From: Sergey Ostanevich <sergos@tarantool.org>
To: Sergey Kaplun <skaplun@tarantool.org>
Cc: tarantool-patches@dev.tarantool.org
Subject: Re: [Tarantool-patches] [PATCH luajit v2 5/7] core: introduce memory profiler
Date: Sun, 27 Dec 2020 16:27:43 +0300 [thread overview]
Message-ID: <799CAEFC-C0C2-49B2-A695-0E2AE4AA55AD@tarantool.org> (raw)
In-Reply-To: <20201227115405.GA14702@root>
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LGTM
Sergos
> On 27 Dec 2020, at 14:54, Sergey Kaplun <skaplun@tarantool.org> wrote:
>
> Hi, Sergos!
>
> Thanks for the review!
>
> On 27.12.20, Sergey Ostanevich wrote:
>> Hi!
>>
>> Thanks for the patch! Just one question below, looks good otherwise.
>>
>> Sergos
>>
>>> diff --git a/src/lj_memprof.c b/src/lj_memprof.c
>>> new file mode 100644
>>> index 0000000..e0df057
>>> --- /dev/null
>>> +++ b/src/lj_memprof.c
>> <snipped>
>>> +static int memprof_stop(const struct lua_State *L)
>>> +{
>>> + struct memprof *mp = &memprof;
>>> + struct alloc *oalloc = &mp->orig_alloc;
>>> + struct lj_wbuf *out = &mp->out;
>>> + int return_status = PROFILE_SUCCESS;
>>> + int saved_errno = 0;
>>> + struct lua_State *main_L;
>>> + int cb_status;
>>> +
>>> + memprof_lock();
>>> +
>>> + if (mp->state == MPS_HALT) {
>>> + errno = mp->saved_errno;
>>> + mp->state = MPS_IDLE
>>> + memprof_unlock();
>>> + return PROFILE_ERRIO;
>>> + }
>>> +
>>> + if (mp->state != MPS_PROFILE) {
>>> + memprof_unlock();
>>> + return PROFILE_ERRRUN;
>>> + }
>>> +
>>
>>> + if (L != NULL && mp->g != G(L)) {
>>> + memprof_unlock();
>>> + return PROFILE_ERR;
>>> + }
>>> +
>>> + mp->state = MPS_IDLE;
>>> +
>>> + lua_assert(mp->g != NULL);
>>> + main_L = mainthread(mp->g);
>>> +
>>> + lua_assert(memprof_allocf == lua_getallocf(main_L, NULL));
>>> + lua_assert(oalloc->allocf != NULL);
>>> + lua_assert(oalloc->state != NULL);
>>> + lua_setallocf(main_L, oalloc->allocf, oalloc->state);
>>> +
>>> + if (LJ_UNLIKELY(lj_wbuf_test_flag(out, STREAM_STOP))) {
>>> + lua_assert(lj_wbuf_test_flag(out, STREAM_ERR_IO));
>>> + mp->state = MPS_HALT;
>>> + /* on_stop call may change errno value. */
>>> + mp->saved_errno = lj_wbuf_errno(out);
>>> + /* Ignore possible errors. mp->opt.buf == NULL here. */
>>> + mp->opt.on_stop(mp->opt.ctx, mp->opt.buf);
>>> + lj_wbuf_terminate(out);
>>> + memprof_unlock();
>>> + return PROFILE_ERRIO;
>>> + }
>>> + lj_wbuf_addbyte(out, LJM_EPILOGUE_HEADER);
>>> +
>>> + lj_wbuf_flush(out);
>>> +
>>> + cb_status = mp->opt.on_stop(mp->opt.ctx, mp->opt.buf);
>>> + if (LJ_UNLIKELY(lj_wbuf_test_flag(out, STREAM_ERR_IO) || cb_status != 0)) {
>>> + saved_errno = lj_wbuf_errno(out);
>>
>> Previous return of PROFILE_ERRIO causes MPS_HALT. Should it be the same?
>
> Yes, you're right! Previous MPS_HALT is redundant -- profiler anyway
> should stop (IDLE) immediately, there is no reason to set HALT there.
> Thanks! Fixed!
>
> See the iterative diff below. Branch is force-pushed.
>
>>
>>> + return_status = PROFILE_ERRIO;
>>> + }
>>> +
>>> + lj_wbuf_terminate(out);
>>> +
>>> + memprof_unlock();
>>> + errno = saved_errno;
>>> + return return_status;
>>> +}
>>
>
> ===================================================================
> diff --git a/src/lj_memprof.c b/src/lj_memprof.c
> index e0df057..998cbea 100644
> --- a/src/lj_memprof.c
> +++ b/src/lj_memprof.c
> @@ -354,13 +354,13 @@ static int memprof_stop(const struct lua_State *L)
>
> if (LJ_UNLIKELY(lj_wbuf_test_flag(out, STREAM_STOP))) {
> lua_assert(lj_wbuf_test_flag(out, STREAM_ERR_IO));
> - mp->state = MPS_HALT;
> /* on_stop call may change errno value. */
> - mp->saved_errno = lj_wbuf_errno(out);
> + saved_errno = lj_wbuf_errno(out);
> /* Ignore possible errors. mp->opt.buf == NULL here. */
> mp->opt.on_stop(mp->opt.ctx, mp->opt.buf);
> lj_wbuf_terminate(out);
> memprof_unlock();
> + errno = saved_errno;
> return PROFILE_ERRIO;
> }
> lj_wbuf_addbyte(out, LJM_EPILOGUE_HEADER);
> ===================================================================
>
> --
> Best regards,
> Sergey Kaplun
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next prev parent reply other threads:[~2020-12-27 13:27 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-25 15:26 [Tarantool-patches] [PATCH luajit v2 0/7] LuaJIT " Sergey Kaplun
2020-12-25 15:26 ` [Tarantool-patches] [PATCH luajit v2 1/7] utils: introduce leb128 reader and writer Sergey Kaplun
2020-12-25 21:42 ` Igor Munkin
2020-12-26 9:32 ` Sergey Kaplun
2020-12-26 13:57 ` Sergey Kaplun
2020-12-26 18:47 ` Sergey Ostanevich
2020-12-25 15:26 ` [Tarantool-patches] [PATCH luajit v2 2/7] core: introduce write buffer module Sergey Kaplun
2020-12-26 14:22 ` Igor Munkin
2020-12-26 15:26 ` Sergey Kaplun
2020-12-26 19:03 ` Sergey Ostanevich
2020-12-26 19:37 ` Sergey Kaplun
2020-12-28 1:43 ` Sergey Kaplun
2020-12-25 15:26 ` [Tarantool-patches] [PATCH luajit v2 3/7] vm: introduce VM states for Lua and fast functions Sergey Kaplun
2020-12-26 19:07 ` Sergey Ostanevich
2020-12-27 23:48 ` Igor Munkin
2020-12-28 3:54 ` Sergey Kaplun
2020-12-25 15:26 ` [Tarantool-patches] [PATCH luajit v2 4/7] core: introduce new mem_L field Sergey Kaplun
2020-12-26 19:12 ` Sergey Ostanevich
2020-12-26 19:42 ` Sergey Kaplun
2020-12-27 13:09 ` Igor Munkin
2020-12-27 17:44 ` Sergey Kaplun
2020-12-25 15:26 ` [Tarantool-patches] [PATCH luajit v2 5/7] core: introduce memory profiler Sergey Kaplun
2020-12-27 10:58 ` Sergey Ostanevich
2020-12-27 11:54 ` Sergey Kaplun
2020-12-27 13:27 ` Sergey Ostanevich [this message]
2020-12-27 16:44 ` Igor Munkin
2020-12-27 21:47 ` Sergey Kaplun
2020-12-25 15:26 ` [Tarantool-patches] [PATCH luajit v2 6/7] misc: add Lua API for " Sergey Kaplun
2020-12-27 11:54 ` Sergey Ostanevich
2020-12-27 13:42 ` Sergey Kaplun
2020-12-27 15:37 ` Sergey Ostanevich
2020-12-27 18:58 ` Igor Munkin
2020-12-28 0:14 ` Sergey Kaplun
2020-12-25 15:26 ` [Tarantool-patches] [PATCH luajit v2 7/7] tools: introduce a memory profile parser Sergey Kaplun
2020-12-26 22:56 ` Igor Munkin
2020-12-27 7:16 ` Sergey Kaplun
2020-12-28 5:30 ` Sergey Kaplun
2020-12-28 5:33 ` Igor Munkin
2020-12-28 6:28 ` Sergey Kaplun
2020-12-28 6:31 ` Igor Munkin
2020-12-27 13:24 ` Sergey Ostanevich
2020-12-27 16:02 ` Sergey Kaplun
2020-12-27 21:55 ` Sergey Ostanevich
2020-12-28 2:05 ` [Tarantool-patches] [PATCH luajit v3 2/2] misc: add Lua API for memory profiler Sergey Kaplun
2020-12-28 2:49 ` Igor Munkin
2020-12-28 5:19 ` Sergey Kaplun
2020-12-28 2:06 ` [Tarantool-patches] [PATCH luajit v3 1/2] core: introduce " Sergey Kaplun
2020-12-28 3:59 ` Igor Munkin
2020-12-28 4:05 ` [Tarantool-patches] [PATCH luajit v3 3/7] vm: introduce VM states for Lua and fast functions Sergey Kaplun
2020-12-28 5:14 ` Igor Munkin
2020-12-28 6:01 ` [Tarantool-patches] [PATCH luajit v2 0/7] LuaJIT memory profiler Alexander V. Tikhonov
2020-12-28 8:15 ` Igor Munkin
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