YJIT: add new stats counter for compiled ISEQ entry points (#8032)

* YJIT: add new stats counter for compiled ISEQ entry points

* Update yjit.rb

Co-authored-by: Takashi Kokubun <takashikkbn@gmail.com>

---------

Co-authored-by: Takashi Kokubun <takashikkbn@gmail.com>

yjit.rb

@@ -285,6 +285,7 @@ module RubyVM::YJIT
       out.puts "bindings_allocations:  " + format_number(13, stats[:binding_allocations])
       out.puts "bindings_set:          " + format_number(13, stats[:binding_set])
       out.puts "compilation_failure:   " + format_number(13, compilation_failure) if compilation_failure != 0
+      out.puts "compiled_iseq_entry:   " + format_number(13, stats[:compiled_iseq_entry])
       out.puts "compiled_iseq_count:   " + format_number(13, stats[:compiled_iseq_count])
       out.puts "compiled_blockid_count:" + format_number(13, stats[:compiled_blockid_count])
       out.puts "compiled_block_count:  " + format_number(13, stats[:compiled_block_count])

yjit/src/core.rs

@@ -2168,6 +2168,9 @@ pub fn gen_entry_point(iseq: IseqPtr, ec: EcPtr) -> Option<CodePtr> {
         }
     }
 
+    // Count the number of entry points we compile
+    incr_counter!(compiled_iseq_entry);
+
     // Compilation successful and block not empty
     return code_ptr;
 }

yjit/src/stats.rs

@@ -369,6 +369,7 @@ make_counters! {
     binding_set,
 
     vm_insns_count,
+    compiled_iseq_entry,
     compiled_iseq_count,
     compiled_blockid_count,
     compiled_block_count,