cls_log benchmark

test_cls_log.cc

diff --git a/src/test/cls_log/test_cls_log.cc b/src/test/cls_log/test_cls_log.cc
index 868afcaf65..e23322ff25 100644
--- a/src/test/cls_log/test_cls_log.cc
+++ b/src/test/cls_log/test_cls_log.cc
@@ -381,3 +381,34 @@ TEST_F(cls_log, trim_by_marker)
     ASSERT_EQ(-ENODATA, do_log_trim(ioctx, oid, from, to));
   }
 }
+
+static void create_remove(librados::IoCtx& ioctx, std::string& oid, int count)
+{
+  ASSERT_EQ(0, ioctx.create(oid, true));
+
+  const utime_t t0 = ceph_clock_now();
+
+  utime_t time = t0;
+  for (int i = 0; i < count/1000; i++) {
+    generate_log(ioctx, oid, 1000, time, true);
+    time.sec_ref() += 1000;
+  }
+
+  const utime_t t1 = ceph_clock_now();
+  std::cout << oid << " created entries in " << (t1 - t0) << std::endl;
+
+  ASSERT_EQ(0, do_log_trim(ioctx, oid, "", "9"));
+
+  const utime_t t2 = ceph_clock_now();
+  std::cout << oid << " trimmed entries in " << (t2 - t1) << std::endl;
+
+  ASSERT_EQ(-ENODATA, do_log_trim(ioctx, oid, "", "9"));
+}
+
+TEST_F(cls_log, trim_many)
+{
+  create_remove(ioctx, "10k", 10000);
+  create_remove(ioctx, "100k", 100000);
+  create_remove(ioctx, "1m", 1000000);
+  create_remove(ioctx, "10m", 10000000);
+}