for more accurate estimation of tsc frequency in x86.

frmenguy · Feb 21, 2021 · eb5f606 · eb5f606
1 parent e8aefcb
commit eb5f606
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diff --git a/src/dpdk/lib/librte_eal/common/eal_common_timer.c b/src/dpdk/lib/librte_eal/common/eal_common_timer.c
@@ -50,8 +50,12 @@ estimate_tsc_freq(void)
 	/* assume that the sleep(1) will sleep for 1 second */
 	uint64_t start = rte_rdtsc();
 	sleep(1);
+#if defined(TREX_PATCH) && !defined(RTE_ARCH_ARM64)
+	return rte_rdtsc() - start;
+#else
 	/* Round up to 10Mhz. 1E7 ~ 10Mhz */
 	return RTE_ALIGN_MUL_NEAR(rte_rdtsc() - start, CYC_PER_10MHZ);
+#endif
 }
 
 void

diff --git a/src/dpdk/lib/librte_eal/linux/eal_timer.c b/src/dpdk/lib/librte_eal/linux/eal_timer.c
@@ -221,8 +221,12 @@ get_tsc_freq(void)
 
 		double secs = (double)ns/NS_PER_SEC;
 		tsc_hz = (uint64_t)((end - start)/secs);
+#if defined(TREX_PATCH) && !defined(RTE_ARCH_ARM64)
+		return tsc_hz;
+#else
 		/* Round up to 10Mhz. 1E7 ~ 10Mhz */
 		return RTE_ALIGN_MUL_NEAR(tsc_hz, CYC_PER_10MHZ);
+#endif
 	}
 #endif
 	return 0;