From 9bb17c53ead4d27158334d65ff673b3737d93a92 Mon Sep 17 00:00:00 2001
From: nimlgen <138685161+nimlgen@users.noreply.github.com>
Date: Mon, 17 Nov 2025 13:59:03 +0300
Subject: [PATCH] amd: timer fix (#13267)

---
 test/mockgpu/amd/amdgpu.py  | 1 +
 tinygrad/runtime/ops_amd.py | 1 +
 2 files changed, 2 insertions(+)

diff --git a/test/mockgpu/amd/amdgpu.py b/test/mockgpu/amd/amdgpu.py
index afa8b4d44b..7b13b72562 100644
--- a/test/mockgpu/amd/amdgpu.py
+++ b/test/mockgpu/amd/amdgpu.py
@@ -124,6 +124,7 @@ class PM4Executor(AMDQueue):
     elif mem_data_sel == 3:
       if mem_event_type == CACHE_FLUSH_AND_INV_TS_EVENT: ptr.cast('Q')[0] = int(time.perf_counter() * 1e8)
       else: raise RuntimeError(f"Unknown {mem_data_sel=} {mem_event_type=}")
+    elif mem_data_sel == 0: pass # no write
     else: raise RuntimeError(f"Unknown {mem_data_sel=}")
 
   def _exec_copy_data(self, n):
diff --git a/tinygrad/runtime/ops_amd.py b/tinygrad/runtime/ops_amd.py
index d97a2f79b2..7a956a2ae8 100644
--- a/tinygrad/runtime/ops_amd.py
+++ b/tinygrad/runtime/ops_amd.py
@@ -357,6 +357,7 @@ class AMDComputeQueue(HWQueue):
 
   def timestamp(self, signal:AMDSignal):
     with self.pred_exec(xcc_mask=0b1):
+      self.release_mem(cache_flush=False) # ensure all prior writes are done
       self.release_mem(signal.timestamp_addr, 0, self.pm4.data_sel__mec_release_mem__send_gpu_clock_counter, self.pm4.int_sel__mec_release_mem__none)
       self.acquire_mem() # ensure timestamp is written
     return self