rts, base: Refactor stats.c to improve --machine-readable report

There should be no change in the output of the '+RTS -s' (summary)
report, or
the 'RTS -t' (one-line) report.

All data shown in the summary report is now shown in the machine
readable
report.

All data in RTSStats is now shown in the machine readable report.

init times are added to RTSStats and added to GHC.Stats.

Example of the new output:
```
 [("bytes allocated", "375016384")
 ,("num_GCs", "113")
 ,("average_bytes_used", "148348")
 ,("max_bytes_used", "206552")
 ,("num_byte_usage_samples", "2")
 ,("peak_megabytes_allocated", "6")
 ,("init_cpu_seconds", "0.001642")
 ,("init_wall_seconds", "0.001027")
 ,("mut_cpu_seconds", "3.020166")
 ,("mut_wall_seconds", "0.757244")
 ,("GC_cpu_seconds", "0.037750")
 ,("GC_wall_seconds", "0.009569")
 ,("exit_cpu_seconds", "0.000890")
 ,("exit_wall_seconds", "0.002551")
 ,("total_cpu_seconds", "3.060452")
 ,("total_wall_seconds", "0.770395")
 ,("major_gcs", "2")
 ,("allocated_bytes", "375016384")
 ,("max_live_bytes", "206552")
 ,("max_large_objects_bytes", "159344")
 ,("max_compact_bytes", "0")
 ,("max_slop_bytes", "59688")
 ,("max_mem_in_use_bytes", "6291456")
 ,("cumulative_live_bytes", "296696")
 ,("copied_bytes", "541024")
 ,("par_copied_bytes", "493976")
 ,("cumulative_par_max_copied_bytes", "104104")
 ,("cumulative_par_balanced_copied_bytes", "274456")
 ,("fragmentation_bytes", "2112")
 ,("alloc_rate", "124170795")
 ,("productivity_cpu_percent", "0.986838")
 ,("productivity_wall_percent", "0.982935")
 ,("bound_task_count", "1")
 ,("sparks_count", "5836258")
 ,("sparks_converted", "237")
 ,("sparks_overflowed", "1990408")
 ,("sparks_dud ", "0")
 ,("sparks_gcd", "3455553")
 ,("sparks_fizzled", "390060")
 ,("work_balance", "0.555606")
 ,("n_capabilities", "4")
 ,("task_count", "10")
 ,("peak_worker_count", "9")
 ,("worker_count", "9")
 ,("gc_alloc_block_sync_spin", "162")
 ,("gc_alloc_block_sync_yield", "0")
 ,("gc_alloc_block_sync_spin", "162")
 ,("gc_spin_spin", "18840855")
 ,("gc_spin_yield", "10355")
 ,("mut_spin_spin", "70331392")
 ,("mut_spin_yield", "61700")
 ,("waitForGcThreads_spin", "241")
 ,("waitForGcThreads_yield", "2797")
 ,("whitehole_gc_spin", "0")
 ,("whitehole_lockClosure_spin", "0")
 ,("whitehole_lockClosure_yield", "0")
 ,("whitehole_executeMessage_spin", "0")
 ,("whitehole_threadPaused_spin", "0")
 ,("any_work", "1667")
 ,("no_work", "1662")
 ,("scav_find_work", "1026")
 ,("gen_0_collections", "111")
 ,("gen_0_par_collections", "111")
 ,("gen_0_cpu_seconds", "0.036126")
 ,("gen_0_wall_seconds", "0.036126")
 ,("gen_0_max_pause_seconds", "0.036126")
 ,("gen_0_avg_pause_seconds", "0.000081")
 ,("gen_0_sync_spin", "21")
 ,("gen_0_sync_yield", "0")
 ,("gen_1_collections", "2")
 ,("gen_1_par_collections", "1")
 ,("gen_1_cpu_seconds", "0.001624")
 ,("gen_1_wall_seconds", "0.001624")
 ,("gen_1_max_pause_seconds", "0.001624")
 ,("gen_1_avg_pause_seconds", "0.000272")
 ,("gen_1_sync_spin", "3")
 ,("gen_1_sync_yield", "0")
 ]
```

Test Plan: Ensure that one-line and summary reports are unchanged.

Reviewers: erikd, simonmar, hvr

Subscribers: duog, carter, thomie, rwbarton

GHC Trac Issues: #14660

Differential Revision: https://phabricator.haskell.org/D4529

1 files changed, 19 insertions, 15 deletions

diff --git a/includes/RtsAPI.h b/includes/RtsAPI.h
index 6f011cbf6e..69ec6075db 100644
--- a/includes/RtsAPI.h
+++ b/includes/RtsAPI.h
@@ -184,7 +184,7 @@ typedef struct _RTSStats {
   uint64_t par_copied_bytes;
     // Sum of par_max_copied_bytes across all parallel GCs
   uint64_t cumulative_par_max_copied_bytes;
-  // Sum of par_balanced_copied_byes across all parallel GCs.
+    // Sum of par_balanced_copied_byes across all parallel GCs.
   uint64_t cumulative_par_balanced_copied_bytes;
 
   // -----------------------------------
@@ -192,6 +192,10 @@ typedef struct _RTSStats {
   // (we use signed values here because due to inaccuracies in timers
   // the values can occasionally go slightly negative)
 
+    // Total CPU time used by the init phase
+  Time init_cpu_ns;
+    // Total elapsed time used by the init phase
+  Time init_elapsed_ns;
     // Total CPU time used by the mutator
   Time mutator_cpu_ns;
     // Total elapsed time used by the mutator
@@ -213,26 +217,26 @@ typedef struct _RTSStats {
   // -----------------------------------
   // Internal Counters
 
-  // The number of times a GC thread spun on its 'gc_spin' lock.
-  // Will be zero if the rts was not built with PROF_SPIN
+    // The number of times a GC thread spun on its 'gc_spin' lock.
+    // Will be zero if the rts was not built with PROF_SPIN
   uint64_t gc_spin_spin;
-  // The number of times a GC thread yielded on its 'gc_spin' lock.
-  // Will be zero if the rts was not built with PROF_SPIN
+    // The number of times a GC thread yielded on its 'gc_spin' lock.
+    // Will be zero if the rts was not built with PROF_SPIN
   uint64_t gc_spin_yield;
-  // The number of times a GC thread spun on its 'mut_spin' lock.
-  // Will be zero if the rts was not built with PROF_SPIN
+    // The number of times a GC thread spun on its 'mut_spin' lock.
+    // Will be zero if the rts was not built with PROF_SPIN
   uint64_t mut_spin_spin;
-  // The number of times a GC thread yielded on its 'mut_spin' lock.
-  // Will be zero if the rts was not built with PROF_SPIN
+    // The number of times a GC thread yielded on its 'mut_spin' lock.
+    // Will be zero if the rts was not built with PROF_SPIN
   uint64_t mut_spin_yield;
-  // The number of times a GC thread has checked for work across all parallel
-  // GCs
+    // The number of times a GC thread has checked for work across all parallel
+    // GCs
   uint64_t any_work;
-  // The number of times a GC thread has checked for work and found none across
-  // all parallel GCs
+    // The number of times a GC thread has checked for work and found none
+    // across all parallel GCs
   uint64_t no_work;
-  // The number of times a GC thread has iterated it's outer loop across all
-  // parallel GCs
+    // The number of times a GC thread has iterated it's outer loop across all
+    // parallel GCs
   uint64_t scav_find_work;
 } RTSStats;