diff --git a/.github/checkgroup.yml b/.github/checkgroup.yml
index 8e92842b48..6c7c6aa5f7 100644
--- a/.github/checkgroup.yml
+++ b/.github/checkgroup.yml
@@ -89,14 +89,15 @@ subprojects:
     checks:
       - "lightning.Benchmarks"
 
-  - id: "pytorch-lightning: TPU workflow"
-    paths:
-      # tpu CI availability is very limited, so we only require tpu tests
-      # to pass when their configurations are modified
-      - ".github/workflows/tpu-tests.yml"
-      - "tests/tests_pytorch/run_tpu_tests.sh"
-    checks:
-      - "test-on-tpus (pytorch, pjrt, v4-8)"
+  # Temporarily disabled
+  #  - id: "pytorch-lightning: TPU workflow"
+  #    paths:
+  #      # tpu CI availability is very limited, so we only require tpu tests
+  #      # to pass when their configurations are modified
+  #      - ".github/workflows/tpu-tests.yml"
+  #      - "tests/tests_pytorch/run_tpu_tests.sh"
+  #    checks:
+  #      - "test-on-tpus (pytorch, pjrt, v4-8)"
 
   - id: "fabric: Docs"
     paths:
diff --git a/.github/workflows/tpu-tests.yml b/.github/workflows/tpu-tests.yml.disabled
similarity index 100%
rename from .github/workflows/tpu-tests.yml
rename to .github/workflows/tpu-tests.yml.disabled
diff --git a/src/lightning/fabric/accelerators/cpu.py b/src/lightning/fabric/accelerators/cpu.py
index a2be8a44b1..0334210ecd 100644
--- a/src/lightning/fabric/accelerators/cpu.py
+++ b/src/lightning/fabric/accelerators/cpu.py
@@ -11,7 +11,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-from typing import Union
+from typing import List, Union
 
 import torch
 from typing_extensions import override
@@ -39,13 +39,13 @@ class CPUAccelerator(Accelerator):
 
     @staticmethod
     @override
-    def parse_devices(devices: Union[int, str, list[int]]) -> int:
+    def parse_devices(devices: Union[int, str]) -> int:
         """Accelerator device parsing logic."""
         return _parse_cpu_cores(devices)
 
     @staticmethod
     @override
-    def get_parallel_devices(devices: Union[int, str, list[int]]) -> list[torch.device]:
+    def get_parallel_devices(devices: Union[int, str]) -> List[torch.device]:
         """Gets parallel devices for the Accelerator."""
         devices = _parse_cpu_cores(devices)
         return [torch.device("cpu")] * devices
@@ -72,12 +72,12 @@ class CPUAccelerator(Accelerator):
         )
 
 
-def _parse_cpu_cores(cpu_cores: Union[int, str, list[int]]) -> int:
+def _parse_cpu_cores(cpu_cores: Union[int, str]) -> int:
     """Parses the cpu_cores given in the format as accepted by the ``devices`` argument in the
     :class:`~lightning.pytorch.trainer.trainer.Trainer`.
 
     Args:
-        cpu_cores: An int > 0.
+        cpu_cores: An int > 0 or a string that can be converted to an int > 0.
 
     Returns:
         An int representing the number of processes
diff --git a/src/lightning/pytorch/accelerators/cpu.py b/src/lightning/pytorch/accelerators/cpu.py
index 177514232f..a85a959ab6 100644
--- a/src/lightning/pytorch/accelerators/cpu.py
+++ b/src/lightning/pytorch/accelerators/cpu.py
@@ -11,7 +11,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-from typing import Any, Union
+from typing import Any, Dict, List, Union
 
 import torch
 from lightning_utilities.core.imports import RequirementCache
@@ -38,7 +38,7 @@ class CPUAccelerator(Accelerator):
             raise MisconfigurationException(f"Device should be CPU, got {device} instead.")
 
     @override
-    def get_device_stats(self, device: _DEVICE) -> dict[str, Any]:
+    def get_device_stats(self, device: _DEVICE) -> Dict[str, Any]:
         """Get CPU stats from ``psutil`` package."""
         return get_cpu_stats()
 
@@ -48,13 +48,13 @@ class CPUAccelerator(Accelerator):
 
     @staticmethod
     @override
-    def parse_devices(devices: Union[int, str, list[int]]) -> int:
+    def parse_devices(devices: Union[int, str]) -> int:
         """Accelerator device parsing logic."""
         return _parse_cpu_cores(devices)
 
     @staticmethod
     @override
-    def get_parallel_devices(devices: Union[int, str, list[int]]) -> list[torch.device]:
+    def get_parallel_devices(devices: Union[int, str]) -> List[torch.device]:
         """Gets parallel devices for the Accelerator."""
         devices = _parse_cpu_cores(devices)
         return [torch.device("cpu")] * devices
@@ -89,7 +89,7 @@ _CPU_SWAP_PERCENT = "cpu_swap_percent"
 _PSUTIL_AVAILABLE = RequirementCache("psutil")
 
 
-def get_cpu_stats() -> dict[str, float]:
+def get_cpu_stats() -> Dict[str, float]:
     if not _PSUTIL_AVAILABLE:
         raise ModuleNotFoundError(
             f"Fetching CPU device stats requires `psutil` to be installed. {str(_PSUTIL_AVAILABLE)}"
diff --git a/src/lightning/pytorch/trainer/trainer.py b/src/lightning/pytorch/trainer/trainer.py
index 4531600360..0509f28acb 100644
--- a/src/lightning/pytorch/trainer/trainer.py
+++ b/src/lightning/pytorch/trainer/trainer.py
@@ -1362,9 +1362,10 @@ class Trainer:
                 "Saving a checkpoint is only possible if a model is attached to the Trainer. Did you call"
                 " `Trainer.save_checkpoint()` before calling `Trainer.{fit,validate,test,predict}`?"
             )
-        checkpoint = self._checkpoint_connector.dump_checkpoint(weights_only)
-        self.strategy.save_checkpoint(checkpoint, filepath, storage_options=storage_options)
-        self.strategy.barrier("Trainer.save_checkpoint")
+        with self.profiler.profile("save_checkpoint"):
+            checkpoint = self._checkpoint_connector.dump_checkpoint(weights_only)
+            self.strategy.save_checkpoint(checkpoint, filepath, storage_options=storage_options)
+            self.strategy.barrier("Trainer.save_checkpoint")
 
     """
     State properties