[CPU] add c++ kernel to bind CPU cores and memory node (#7524)

test/srt/cpu/test_binding.py

@@ -0,0 +1,28 @@
+import re
+import unittest
+
+import sgl_kernel
+import torch
+
+kernel = torch.ops.sgl_kernel
+
+from sglang.test.test_utils import CustomTestCase
+
+
+class TestGemm(CustomTestCase):
+    def test_binding(self):
+        start_id = 1
+        n_cpu = 6
+
+        expected_cores = list(map(str, range(start_id, start_id + n_cpu)))
+        cpu_ids = ",".join(expected_cores)
+        output = kernel.init_cpu_threads_env(cpu_ids)
+
+        bindings = re.findall(r"OMP tid: \d+, core (\d+)", output)
+        self.assertEqual(len(bindings), n_cpu)
+
+        self.assertEqual(bindings, expected_cores)
+
+
+if __name__ == "__main__":
+    unittest.main()