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[Hexagon] One more fix for concurrency count #5589

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May 14, 2020
Merged

[Hexagon] One more fix for concurrency count #5589

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8 changes: 8 additions & 0 deletions src/runtime/threading_backend.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,9 @@
#if defined(__linux__)
#include <sched.h>
#endif
#if defined(__hexagon__)
#include <dlfcn.h>
#endif

namespace tvm {
namespace runtime {
Expand Down Expand Up @@ -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) {
Expand Down