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rb_call_info_t: shrink to 96 bytes from 104 bytes on 64-bit

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This keeps ci->flag and ci->aux.index consistent across 32-bit
and 64-bit platforms.

ci->flag: VM_CALL_* flags only use 9 bits, currently
ci->aux.index: 2 billion ivars per class should be enough for anybody

This saves around 50K allocations on "valgrind ruby -e exit" on x86-64
before:
  total heap usage: 48,122 allocs, 19,253 frees, 8,099,197 bytes allocated
after:
  total heap usage: 48,069 allocs, 19,214 frees, 8,047,266 bytes allocated

* vm_core.h (rb_call_info_t): ci->flag becomes 32-bit unsigned int
  ci->index becomes a 32-bit signed int (from signed long).
  Reorder for better packing on 64-bit, giving an 8 byte reduction
  from 104 to 96 bytes for each ci.

* compile.c (new_callinfo, setup_args, iseq_compile_each,
  iseq_build_from_ary_body): adjust for type changes

* vm_insnhelper.c (vm_getivar): ditto

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47509 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
normal 2014-09-10 06:32:44 +00:00
parent ea4c97904e
commit b3a4367ce4
6 changed files with 40 additions and 24 deletions
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13
ChangeLog
View file

@ -1,3 +1,16 @@
Wed Sep 10 15:29:46 2014 Eric Wong <e@80x24.org>
* vm_core.h (rb_call_info_t): ci->flag becomes 32-bit unsigned int
ci->index becomes a 32-bit signed int (from signed long).
Reorder for better packing on 64-bit, giving an 8 byte reduction
from 104 to 96 bytes for each ci.
[Feature #10187]
* compile.c (new_callinfo, setup_args, iseq_compile_each,
iseq_build_from_ary_body): adjust for type changes
* vm_insnhelper.c (vm_getivar): ditto
Wed Sep 10 15:07:35 2014 Eric Wong <e@80x24.org>
* compile.c (rb_iseq_translate_threaded_code):

32
compile.c
View file

@ -981,7 +981,7 @@ new_insn_body(rb_iseq_t *iseq, int line_no, enum ruby_vminsn_type insn_id, int a
}
static rb_call_info_t *
new_callinfo(rb_iseq_t *iseq, ID mid, int argc, VALUE block, unsigned long flag)
new_callinfo(rb_iseq_t *iseq, ID mid, int argc, VALUE block, unsigned int flag)
{
rb_call_info_t *ci = (rb_call_info_t *)compile_data_alloc(iseq, sizeof(rb_call_info_t));
ci->mid = mid;
@ -3119,7 +3119,7 @@ add_ensure_iseq(LINK_ANCHOR *ret, rb_iseq_t *iseq, int is_return)
}
static VALUE
setup_args(rb_iseq_t *iseq, LINK_ANCHOR *args, NODE *argn, VALUE *flag)
setup_args(rb_iseq_t *iseq, LINK_ANCHOR *args, NODE *argn, unsigned int *flag)
{
VALUE argc = INT2FIX(0);
int nsplat = 0;
@ -4015,7 +4015,7 @@ iseq_compile_each(rb_iseq_t *iseq, LINK_ANCHOR *ret, NODE * node, int poped)
case NODE_OP_ASGN1: {
DECL_ANCHOR(args);
VALUE argc;
VALUE flag = 0;
unsigned int flag = 0;
VALUE asgnflag = 0;
ID id = node->nd_mid;
int boff = 0;
@ -4060,7 +4060,7 @@ iseq_compile_each(rb_iseq_t *iseq, LINK_ANCHOR *ret, NODE * node, int poped)
}
ADD_INSN1(ret, line, dupn, FIXNUM_INC(argc, 1 + boff));
flag |= asgnflag;
ADD_SEND_R(ret, line, idAREF, argc, Qfalse, LONG2FIX(flag));
ADD_SEND_R(ret, line, idAREF, argc, Qfalse, INT2FIX(flag));
if (id == 0 || id == 1) {
/* 0: or, 1: and
@ -4104,13 +4104,13 @@ iseq_compile_each(rb_iseq_t *iseq, LINK_ANCHOR *ret, NODE * node, int poped)
ADD_INSN(ret, line, pop);
}
ADD_SEND_R(ret, line, idASET,
argc, Qfalse, LONG2FIX(flag));
argc, Qfalse, INT2FIX(flag));
}
else {
if (boff > 0)
ADD_INSN(ret, line, swap);
ADD_SEND_R(ret, line, idASET,
FIXNUM_INC(argc, 1), Qfalse, LONG2FIX(flag));
FIXNUM_INC(argc, 1), Qfalse, INT2FIX(flag));
}
ADD_INSN(ret, line, pop);
ADD_INSNL(ret, line, jump, lfin);
@ -4141,13 +4141,13 @@ iseq_compile_each(rb_iseq_t *iseq, LINK_ANCHOR *ret, NODE * node, int poped)
ADD_INSN(ret, line, pop);
}
ADD_SEND_R(ret, line, idASET,
argc, Qfalse, LONG2FIX(flag));
argc, Qfalse, INT2FIX(flag));
}
else {
if (boff > 0)
ADD_INSN(ret, line, swap);
ADD_SEND_R(ret, line, idASET,
FIXNUM_INC(argc, 1), Qfalse, LONG2FIX(flag));
FIXNUM_INC(argc, 1), Qfalse, INT2FIX(flag));
}
ADD_INSN(ret, line, pop);
}
@ -4398,7 +4398,7 @@ iseq_compile_each(rb_iseq_t *iseq, LINK_ANCHOR *ret, NODE * node, int poped)
DECL_ANCHOR(args);
ID mid = node->nd_mid;
VALUE argc;
VALUE flag = 0;
unsigned int flag = 0;
VALUE parent_block = iseq->compile_data->current_block;
iseq->compile_data->current_block = Qfalse;
@ -4499,7 +4499,7 @@ iseq_compile_each(rb_iseq_t *iseq, LINK_ANCHOR *ret, NODE * node, int poped)
}
ADD_SEND_R(ret, line, mid,
argc, parent_block, LONG2FIX(flag));
argc, parent_block, INT2FIX(flag));
if (poped) {
ADD_INSN(ret, line, pop);
@ -4510,7 +4510,7 @@ iseq_compile_each(rb_iseq_t *iseq, LINK_ANCHOR *ret, NODE * node, int poped)
case NODE_ZSUPER:{
DECL_ANCHOR(args);
int argc;
VALUE flag = 0;
unsigned int flag = 0;
VALUE parent_block = iseq->compile_data->current_block;
INIT_ANCHOR(args);
@ -4699,7 +4699,7 @@ iseq_compile_each(rb_iseq_t *iseq, LINK_ANCHOR *ret, NODE * node, int poped)
case NODE_YIELD:{
DECL_ANCHOR(args);
VALUE argc;
VALUE flag = 0;
unsigned int flag = 0;
INIT_ANCHOR(args);
if (iseq->type == ISEQ_TYPE_TOP) {
@ -5354,7 +5354,7 @@ iseq_compile_each(rb_iseq_t *iseq, LINK_ANCHOR *ret, NODE * node, int poped)
case NODE_ATTRASGN:{
DECL_ANCHOR(recv);
DECL_ANCHOR(args);
VALUE flag = 0;
unsigned int flag = 0;
VALUE argc;
int asgnflag;
@ -5418,7 +5418,7 @@ iseq_compile_each(rb_iseq_t *iseq, LINK_ANCHOR *ret, NODE * node, int poped)
ADD_SEQ(ret, recv);
ADD_SEQ(ret, args);
}
ADD_SEND_R(ret, line, node->nd_mid, argc, 0, LONG2FIX(flag));
ADD_SEND_R(ret, line, node->nd_mid, argc, 0, INT2FIX(flag));
ADD_INSN(ret, line, pop);
break;
@ -5834,7 +5834,7 @@ iseq_build_from_ary_body(rb_iseq_t *iseq, LINK_ANCHOR *anchor,
ID mid = 0;
int orig_argc = 0;
VALUE block = 0;
unsigned long flag = 0;
unsigned int flag = 0;
if (!NIL_P(op)) {
VALUE vmid = rb_hash_aref(op, ID2SYM(rb_intern("mid")));
@ -5843,7 +5843,7 @@ iseq_build_from_ary_body(rb_iseq_t *iseq, LINK_ANCHOR *anchor,
VALUE vblock = rb_hash_aref(op, ID2SYM(rb_intern("blockptr")));
if (!NIL_P(vmid)) mid = SYM2ID(vmid);
if (!NIL_P(vflag)) flag = NUM2ULONG(vflag);
if (!NIL_P(vflag)) flag = NUM2UINT(vflag);
if (!NIL_P(vorig_argc)) orig_argc = FIX2INT(vorig_argc);
if (!NIL_P(vblock)) block = iseq_build_load_iseq(iseq, vblock);
}

2
include/ruby/ruby.h
View file

@ -775,7 +775,7 @@ struct RObject {
struct RBasic basic;
union {
struct {
long numiv;
long numiv; /* only uses 32-bits */
VALUE *ivptr;
struct st_table *iv_index_tbl; /* shortcut for RCLASS_IV_INDEX_TBL(rb_obj_class(obj)) */
} heap;

4
variable.c
View file

@ -1173,6 +1173,10 @@ rb_ivar_set(VALUE obj, ID id, VALUE val)
iv_index_tbl->num_entries < (st_index_t)newsize) {
newsize = iv_index_tbl->num_entries;
}
/* never happens in practice: */
if (newsize > INT_MAX) rb_memerror();
if (RBASIC(obj)->flags & ROBJECT_EMBED) {
newptr = ALLOC_N(VALUE, newsize);
MEMCPY(newptr, ptr, VALUE, len);

9
vm_core.h
View file

@ -140,11 +140,9 @@ struct rb_control_frame_struct;
typedef struct rb_call_info_struct {
/* fixed at compile time */
ID mid;
VALUE flag;
rb_iseq_t *blockiseq;
unsigned int flag;
int orig_argc;
int argc; /* temporary for method calling */
rb_iseq_t *blockiseq;
/* inline cache: keys */
rb_serial_t method_state;
@ -158,9 +156,10 @@ typedef struct rb_call_info_struct {
/* temporary values for method calling */
struct rb_block_struct *blockptr;
VALUE recv;
int argc;
union {
int opt_pc; /* used by iseq */
long index; /* used by ivar */
int index; /* used by ivar */
int missing_reason; /* used by method_missing */
int inc_sp; /* used by cfunc */
} aux;

4
vm_insnhelper.c
View file

@ -498,7 +498,7 @@ vm_getivar(VALUE obj, ID id, IC ic, rb_call_info_t *ci, int is_attr)
if (LIKELY((!is_attr && ic->ic_serial == RCLASS_SERIAL(klass)) ||
(is_attr && ci->aux.index > 0))) {
long index = !is_attr ? (long)ic->ic_value.index : ci->aux.index - 1;
int index = !is_attr ? (int)ic->ic_value.index : ci->aux.index - 1;
long len = ROBJECT_NUMIV(obj);
VALUE *ptr = ROBJECT_IVPTR(obj);
@ -522,7 +522,7 @@ vm_getivar(VALUE obj, ID id, IC ic, rb_call_info_t *ci, int is_attr)
ic->ic_serial = RCLASS_SERIAL(klass);
}
else { /* call_info */
ci->aux.index = index + 1;
ci->aux.index = (int)index + 1;
}
}
}