Implement the rdc_lib API to support the job stats

Add the function to start and stop the job recording.
Add the function to get the job stats for each GPU and summary of multiple GPUs
Add the function to remove the jobs.

Add a class RdcLogger which can control the log level using the environment variable RDC_LOG.
This is similar to GRPC_VERBOSITY gRPC. When the customer has the issues, he can enable the verbose
log to help us to troubleshoot the issues.

Add the -u support in the rdci group, fieldgroup and dmon for connecting to rdcd without authentication.

Change-Id: I22c591823c1ee6485db106b911bed8271d1b2769

include/rdc_lib/impl/RdcCacheManagerImpl.h

@@ -23,7 +23,8 @@ THE SOFTWARE.
 #define RDC_LIB_IMPL_RDCCACHEMANAGERIMPL_H_
 
 #include <memory>
-#include <mutex>
+#include <mutex>  // NOLINT(build/c++11)
+#include <string>
 #include <vector>
 #include <map>
 #include "rdc_lib/RdcCacheManager.h"
@@ -41,6 +42,29 @@ struct RdcCacheEntry {
 
 typedef std::map<RdcFieldKey, std::vector<RdcCacheEntry>> RdcCacheSamples;
 
+struct FieldSummaryStats {
+    int64_t max_value;
+    int64_t min_value;
+    int64_t total_value;
+    uint64_t last_time;
+    uint64_t count;
+};
+
+struct GpuSummaryStats {
+    uint64_t energy_consumed;
+    uint64_t energy_last_time;
+    std::map<uint32_t, FieldSummaryStats> field_summaries;
+};
+
+// Per job entry
+struct RdcJobStatsCacheEntry {
+    uint64_t start_time;
+    uint64_t end_time;
+    std::map<uint32_t, GpuSummaryStats> gpu_stats;
+};
+
+// <job_id, job_stats>
+typedef std::map<std::string, RdcJobStatsCacheEntry> RdcJobStatsCache;
 
 class RdcCacheManagerImpl: public RdcCacheManager {
  public:
@@ -53,10 +77,27 @@ class RdcCacheManagerImpl: public RdcCacheManager {
                 const rdc_field_value& value) override;
     rdc_status_t evict_cache(uint32_t gpu_index, uint32_t field_id,
                 uint64_t max_keep_samples, double  max_keep_age) override;
-    uint32_t get_cache_size()  override;
+    std::string  get_cache_stats()  override;
+
+    rdc_status_t rdc_job_get_stats(char  job_id[64],
+        const rdc_gpu_total_memory_t& total_memory,
+        rdc_job_info_t* p_job_info) override;
+    rdc_status_t rdc_job_start_stats(char job_id[64],
+        const rdc_group_info_t& group,
+        const rdc_field_group_info_t& finfo) override;
+    rdc_status_t rdc_job_stop_stats(char job_id[64]) override;
+    rdc_status_t rdc_update_job_stats(uint32_t gpu_index,
+        const std::string& job_id,
+        const rdc_field_value& value) override;
+    rdc_status_t rdc_job_remove(char job_id[64]) override;
+    rdc_status_t rdc_job_remove_all() override;
 
  private:
+    void set_summary(const FieldSummaryStats & stats,
+        rdc_stats_summary_t& gpu, rdc_stats_summary_t& summary, // NOLINT
+        unsigned int adjuster);
     RdcCacheSamples cache_samples_;
+    RdcJobStatsCache cache_jobs_;
     std::mutex cache_mutex_;
 };