[Bugfix] Avoid more OpenMP thread reallocation in CPU torch compile (#37538)

Signed-off-by: jiang1.li <jiang1.li@intel.com>

vllm/platforms/cpu.py

@@ -281,6 +281,9 @@ class CpuPlatform(Platform):
         # Disable multi-stream for shared experts as no Stream on CPU
         os.environ["VLLM_DISABLE_SHARED_EXPERTS_STREAM"] = "1"
 
+        # Avoid inductor generates num_thread() and breaks the thread binding
+        os.environ["TORCHINDUCTOR_CPP_DYNAMIC_THREADS"] = "1"
+
         # Intel OpenMP setting
         ld_preload_str = os.getenv("LD_PRELOAD", "")
         if "libiomp5.so" in ld_preload_str: