From: Chunsong Feng <fengchunsong@huawei.com>
Date: Sat, 26 Dec 2020 09:06:06 +0000 (+0800)
Subject: test/perf_local: Add div32,prefetch,memory barrier bench for arm64
X-Git-Tag: v16.1.0~163^2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=refs%2Fpull%2F38719%2Fhead;p=ceph.git

test/perf_local: Add div32,prefetch,memory barrier bench for arm64

arm64 support div32,prefetch,memory barrier, so add them to benchmark.

Signed-off-by: Chunsong Feng <fengchunsong@huawei.com>
Signed-off-by: luo rixin <luorixin@huawei.com>
---

diff --git a/src/test/perf_local.cc b/src/test/perf_local.cc
index 9df3b90cf4a..ecd7dc79246 100644
--- a/src/test/perf_local.cc
+++ b/src/test/perf_local.cc
@@ -381,6 +381,18 @@ double div32()
   }
   uint64_t stop = Cycles::rdtsc();
   return Cycles::to_seconds(stop - start)/count;
+#elif defined(__aarch64__)
+  int count = 1000000;
+  uint64_t start = Cycles::rdtsc();
+  uint64_t numerator = 0xa5a5a5a555aa55aaUL;
+  uint32_t divisor = 0xaa55aa55U;
+  uint32_t result;
+  for (int i = 0; i < count; i++) {
+    asm volatile("udiv %0, %1, %2" : "=r"(result) :
+                  "r"(numerator), "r"(divisor));
+  }
+  uint64_t stop = Cycles::rdtsc();
+  return Cycles::to_seconds(stop - start)/count;
 #else
   return -1;
 #endif
@@ -610,12 +622,20 @@ static inline void prefetch(const void *object, uint64_t num_bytes)
     for (uint64_t i = 0; i < offset + num_bytes; i += 64)
         _mm_prefetch(p + i, _MM_HINT_T0);
 }
+#elif defined(__aarch64__)
+static inline void prefetch(const void *object, uint64_t num_bytes)
+{
+    uint64_t offset = reinterpret_cast<uint64_t>(object) & 0x3fUL;
+    const char* ptr = reinterpret_cast<const char*>(object) - offset;
+    for (uint64_t i = 0; i < offset + num_bytes; i += 64, ptr += 64)
+        asm volatile("prfm pldl1keep, %a0\n" : : "p" (ptr));
+}
 #endif
 
 // Measure the cost of the prefetch instruction.
 double perf_prefetch()
 {
-#ifdef HAVE_SSE
+#if defined(HAVE_SSE) || defined(__aarch64__)
   uint64_t total_ticks = 0;
   int count = 10;
   char buf[16 * 64];
@@ -692,6 +712,14 @@ double lfence()
   }
   uint64_t stop = Cycles::rdtsc();
   return Cycles::to_seconds(stop - start)/count;
+#elif defined(__aarch64__)
+  int count = 1000000;
+  uint64_t start = Cycles::rdtsc();
+  for (int i = 0; i < count; i++) {
+    asm volatile("dmb ishld" ::: "memory");
+  }
+  uint64_t stop = Cycles::rdtsc();
+  return Cycles::to_seconds(stop - start)/count;
 #else
   return -1;
 #endif
@@ -708,6 +736,14 @@ double sfence()
   }
   uint64_t stop = Cycles::rdtsc();
   return Cycles::to_seconds(stop - start)/count;
+#elif defined(__aarch64__)
+  int count = 1000000;
+  uint64_t start = Cycles::rdtsc();
+  for (int i = 0; i < count; i++) {
+    asm volatile("dmb ishst" ::: "memory");
+  }
+  uint64_t stop = Cycles::rdtsc();
+  return Cycles::to_seconds(stop - start)/count;
 #else
   return -1;
 #endif