT READY but is READY.",
+            )
         except Exception as e:
             self.fail(f"[HTTP] Unexpected error: {str(e)}")
 
         # Check gRPC
         try:
             is_ready = self.client_grpc.is_model_ready(self.model_name)
-            self.assertFalse(is_ready, f"[gRPC] Model {self.model_name} should be NOT READY but is READY")
+            self.assertFalse(
+                is_ready,
+                f"[gRPC] Model {self.model_name} should be NOT READY but is READY",
+            )
         except Exception as e:
             self.fail(f"[gRPC] Unexpected error: {str(e)}")
 
+
 if __name__ == "__main__":
     unittest.main()
diff --git a/qa/L0_backend_python/model_ready_check/test.sh b/qa/L0_backend_python/model_ready_check/test.sh
index 9e7e53ebf6..67c2784dce 100644
--- a/qa/L0_backend_python/model_ready_check/test.sh
+++ b/qa/L0_backend_python/model_ready_check/test.sh
@@ -60,7 +60,7 @@ for SIGNAL in 11 9; do
 
     set +e
 
-    # 1. Verify model is initially ready    
+    # 1. Verify model is initially ready
     echo "Checking Initial Readiness..."
     python3 -m unittest check_model_ready.ModelReadyTest.test_model_ready
     if [ $? -ne 0 ]; then

From 0f998e59bfe05a0685688986df52e33ed35c19d0 Mon Sep 17 00:00:00 2001
From: Sai Kiran Polisetty <spolisetty@nvidia.com>
Date: Tue, 2 Dec 2025 21:46:46 +0530
Subject: [PATCH 03/17] Update

---
 qa/L0_backend_python/model_ready_check/test.sh | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/qa/L0_backend_python/model_ready_check/test.sh b/qa/L0_backend_python/model_ready_check/test.sh
index 67c2784dce..540a0faa84 100644
--- a/qa/L0_backend_python/model_ready_check/test.sh
+++ b/qa/L0_backend_python/model_ready_check/test.sh
@@ -42,14 +42,11 @@ cp ../../python_models/identity_fp32/config.pbtxt ./models/identity_fp32/config.
 
 #
 # Test Model Ready Check (TRITONBACKEND_ModelInstanceReady)
-# Test with different signals to simulate various crash/exit scenarios:
+# Test with different signals to simulate various crash/exit scenarios
 # 11 (SIGSEGV) - Segmentation fault / crash
 # 9  (SIGKILL) - Force kill
-#
 for SIGNAL in 11 9; do
-    echo "----------------------------------------------------------------"
-    echo "Testing Model Ready Check with Signal $SIGNAL"
-    echo "----------------------------------------------------------------"
+    echo -e "\n***\n*** Testing Model Ready Check with Signal $SIGNAL\n***"
 
     run_server
     if [ "$SERVER_PID" == "0" ]; then
@@ -72,7 +69,7 @@ for SIGNAL in 11 9; do
 
     # 2. Find the stub process PID
     stub_pid=$(pgrep -f "triton_python_backend_stub*")
-    
+
     if [ -z "$stub_pid" ]; then
         echo -e "\n***\n*** Model Ready Check Failed (Signal $SIGNAL): Could not find stub process \n***"
         RET=1

From 59b5be241cc9d1104d74ab390b5f139cd632c71c Mon Sep 17 00:00:00 2001
From: Sai Kiran Polisetty <spolisetty@nvidia.com>
Date: Tue, 2 Dec 2025 21:49:50 +0530
Subject: [PATCH 04/17] Fix pre-commit

---
 qa/L0_backend_python/model_ready_check/check_model_ready.py | 0
 qa/L0_backend_python/model_ready_check/test.sh              | 0
 2 files changed, 0 insertions(+), 0 deletions(-)
 mode change 100644 => 100755 qa/L0_backend_python/model_ready_check/check_model_ready.py
 mode change 100644 => 100755 qa/L0_backend_python/model_ready_check/test.sh

diff --git a/qa/L0_backend_python/model_ready_check/check_model_ready.py b/qa/L0_backend_python/model_ready_check/check_model_ready.py
old mode 100644
new mode 100755
diff --git a/qa/L0_backend_python/model_ready_check/test.sh b/qa/L0_backend_python/model_ready_check/test.sh
old mode 100644
new mode 100755

From 0194ef64ebe2fb14a8089020a066974dc25e3f61 Mon Sep 17 00:00:00 2001
From: Sai Kiran Polisetty <spolisetty@nvidia.com>
Date: Tue, 2 Dec 2025 21:57:02 +0530
Subject: [PATCH 05/17] Update
 qa/L0_backend_python/model_ready_check/check_model_ready.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
---
 qa/L0_backend_python/model_ready_check/check_model_ready.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/qa/L0_backend_python/model_ready_check/check_model_ready.py b/qa/L0_backend_python/model_ready_check/check_model_ready.py
index 88313979b9..f93dcfce73 100755
--- a/qa/L0_backend_python/model_ready_check/check_model_ready.py
+++ b/qa/L0_backend_python/model_ready_check/check_model_ready.py
@@ -1,4 +1,3 @@
-#!/bin/bash
 # Copyright 2025, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without

From d4b929a77e766c6fbe799fe43ee924a9fd853bfb Mon Sep 17 00:00:00 2001
From: Sai Kiran Polisetty <spolisetty@nvidia.com>
Date: Tue, 2 Dec 2025 21:57:44 +0530
Subject: [PATCH 06/17] Update
 qa/L0_backend_python/model_ready_check/check_model_ready.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
---
 qa/L0_backend_python/model_ready_check/check_model_ready.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/qa/L0_backend_python/model_ready_check/check_model_ready.py b/qa/L0_backend_python/model_ready_check/check_model_ready.py
index f93dcfce73..d73606aeb2 100755
--- a/qa/L0_backend_python/model_ready_check/check_model_ready.py
+++ b/qa/L0_backend_python/model_ready_check/check_model_ready.py
@@ -77,7 +77,7 @@ def test_model_not_ready(self):
             is_ready = self.client_grpc.is_model_ready(self.model_name)
             self.assertFalse(
                 is_ready,
-                f"[gRPC] Model {self.model_name} should be NOT READY but is READY",
+                f"[gRPC] Model {self.model_name} should be NOT READY but is READY.",
             )
         except Exception as e:
             self.fail(f"[gRPC] Unexpected error: {str(e)}")

From b04956f6cad6f86b532698d44fdb73d1a46a5992 Mon Sep 17 00:00:00 2001
From: Sai Kiran Polisetty <spolisetty@nvidia.com>
Date: Tue, 2 Dec 2025 21:57:52 +0530
Subject: [PATCH 07/17] Update
 qa/L0_backend_python/model_ready_check/check_model_ready.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
---
 qa/L0_backend_python/model_ready_check/check_model_ready.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/qa/L0_backend_python/model_ready_check/check_model_ready.py b/qa/L0_backend_python/model_ready_check/check_model_ready.py
index d73606aeb2..e27ac277ef 100755
--- a/qa/L0_backend_python/model_ready_check/check_model_ready.py
+++ b/qa/L0_backend_python/model_ready_check/check_model_ready.py
@@ -67,7 +67,7 @@ def test_model_not_ready(self):
             is_ready = self.client_http.is_model_ready(self.model_name)
             self.assertFalse(
                 is_ready,
-                f"[HTTP] Model {self.model_name} should be NOT READY but is READY.",
+                f"[HTTP] Model {self.model_name} should be NOT READY but is READY",
             )
         except Exception as e:
             self.fail(f"[HTTP] Unexpected error: {str(e)}")

From a563c53c066538bbf631f6483a3a8cb42a1fd1bc Mon Sep 17 00:00:00 2001
From: Sai Kiran Polisetty <spolisetty@nvidia.com>
Date: Tue, 2 Dec 2025 21:58:03 +0530
Subject: [PATCH 08/17] Update qa/L0_backend_python/model_ready_check/test.sh

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
---
 qa/L0_backend_python/model_ready_check/test.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/qa/L0_backend_python/model_ready_check/test.sh b/qa/L0_backend_python/model_ready_check/test.sh
index 540a0faa84..2bf8db7210 100755
--- a/qa/L0_backend_python/model_ready_check/test.sh
+++ b/qa/L0_backend_python/model_ready_check/test.sh
@@ -89,7 +89,7 @@ for SIGNAL in 11 9; do
             echo -e "\n***\n*** Model Ready Check Failed (Signal $SIGNAL): Model reported ready after kill \n***"
             RET=1
         else
-            echo "***\n  Model Ready Check Passed for Signal $SIGNAL"
+            echo -e "\n***\n  Model Ready Check Passed for Signal $SIGNAL"
         fi
     fi
 

From 65cd1eb6a7eec77fabd2c46ab210cf955f162e6c Mon Sep 17 00:00:00 2001
From: Sai Kiran Polisetty <spolisetty@nvidia.com>
Date: Tue, 2 Dec 2025 21:58:36 +0530
Subject: [PATCH 09/17] Update qa/L0_backend_python/model_ready_check/test.sh

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
---
 qa/L0_backend_python/model_ready_check/test.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/qa/L0_backend_python/model_ready_check/test.sh b/qa/L0_backend_python/model_ready_check/test.sh
index 2bf8db7210..78152a5556 100755
--- a/qa/L0_backend_python/model_ready_check/test.sh
+++ b/qa/L0_backend_python/model_ready_check/test.sh
@@ -68,7 +68,7 @@ for SIGNAL in 11 9; do
     fi
 
     # 2. Find the stub process PID
-    stub_pid=$(pgrep -f "triton_python_backend_stub*")
+    stub_pid=$(pgrep -f "triton_python_backend_stub")
 
     if [ -z "$stub_pid" ]; then
         echo -e "\n***\n*** Model Ready Check Failed (Signal $SIGNAL): Could not find stub process \n***"

From f262812de400c2d3b874e4848ea5290f0fca5db7 Mon Sep 17 00:00:00 2001
From: Sai Kiran Polisetty <spolisetty@nvidia.com>
Date: Tue, 2 Dec 2025 22:01:57 +0530
Subject: [PATCH 10/17] Update

---
 qa/L0_backend_python/model_ready_check/check_model_ready.py | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 mode change 100755 => 100644 qa/L0_backend_python/model_ready_check/check_model_ready.py

diff --git a/qa/L0_backend_python/model_ready_check/check_model_ready.py b/qa/L0_backend_python/model_ready_check/check_model_ready.py
old mode 100755
new mode 100644

From 7c1ac8178950a4fbd380d5d88644832bca6e40e8 Mon Sep 17 00:00:00 2001
From: Sai Kiran Polisetty <spolisetty@nvidia.com>
Date: Fri, 5 Dec 2025 21:21:52 +0530
Subject: [PATCH 11/17] Update

---
 .../model_ready_check/test.sh                 | 24 ++++++++++++-------
 1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/qa/L0_backend_python/model_ready_check/test.sh b/qa/L0_backend_python/model_ready_check/test.sh
index 78152a5556..1538d6e1df 100755
--- a/qa/L0_backend_python/model_ready_check/test.sh
+++ b/qa/L0_backend_python/model_ready_check/test.sh
@@ -25,20 +25,19 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-CLIENT_LOG="./model_ready_check_client.log"
 TEST_RESULT_FILE='test_results.txt'
 source ../common.sh
 source ../../common/util.sh
 
 SERVER_ARGS="--model-repository=${MODELDIR}/model_ready_check/models --backend-directory=${BACKEND_DIR} --log-verbose=1"
-SERVER_LOG="./model_ready_check_server.log"
 
 RET=0
 rm -fr *.log ./models
 
-mkdir -p models/identity_fp32/1/
-cp ../../python_models/identity_fp32/model.py ./models/identity_fp32/1/model.py
-cp ../../python_models/identity_fp32/config.pbtxt ./models/identity_fp32/config.pbtxt
+MODEL_NAME="identity_fp32"
+mkdir -p models/$MODEL_NAME/1/
+cp ../../python_models/$MODEL_NAME/model.py ./models/$MODEL_NAME/1/model.py
+cp ../../python_models/$MODEL_NAME/config.pbtxt ./models/$MODEL_NAME/config.pbtxt
 
 #
 # Test Model Ready Check (TRITONBACKEND_ModelInstanceReady)
@@ -47,6 +46,8 @@ cp ../../python_models/identity_fp32/config.pbtxt ./models/identity_fp32/config.
 # 9  (SIGKILL) - Force kill
 for SIGNAL in 11 9; do
     echo -e "\n***\n*** Testing Model Ready Check with Signal $SIGNAL\n***"
+    SERVER_LOG="./model_ready_check_signal_${SIGNAL}_server.log"
+    CLIENT_LOG="./model_ready_check_${SIGNAL}_client.log"
 
     run_server
     if [ "$SERVER_PID" == "0" ]; then
@@ -59,7 +60,7 @@ for SIGNAL in 11 9; do
 
     # 1. Verify model is initially ready
     echo "Checking Initial Readiness..."
-    python3 -m unittest check_model_ready.ModelReadyTest.test_model_ready
+    python3 -m unittest check_model_ready.ModelReadyTest.test_model_ready >> ${CLIENT_LOG} 2>&1
     if [ $? -ne 0 ]; then
         echo -e "\n***\n*** Model Ready Check Failed (Signal $SIGNAL): Initial readiness check failed \n***"
         RET=1
@@ -84,12 +85,19 @@ for SIGNAL in 11 9; do
 
         # 4. Verify model is now NOT ready
         echo "Checking Not Ready Status..."
-        python3 -m unittest check_model_ready.ModelReadyTest.test_model_not_ready
+        python3 -m unittest check_model_ready.ModelReadyTest.test_model_not_ready >> ${CLIENT_LOG} 2>&1
         if [ $? -ne 0 ]; then
             echo -e "\n***\n*** Model Ready Check Failed (Signal $SIGNAL): Model reported ready after kill \n***"
             RET=1
         else
-            echo -e "\n***\n  Model Ready Check Passed for Signal $SIGNAL"
+            # 5. Verify correct error message in logs
+            if grep -q "Stub process '${MODEL_NAME}_0_0' is not alive" $SERVER_LOG; then
+                 echo -e "\n***\n  Model Ready Check Passed for Signal $SIGNAL \n***"
+            else
+                 echo -e "\n***\n*** Model Ready Check Failed (Signal $SIGNAL): Expected error message not found in the server logs \n***"
+                 cat $SERVER_LOG
+                 RET=1
+            fi
         fi
     fi
 

From 25072c1dea086143fc4e6a9cb8e02836ddff30db Mon Sep 17 00:00:00 2001
From: Sai Kiran Polisetty <spolisetty@nvidia.com>
Date: Fri, 5 Dec 2025 22:05:13 +0530
Subject: [PATCH 12/17] Update test

---
 .../model_ready_check/test.sh                 | 26 ++++++++++---------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/qa/L0_backend_python/model_ready_check/test.sh b/qa/L0_backend_python/model_ready_check/test.sh
index 1538d6e1df..3559b849f3 100755
--- a/qa/L0_backend_python/model_ready_check/test.sh
+++ b/qa/L0_backend_python/model_ready_check/test.sh
@@ -45,7 +45,7 @@ cp ../../python_models/$MODEL_NAME/config.pbtxt ./models/$MODEL_NAME/config.pbtx
 # 11 (SIGSEGV) - Segmentation fault / crash
 # 9  (SIGKILL) - Force kill
 for SIGNAL in 11 9; do
-    echo -e "\n***\n*** Testing Model Ready Check with Signal $SIGNAL\n***"
+    echo -e "\n***\n*** Testing model_ready_check with Signal $SIGNAL\n***"
     SERVER_LOG="./model_ready_check_signal_${SIGNAL}_server.log"
     CLIENT_LOG="./model_ready_check_${SIGNAL}_client.log"
 
@@ -58,43 +58,45 @@ for SIGNAL in 11 9; do
 
     set +e
 
-    # 1. Verify model is initially ready
+    # Verify model is initially ready
     echo "Checking Initial Readiness..."
     python3 -m unittest check_model_ready.ModelReadyTest.test_model_ready >> ${CLIENT_LOG} 2>&1
     if [ $? -ne 0 ]; then
-        echo -e "\n***\n*** Model Ready Check Failed (Signal $SIGNAL): Initial readiness check failed \n***"
+        echo -e "\n***\n*** Test model_ready_check Failed (Signal $SIGNAL): Initial readiness check failed \n***"
         RET=1
         kill_server
         exit 1
     fi
 
-    # 2. Find the stub process PID
+    # Find the stub process PID
     stub_pid=$(pgrep -f "triton_python_backend_stub")
 
     if [ -z "$stub_pid" ]; then
-        echo -e "\n***\n*** Model Ready Check Failed (Signal $SIGNAL): Could not find stub process \n***"
+        echo -e "\n***\n*** Test model_ready_check Failed (Signal $SIGNAL): Could not find stub process \n***"
         RET=1
         kill_server
     else
         echo "Found stub process: $stub_pid"
 
-        # 3. Kill the stub process
+        # Kill the stub process
         echo "Killing stub with signal $SIGNAL..."
         kill -$SIGNAL $stub_pid
         sleep 1
 
-        # 4. Verify model is now NOT ready
+        # Verify model is now NOT ready
         echo "Checking Not Ready Status..."
         python3 -m unittest check_model_ready.ModelReadyTest.test_model_not_ready >> ${CLIENT_LOG} 2>&1
         if [ $? -ne 0 ]; then
-            echo -e "\n***\n*** Model Ready Check Failed (Signal $SIGNAL): Model reported ready after kill \n***"
+            echo -e "\n***\n*** Test model_ready_check Failed (Signal $SIGNAL): Model reported ready after kill \n***"
             RET=1
         else
-            # 5. Verify correct error message in logs
-            if grep -q "Stub process '${MODEL_NAME}_0_0' is not alive" $SERVER_LOG; then
-                 echo -e "\n***\n  Model Ready Check Passed for Signal $SIGNAL \n***"
+            # Verify correct error message in logs
+            # Expect 2 occurrences: HTTP and gRPC checks
+            error_count=$(grep -c "Model '${MODEL_NAME}' version 1 is not ready: Stub process '${MODEL_NAME}_0_0' is not healthy." $SERVER_LOG)
+            if [ "$error_count" -eq 2 ]; then
+                 echo -e "\n***\n Test model_ready_check Passed for Signal $SIGNAL \n***"
             else
-                 echo -e "\n***\n*** Model Ready Check Failed (Signal $SIGNAL): Expected error message not found in the server logs \n***"
+                 echo -e "\n***\n*** Test model_ready_check Failed (Signal $SIGNAL): Expected 2 error messages, found $error_count \n***"
                  cat $SERVER_LOG
                  RET=1
             fi

From 0b29cb433aa0124f146de2e67a5fe80d2f3e8fe2 Mon Sep 17 00:00:00 2001
From: Sai Kiran Polisetty <spolisetty@nvidia.com>
Date: Mon, 8 Dec 2025 14:00:59 +0530
Subject: [PATCH 13/17] Update test name

---
 .../check_model_ready.py                       |  0
 .../test.sh                                    | 18 +++++++++---------
 qa/L0_backend_python/test.sh                   |  2 +-
 3 files changed, 10 insertions(+), 10 deletions(-)
 rename qa/L0_backend_python/{model_ready_check => model_readiness}/check_model_ready.py (100%)
 rename qa/L0_backend_python/{model_ready_check => model_readiness}/test.sh (80%)
 mode change 100755 => 100644

diff --git a/qa/L0_backend_python/model_ready_check/check_model_ready.py b/qa/L0_backend_python/model_readiness/check_model_ready.py
similarity index 100%
rename from qa/L0_backend_python/model_ready_check/check_model_ready.py
rename to qa/L0_backend_python/model_readiness/check_model_ready.py
diff --git a/qa/L0_backend_python/model_ready_check/test.sh b/qa/L0_backend_python/model_readiness/test.sh
old mode 100755
new mode 100644
similarity index 80%
rename from qa/L0_backend_python/model_ready_check/test.sh
rename to qa/L0_backend_python/model_readiness/test.sh
index 3559b849f3..e3ba5dda3d
--- a/qa/L0_backend_python/model_ready_check/test.sh
+++ b/qa/L0_backend_python/model_readiness/test.sh
@@ -29,7 +29,7 @@ TEST_RESULT_FILE='test_results.txt'
 source ../common.sh
 source ../../common/util.sh
 
-SERVER_ARGS="--model-repository=${MODELDIR}/model_ready_check/models --backend-directory=${BACKEND_DIR} --log-verbose=1"
+SERVER_ARGS="--model-repository=${MODELDIR}/model_readiness/models --backend-directory=${BACKEND_DIR} --log-verbose=1"
 
 RET=0
 rm -fr *.log ./models
@@ -45,9 +45,9 @@ cp ../../python_models/$MODEL_NAME/config.pbtxt ./models/$MODEL_NAME/config.pbtx
 # 11 (SIGSEGV) - Segmentation fault / crash
 # 9  (SIGKILL) - Force kill
 for SIGNAL in 11 9; do
-    echo -e "\n***\n*** Testing model_ready_check with Signal $SIGNAL\n***"
-    SERVER_LOG="./model_ready_check_signal_${SIGNAL}_server.log"
-    CLIENT_LOG="./model_ready_check_${SIGNAL}_client.log"
+    echo -e "\n***\n*** Testing model_readiness with Signal $SIGNAL\n***"
+    SERVER_LOG="./model_readiness_signal_${SIGNAL}_server.log"
+    CLIENT_LOG="./model_readiness_${SIGNAL}_client.log"
 
     run_server
     if [ "$SERVER_PID" == "0" ]; then
@@ -62,7 +62,7 @@ for SIGNAL in 11 9; do
     echo "Checking Initial Readiness..."
     python3 -m unittest check_model_ready.ModelReadyTest.test_model_ready >> ${CLIENT_LOG} 2>&1
     if [ $? -ne 0 ]; then
-        echo -e "\n***\n*** Test model_ready_check Failed (Signal $SIGNAL): Initial readiness check failed \n***"
+        echo -e "\n***\n*** Test model_readiness Failed (Signal $SIGNAL): Initial readiness check failed \n***"
         RET=1
         kill_server
         exit 1
@@ -72,7 +72,7 @@ for SIGNAL in 11 9; do
     stub_pid=$(pgrep -f "triton_python_backend_stub")
 
     if [ -z "$stub_pid" ]; then
-        echo -e "\n***\n*** Test model_ready_check Failed (Signal $SIGNAL): Could not find stub process \n***"
+        echo -e "\n***\n*** Test model_readiness Failed (Signal $SIGNAL): Could not find stub process \n***"
         RET=1
         kill_server
     else
@@ -87,16 +87,16 @@ for SIGNAL in 11 9; do
         echo "Checking Not Ready Status..."
         python3 -m unittest check_model_ready.ModelReadyTest.test_model_not_ready >> ${CLIENT_LOG} 2>&1
         if [ $? -ne 0 ]; then
-            echo -e "\n***\n*** Test model_ready_check Failed (Signal $SIGNAL): Model reported ready after kill \n***"
+            echo -e "\n***\n*** Test model_readiness Failed (Signal $SIGNAL): Model reported ready after kill \n***"
             RET=1
         else
             # Verify correct error message in logs
             # Expect 2 occurrences: HTTP and gRPC checks
             error_count=$(grep -c "Model '${MODEL_NAME}' version 1 is not ready: Stub process '${MODEL_NAME}_0_0' is not healthy." $SERVER_LOG)
             if [ "$error_count" -eq 2 ]; then
-                 echo -e "\n***\n Test model_ready_check Passed for Signal $SIGNAL \n***"
+                 echo -e "\n***\n Test model_readiness Passed for Signal $SIGNAL \n***"
             else
-                 echo -e "\n***\n*** Test model_ready_check Failed (Signal $SIGNAL): Expected 2 error messages, found $error_count \n***"
+                 echo -e "\n***\n*** Test model_readiness Failed (Signal $SIGNAL): Expected 2 error messages, found $error_count \n***"
                  cat $SERVER_LOG
                  RET=1
             fi
diff --git a/qa/L0_backend_python/test.sh b/qa/L0_backend_python/test.sh
index 7edcb41906..73e825ebf2 100755
--- a/qa/L0_backend_python/test.sh
+++ b/qa/L0_backend_python/test.sh
@@ -522,7 +522,7 @@ SUBTESTS="lifecycle argument_validation logging custom_metrics parameters"
 # [DLIS-6123] Disable examples test for Windows since it requires updates to the example clients
 if [[ ${TEST_WINDOWS} == 0 ]]; then
     # TODO: Reimplement restart on decoupled data pipeline and enable restart.
-    SUBTESTS+=" model_control examples request_rescheduling model_ready_check"
+    SUBTESTS+=" model_control examples request_rescheduling model_readiness"
 fi
 for TEST in ${SUBTESTS}; do
     # Run each subtest in a separate virtual environment to avoid conflicts

From e525825fcd0f4e396be50ba751b7265cd7981197 Mon Sep 17 00:00:00 2001
From: Sai Kiran Polisetty <spolisetty@nvidia.com>
Date: Mon, 8 Dec 2025 14:13:42 +0530
Subject: [PATCH 14/17] Update test name

---
 qa/L0_backend_python/model_readiness/test.sh                | 4 ++--
 .../{check_model_ready.py => test_model_readiness.py}       | 6 +++---
 2 files changed, 5 insertions(+), 5 deletions(-)
 mode change 100644 => 100755 qa/L0_backend_python/model_readiness/test.sh
 rename qa/L0_backend_python/model_readiness/{check_model_ready.py => test_model_readiness.py} (96%)
 mode change 100644 => 100755

diff --git a/qa/L0_backend_python/model_readiness/test.sh b/qa/L0_backend_python/model_readiness/test.sh
old mode 100644
new mode 100755
index e3ba5dda3d..979d43e24b
--- a/qa/L0_backend_python/model_readiness/test.sh
+++ b/qa/L0_backend_python/model_readiness/test.sh
@@ -60,7 +60,7 @@ for SIGNAL in 11 9; do
 
     # Verify model is initially ready
     echo "Checking Initial Readiness..."
-    python3 -m unittest check_model_ready.ModelReadyTest.test_model_ready >> ${CLIENT_LOG} 2>&1
+    python3 -m unittest test_model_readiness.ModelReadinessTest.test_is_model_ready >> ${CLIENT_LOG} 2>&1
     if [ $? -ne 0 ]; then
         echo -e "\n***\n*** Test model_readiness Failed (Signal $SIGNAL): Initial readiness check failed \n***"
         RET=1
@@ -85,7 +85,7 @@ for SIGNAL in 11 9; do
 
         # Verify model is now NOT ready
         echo "Checking Not Ready Status..."
-        python3 -m unittest check_model_ready.ModelReadyTest.test_model_not_ready >> ${CLIENT_LOG} 2>&1
+        python3 -m unittest test_model_readiness.ModelReadinessTest.test_is_model_not_ready >> ${CLIENT_LOG} 2>&1
         if [ $? -ne 0 ]; then
             echo -e "\n***\n*** Test model_readiness Failed (Signal $SIGNAL): Model reported ready after kill \n***"
             RET=1
diff --git a/qa/L0_backend_python/model_readiness/check_model_ready.py b/qa/L0_backend_python/model_readiness/test_model_readiness.py
old mode 100644
new mode 100755
similarity index 96%
rename from qa/L0_backend_python/model_readiness/check_model_ready.py
rename to qa/L0_backend_python/model_readiness/test_model_readiness.py
index e27ac277ef..5463f969b2
--- a/qa/L0_backend_python/model_readiness/check_model_ready.py
+++ b/qa/L0_backend_python/model_readiness/test_model_readiness.py
@@ -30,7 +30,7 @@
 import tritonclient.http as httpclient
 
 
-class ModelReadyTest(unittest.TestCase):
+class ModelReadinessTest(unittest.TestCase):
     def setUp(self):
         self.model_name = "identity_fp32"
         self.url_http = "localhost:8000"
@@ -38,7 +38,7 @@ def setUp(self):
         self.client_http = httpclient.InferenceServerClient(url=self.url_http)
         self.client_grpc = grpcclient.InferenceServerClient(url=self.url_grpc)
 
-    def test_model_ready(self):
+    def test_is_model_ready(self):
         print(f"\nTesting if model '{self.model_name}' is READY ...")
 
         # Check HTTP
@@ -59,7 +59,7 @@ def test_model_ready(self):
         except Exception as e:
             self.fail(f"[gRPC] Unexpected error: {str(e)}")
 
-    def test_model_not_ready(self):
+    def test_is_model_not_ready(self):
         print(f"\nTesting if model '{self.model_name}' is NOT READY ...")
 
         # Check HTTP

From a85a459a60db04833f4637cbd98d11f4cd1c2605 Mon Sep 17 00:00:00 2001
From: Sai Kiran Polisetty <spolisetty@nvidia.com>
Date: Mon, 8 Dec 2025 14:16:15 +0530
Subject: [PATCH 15/17] Fix pre-commit

---
 qa/L0_backend_python/model_readiness/test_model_readiness.py | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 mode change 100755 => 100644 qa/L0_backend_python/model_readiness/test_model_readiness.py

diff --git a/qa/L0_backend_python/model_readiness/test_model_readiness.py b/qa/L0_backend_python/model_readiness/test_model_readiness.py
old mode 100755
new mode 100644

From 839a813dbac84620ab43b0aac3f598b560de30fc Mon Sep 17 00:00:00 2001
From: Sai Kiran Polisetty <spolisetty@nvidia.com>
Date: Mon, 8 Dec 2025 14:17:55 +0530
Subject: [PATCH 16/17] Update

---
 qa/L0_backend_python/model_readiness/test.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/qa/L0_backend_python/model_readiness/test.sh b/qa/L0_backend_python/model_readiness/test.sh
index 979d43e24b..1cf9a2e5ec 100755
--- a/qa/L0_backend_python/model_readiness/test.sh
+++ b/qa/L0_backend_python/model_readiness/test.sh
@@ -40,7 +40,7 @@ cp ../../python_models/$MODEL_NAME/model.py ./models/$MODEL_NAME/1/model.py
 cp ../../python_models/$MODEL_NAME/config.pbtxt ./models/$MODEL_NAME/config.pbtxt
 
 #
-# Test Model Ready Check (TRITONBACKEND_ModelInstanceReady)
+# Test Model Readiness (TRITONBACKEND_ModelInstanceReady)
 # Test with different signals to simulate various crash/exit scenarios
 # 11 (SIGSEGV) - Segmentation fault / crash
 # 9  (SIGKILL) - Force kill

From 56e4c8b204a7fb9b71198267e06ca2303f32ebac Mon Sep 17 00:00:00 2001
From: Sai Kiran Polisetty <spolisetty@nvidia.com>
Date: Mon, 8 Dec 2025 21:49:46 +0530
Subject: [PATCH 17/17] Update

---
 qa/L0_backend_python/model_readiness/test.sh                | 4 ++--
 .../model_readiness/test_model_readiness.py                 | 6 +++---
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/qa/L0_backend_python/model_readiness/test.sh b/qa/L0_backend_python/model_readiness/test.sh
index 1cf9a2e5ec..cc87aeacd8 100755
--- a/qa/L0_backend_python/model_readiness/test.sh
+++ b/qa/L0_backend_python/model_readiness/test.sh
@@ -60,7 +60,7 @@ for SIGNAL in 11 9; do
 
     # Verify model is initially ready
     echo "Checking Initial Readiness..."
-    python3 -m unittest test_model_readiness.ModelReadinessTest.test_is_model_ready >> ${CLIENT_LOG} 2>&1
+    python3 -m unittest test_model_readiness.TestModelReadiness.test_model_ready >> ${CLIENT_LOG} 2>&1
     if [ $? -ne 0 ]; then
         echo -e "\n***\n*** Test model_readiness Failed (Signal $SIGNAL): Initial readiness check failed \n***"
         RET=1
@@ -85,7 +85,7 @@ for SIGNAL in 11 9; do
 
         # Verify model is now NOT ready
         echo "Checking Not Ready Status..."
-        python3 -m unittest test_model_readiness.ModelReadinessTest.test_is_model_not_ready >> ${CLIENT_LOG} 2>&1
+        python3 -m unittest test_model_readiness.TestModelReadiness.test_model_not_ready >> ${CLIENT_LOG} 2>&1
         if [ $? -ne 0 ]; then
             echo -e "\n***\n*** Test model_readiness Failed (Signal $SIGNAL): Model reported ready after kill \n***"
             RET=1
diff --git a/qa/L0_backend_python/model_readiness/test_model_readiness.py b/qa/L0_backend_python/model_readiness/test_model_readiness.py
index 5463f969b2..65d1c81d8a 100644
--- a/qa/L0_backend_python/model_readiness/test_model_readiness.py
+++ b/qa/L0_backend_python/model_readiness/test_model_readiness.py
@@ -30,7 +30,7 @@
 import tritonclient.http as httpclient
 
 
-class ModelReadinessTest(unittest.TestCase):
+class TestModelReadiness(unittest.TestCase):
     def setUp(self):
         self.model_name = "identity_fp32"
         self.url_http = "localhost:8000"
@@ -38,7 +38,7 @@ def setUp(self):
         self.client_http = httpclient.InferenceServerClient(url=self.url_http)
         self.client_grpc = grpcclient.InferenceServerClient(url=self.url_grpc)
 
-    def test_is_model_ready(self):
+    def test_model_ready(self):
         print(f"\nTesting if model '{self.model_name}' is READY ...")
 
         # Check HTTP
@@ -59,7 +59,7 @@ def test_is_model_ready(self):
         except Exception as e:
             self.fail(f"[gRPC] Unexpected error: {str(e)}")
 
-    def test_is_model_not_ready(self):
+    def test_model_not_ready(self):
         print(f"\nTesting if model '{self.model_name}' is NOT READY ...")
 
         # Check HTTP