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extend rb_call_cache

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Prior to this changeset, majority of inline cache mishits resulted
into the same method entry when rb_callable_method_entry() resolves
a method search.  Let's not call the function at the first place on
such situations.

In doing so we extend the struct rb_call_cache from 44 bytes (in
case of 64 bit machine) to 64 bytes, and fill the gap with
secondary class serial(s).  Call cache's class serials now behavies
as a LRU cache.

Calculating -------------------------------------
                           ours         2.7         2.6
vm2_poly_same_method     2.339M      1.744M      1.369M i/s - 6.000M times in 2.565086s 3.441329s 4.381386s

Comparison:
             vm2_poly_same_method
                ours:   2339103.0 i/s
                 2.7:   1743512.3 i/s - 1.34x  slower
                 2.6:   1369429.8 i/s - 1.71x  slower
This commit is contained in:
卜部昌平 2019-10-07 12:59:57 +09:00
parent 3c252651e1
commit d45a013a1a
Notes: git 2019-11-07 17:41:56 +09:00
6 changed files with 75 additions and 19 deletions
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2
tool/ruby_vm/loaders/insns_def.rb
View file

@ -21,7 +21,7 @@ grammar = %r'
(?<keyword> typedef | extern | static | auto | register |
struct | union | enum ){0}
(?<C> (?: \g<block> | [^{}]+ )* ){0}
(?<block> \{ \g<ws>* ^ \g<C> $ \g<ws>* \} ){0}
(?<block> \{ \g<ws>* \g<C> \g<ws>* \} ){0}
(?<ws> \g<comment> | \s ){0}
(?<ident> [_a-zA-Z] [0-9_a-zA-Z]* ){0}
(?<type> (?: \g<keyword> \g<ws>+ )* \g<ident> ){0}

2
tool/ruby_vm/views/_mjit_compile_send.erb
View file

@ -36,7 +36,7 @@
% # JIT: Invalidate call cache if it requires vm_search_method. This allows to inline some of following things.
fprintf(f, " if (UNLIKELY(GET_GLOBAL_METHOD_STATE() != %"PRI_SERIALT_PREFIX"u ||\n", cc_copy->method_state);
fprintf(f, " RCLASS_SERIAL(CLASS_OF(stack[%d])) != %"PRI_SERIALT_PREFIX"u)) {\n", b->stack_size - 1 - argc, cc_copy->class_serial);
fprintf(f, " RCLASS_SERIAL(CLASS_OF(stack[%d])) != %"PRI_SERIALT_PREFIX"u)) {\n", b->stack_size - 1 - argc, cc_copy->class_serial[0]);
fprintf(f, " reg_cfp->pc = original_body_iseq + %d;\n", pos);
fprintf(f, " reg_cfp->sp = vm_base_ptr(reg_cfp) + %d;\n", b->stack_size);
fprintf(f, " goto send_cancel;\n");