add dpdk dummy

test/dpdk_dummy/rte_cycles.h

@@ -0,0 +1,14 @@
+#pragma once
+
+#include <stdint.h>
+
+uint64_t rte_get_tsc_cycles() {
+    unsigned int lo, hi;
+    __asm__ __volatile__("rdtsc" : "=a"(lo), "=d"(hi));
+    return ((uint64_t)hi << 32) | lo;
+}
+
+uint64_t rte_get_tsc_hz() {
+    // 1.8 GHz
+    return 1800000000;
+}