[Tarantool-patches] [PATCH luajit] Actually implement maxirconst trace limit.

[Igor Munkin]

Sergey,

On 28.01.22, Sergey Kaplun wrote:
> Igor,
> 
> Thanks for the review!
> 

<snipped>

> > > 
> > > Issue: https://github.com/LuaJIT/LuaJIT/issues/430
> > > Branch: https://github.com/tarantool/luajit/tree/skaplun/lj-430-maxirconst-actually-implement-full-ci
> > > Tarantool branch: https://github.com/tarantool/tarantool/tree/skaplun/lj-430-maxirconst-actually-implement-full-ci
> > > 
> > >  src/lj_record.c                               |  5 ++-
> > >  .../lj-430-maxirconst.test.lua                | 43 +++++++++++++++++++
> > >  2 files changed, 46 insertions(+), 2 deletions(-)
> > >  create mode 100644 test/tarantool-tests/lj-430-maxirconst.test.lua
> > > 
> > 
> > <snipped>
> > 
> > > diff --git a/test/tarantool-tests/lj-430-maxirconst.test.lua b/test/tarantool-tests/lj-430-maxirconst.test.lua
> > > new file mode 100644
> > > index 00000000..1829b37d
> > > --- /dev/null
> > > +++ b/test/tarantool-tests/lj-430-maxirconst.test.lua
> > > @@ -0,0 +1,43 @@
> > > +-- XXX: avoid any other traces compilation due to hotcount
> > > +-- collisions for predictible results.

<snipped>

> > > +jit.off()
> > > +jit.flush()
> > 
> > Minor: I'd rather move this part closer to 'jit.opt.start' to save the
> > test structure closer to the other test chunks. Feel free to ignore.
> 
> I really want to exclude __any__ JIT work here to avoid false-positive
> hotcount (was precendents during writing this test :)). Ignoring.

OK, got it.

> 

<snipped>

> > > +test:ok(ntrace_old + 1 == misc.getmetrics().jit_trace_num,
> > > +	'trace number increases')
> > 
> > Typo: I doubt we use tabs in Lua sources, but I might be wrong...
> 
> I suggest to use quarter tabs indent style as we use for C code and Mike
> use in src/jit/*.lua (see bcsave.lua for example).
> 
> There was no precedent before, IINM :).

See test/tarantool-tests/lj-695-ffi-vararg-call.test.lua[1].

> 
> > 
> > > +
> > > +ntrace_old = misc.getmetrics().jit_trace_num
> > > +jit.on()
> > > +irconst4()
> > > +irconst4()
> > > +jit.off()
> > > +test:ok(ntrace_old == misc.getmetrics().jit_trace_num,
> > > +	'trace number is the same')
> > 
> > Ditto.
> > 
> > > +
> > > +os.exit(test:check() and 0 or 1)
> > > -- 
> > > 2.34.1
> > > 
> > 
> > -- 
> > Best regards,
> > IM
> 
> -- 
> Best regards,
> Sergey Kaplun

[1]: https://github.com/tarantool/luajit/blob/tarantool/test/tarantool-tests/lj-695-ffi-vararg-call.test.lua

-- 
Best regards,
IM