message: Set maxStreamCallbackThreadsPerNumaNode
  Summary:
  Automatically enable numa pinned threads for infeed callbacks
  Fixes T29487
  Test Plan: All tests pass, hw tests pass
  Reviewers: jakeh, hakons, #tensorflow, #framework_ip_review_-_any_oss_or_third-party_code_use_has_been_approved
  Maniphest Tasks: T29487
diff: @@ -1691,6 +1691,12 @@ Status PoplarExecutor::ConfigurePoplarDevice(const IpuOptions& cfg) {
  option_flags_.set("exchange.enablePrefetch", "true");
  }
  + option_flags_.set(
  + "target.maxStreamCallbackThreadsPerNumaNode",
  + PoplarXlaFlags::Get().max_infeed_threads > 0
  + ? std::to_string(PoplarXlaFlags::Get().max_infeed_threads)
  + : "auto");
  +
  for (const auto& opt : current_config_.compilation_options()) {
  option_flags_.set(opt.option(), opt.value());
  }
  