#18064: Workaround for multiple matmul hangs:

- Guard CSRRS by disabling branch prediction - Add a compiler flag which makes the SFPI compiler not to use replay buffers
tenstorrent · Feb 27, 2025 · c9e97b1 · c9e97b1
1 parent be1793d
commit c9e97b1
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Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/tt_metal/jit_build/build.cpp b/tt_metal/jit_build/build.cpp
@@ -330,7 +330,7 @@ JitBuildCompute::JitBuildCompute(const JitBuildEnv& env, const JitBuiltStateConf
     JitBuildState(env, build_config) {
     TT_ASSERT(this->core_id_ >= 0 && this->core_id_ < 3, "Invalid compute processor");
     this->lflags_ = env.lflags_;
-    this->cflags_ = env.cflags_;
+    this->cflags_ = env.cflags_ + " -fno-rvtt-sfpu-replay ";
     this->default_compile_opt_level_ = "O3";
     this->default_linker_opt_level_ = "O3";
     this->out_path_ = this->is_fw_ ? env_.out_firmware_root_ : env_.out_kernel_root_;

diff --git a/tt_metal/third_party/tt_llk b/tt_metal/third_party/tt_llk