feat: add info section: server stats cpu commandstats (#338)

* add infoCmd:server stats cpu commandstats

---------

Co-authored-by: Xin.Zh <alexstocks@foxmail.com>

src/client.cc

@@ -17,7 +17,11 @@
 
 #include "base_cmd.h"
 #include "config.h"
+#include "env.h"
 #include "pikiwidb.h"
+#include "pstd_string.h"
+#include "slow_log.h"
+#include "store.h"
 
 namespace pikiwidb {
 
@@ -353,7 +357,8 @@ int PClient::handlePacket(const char* start, int bytes) {
   //  executeCommand();
   //    return static_cast<int>(ptr - start);
   //  }
-
+  auto now = std::chrono::steady_clock::now();
+  time_stat_->SetEnqueueTs(now);
   g_pikiwidb->SubmitFast(std::make_shared<CmdThreadPoolTask>(shared_from_this()));
 
   // check transaction
@@ -424,6 +429,7 @@ PClient* PClient::Current() { return s_current; }
 PClient::PClient() : parser_(params_) {
   auth_ = false;
   reset();
+  time_stat_.reset(new TimeStat());
 }
 
 void PClient::OnConnect() {
@@ -665,4 +671,8 @@ void PClient::SetKey(std::vector<std::string>& names) {
   keys_ = std::move(names);  // use std::move clear copy expense
 }
 
+std::unordered_map<std::string, CommandStatistics>* PClient::GetCommandStatMap() { return &cmdstat_map_; }
+
+std::shared_ptr<TimeStat> PClient::GetTimeStat() { return time_stat_; }
+
 }  // namespace pikiwidb

src/client.h

@@ -7,6 +7,7 @@
 
 #pragma once
 
+#include <chrono>
 #include <set>
 #include <span>
 #include <unordered_map>
@@ -21,6 +22,41 @@
 
 namespace pikiwidb {
 
+struct CommandStatistics {
+  CommandStatistics() = default;
+  CommandStatistics(const CommandStatistics& other)
+      : cmd_count_(other.cmd_count_.load()), cmd_time_consuming_(other.cmd_time_consuming_.load()) {}
+
+  std::atomic<uint64_t> cmd_count_ = 0;
+  std::atomic<uint64_t> cmd_time_consuming_ = 0;
+};
+
+struct TimeStat {
+  using TimePoint = std::chrono::time_point<std::chrono::steady_clock>;
+
+  TimeStat() = default;
+
+  void Reset() {
+    enqueue_ts_ = TimePoint::min();
+    dequeue_ts_ = TimePoint::min();
+    process_done_ts_ = TimePoint::min();
+  }
+
+  uint64_t GetTotalTime() const {
+    return (process_done_ts_ > enqueue_ts_)
+               ? std::chrono::duration_cast<std::chrono::milliseconds>(process_done_ts_ - enqueue_ts_).count()
+               : 0;
+  }
+
+  void SetEnqueueTs(TimePoint now_time) { enqueue_ts_ = now_time; }
+  void SetDequeueTs(TimePoint now_time) { dequeue_ts_ = now_time; }
+  void SetProcessDoneTs(TimePoint now_time) { process_done_ts_ = now_time; }
+
+  TimePoint enqueue_ts_ = TimePoint::min();
+  TimePoint dequeue_ts_ = TimePoint::min();
+  TimePoint process_done_ts_ = TimePoint::min();
+};
+
 class CmdRes {
  public:
   enum CmdRet {
@@ -236,6 +272,10 @@ class PClient : public std::enable_shared_from_this<PClient>, public CmdRes {
   // e.g：["set","key","value"]
   std::span<std::string> argv_;
 
+  // Info Commandstats used
+  std::unordered_map<std::string, CommandStatistics>* GetCommandStatMap();
+  std::shared_ptr<TimeStat> GetTimeStat();
+
   //  std::shared_ptr<TcpConnection> getTcpConnection() const { return tcp_connection_.lock(); }
   int handlePacket(const char*, int);
 
@@ -291,5 +331,11 @@ class PClient : public std::enable_shared_from_this<PClient>, public CmdRes {
   net::SocketAddr addr_;
 
   static thread_local PClient* s_current;
+
+  /*
+   * Info Commandstats used
+   */
+  std::unordered_map<std::string, CommandStatistics> cmdstat_map_;
+  std::shared_ptr<TimeStat> time_stat_;
 };
 }  // namespace pikiwidb