From: Krzysztof Parzyszek <kparzysz@quicinc.com>
Date: Thu, 14 May 2020 00:16:14 +0000 (-0500)
Subject: [Hexagon] One more fix for concurrency count (#5589)
X-Git-Tag: upstream/0.7.0~727
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=dc9b55768ef880ff9307bf2d3139bbf3cd2e2568;p=platform%2Fupstream%2Ftvm.git

[Hexagon] One more fix for concurrency count (#5589)
---

diff --git a/src/runtime/threading_backend.cc b/src/runtime/threading_backend.cc
index 2e781ea..e5520ef 100644
--- a/src/runtime/threading_backend.cc
+++ b/src/runtime/threading_backend.cc
@@ -34,6 +34,9 @@
 #if defined(__linux__)
 #include <sched.h>
 #endif
+#if defined(__hexagon__)
+#include <dlfcn.h>
+#endif
 
 namespace tvm {
 namespace runtime {
@@ -177,6 +180,11 @@ class ThreadGroup::Impl {
 
   void InitSortedOrder() {
     unsigned int threads = std::thread::hardware_concurrency();
+#if defined(__hexagon__)
+    // With unsigned PDs, getting the number of available hardware threads
+    // is not supported in earlier versions of QuRT. In such cases assume 4.
+    if (threads == 0) threads = 4;
+#endif
     std::vector<std::pair<unsigned int, int64_t> > max_freqs;
 
     for (unsigned int i = 0; i < threads; ++i) {