1 files changed, 78 insertions, 0 deletions
diff --git a/src/rocksdb/monitoring/iostats_context.cc b/src/rocksdb/monitoring/iostats_context.cc
new file mode 100644
index 000000000..04e98914d
--- /dev/null
+++ b/src/rocksdb/monitoring/iostats_context.cc
@@ -0,0 +1,78 @@
+// Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
+//  This source code is licensed under both the GPLv2 (found in the
+//  COPYING file in the root directory) and Apache 2.0 License
+//  (found in the LICENSE.Apache file in the root directory).
+
+#include <sstream>
+
+#include "monitoring/iostats_context_imp.h"
+#include "rocksdb/env.h"
+
+namespace ROCKSDB_NAMESPACE {
+
+#ifdef NIOSTATS_CONTEXT
+// Should not be used because the counters are not thread-safe.
+// Put here just to make get_iostats_context() simple without ifdef.
+static IOStatsContext iostats_context;
+#else
+thread_local IOStatsContext iostats_context;
+#endif
+
+IOStatsContext* get_iostats_context() { return &iostats_context; }
+
+void IOStatsContext::Reset() {
+#ifndef NIOSTATS_CONTEXT
+  thread_pool_id = Env::Priority::TOTAL;
+  bytes_read = 0;
+  bytes_written = 0;
+  open_nanos = 0;
+  allocate_nanos = 0;
+  write_nanos = 0;
+  read_nanos = 0;
+  range_sync_nanos = 0;
+  prepare_write_nanos = 0;
+  fsync_nanos = 0;
+  logger_nanos = 0;
+  cpu_write_nanos = 0;
+  cpu_read_nanos = 0;
+  file_io_stats_by_temperature.Reset();
+#endif  //! NIOSTATS_CONTEXT
+}
+
+#define IOSTATS_CONTEXT_OUTPUT(counter)         \
+  if (!exclude_zero_counters || counter > 0) {  \
+    ss << #counter << " = " << counter << ", "; \
+  }
+
+std::string IOStatsContext::ToString(bool exclude_zero_counters) const {
+#ifdef NIOSTATS_CONTEXT
+  (void)exclude_zero_counters;
+  return "";
+#else
+  std::ostringstream ss;
+  IOSTATS_CONTEXT_OUTPUT(thread_pool_id);
+  IOSTATS_CONTEXT_OUTPUT(bytes_read);
+  IOSTATS_CONTEXT_OUTPUT(bytes_written);
+  IOSTATS_CONTEXT_OUTPUT(open_nanos);
+  IOSTATS_CONTEXT_OUTPUT(allocate_nanos);
+  IOSTATS_CONTEXT_OUTPUT(write_nanos);
+  IOSTATS_CONTEXT_OUTPUT(read_nanos);
+  IOSTATS_CONTEXT_OUTPUT(range_sync_nanos);
+  IOSTATS_CONTEXT_OUTPUT(fsync_nanos);
+  IOSTATS_CONTEXT_OUTPUT(prepare_write_nanos);
+  IOSTATS_CONTEXT_OUTPUT(logger_nanos);
+  IOSTATS_CONTEXT_OUTPUT(cpu_write_nanos);
+  IOSTATS_CONTEXT_OUTPUT(cpu_read_nanos);
+  IOSTATS_CONTEXT_OUTPUT(file_io_stats_by_temperature.hot_file_bytes_read);
+  IOSTATS_CONTEXT_OUTPUT(file_io_stats_by_temperature.warm_file_bytes_read);
+  IOSTATS_CONTEXT_OUTPUT(file_io_stats_by_temperature.cold_file_bytes_read);
+  IOSTATS_CONTEXT_OUTPUT(file_io_stats_by_temperature.hot_file_read_count);
+  IOSTATS_CONTEXT_OUTPUT(file_io_stats_by_temperature.warm_file_read_count);
+  IOSTATS_CONTEXT_OUTPUT(file_io_stats_by_temperature.cold_file_read_count);
+  std::string str = ss.str();
+  str.erase(str.find_last_not_of(", ") + 1);
+  return str;
+#endif  //! NIOSTATS_CONTEXT
+}
+
+}  // namespace ROCKSDB_NAMESPACE