ifdef linux specific stuff

ServerBench.cpp

@@ -228,11 +228,6 @@ private:
     return ret;
   }
 };
-#else
-struct PerfCounter {
-  PerfCounter(int, int) {}
-  int64_t total() { return 0; }
-};
 #endif
 
 int main(int argc, char **argv) {
@@ -247,6 +242,7 @@ int main(int argc, char **argv) {
     int metricsCount;
     cs.getMetricsV1(&metrics, &metricsCount);
 
+#ifdef __linux__
     PerfCounter instructions{PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS};
     PerfCounter cycles{PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES, "",
                        instructions.getFd()};
@@ -288,6 +284,7 @@ int main(int argc, char **argv) {
         }
       }
     }
+#endif
 
     auto w = std::thread{workload, &cs};
 
@@ -316,6 +313,7 @@ int main(int argc, char **argv) {
               "transactions_total ";
       body += std::to_string(transactions.load(std::memory_order_relaxed));
       body += "\n";
+#ifdef __linux__
       body += "# HELP instructions_total Total number of instructions\n"
               "# TYPE instructions_total counter\n"
               "instructions_total ";
@@ -332,6 +330,7 @@ int main(int argc, char **argv) {
         body += "cache_event_total" + counter.getLabels() + " " +
                 std::to_string(counter.total()) + "\n";
       }
+#endif
 
       for (int i = 0; i < metricsCount; ++i) {
         body += "# HELP ";