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Re: curl-multi-socket interface too slow
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From: Aleksandar Lazic via curl-library <curl-library_at_lists.haxx.se>
Date: Tue, 31 May 2022 16:57:30 +0200
Hi Oleg.
On 31.05.22 16:17, Aleh Linkin wrote:
> Version 7.83
Please keep the list in the loop.
Regards
Alex
> On Tue, May 31, 2022 at 12:09 PM Aleksandar Lazic <al-curllibrary_at_none.at <mailto:al-curllibrary_at_none.at>> wrote:
>
> On Mon, 30 May 2022 13:39:15 +0300
> Aleh Linkin via curl-library <curl-library_at_lists.haxx.se <mailto:curl-library_at_lists.haxx.se>> wrote:
>
> > Hi, developers!
> > I have application with libcurl uses simple multi interface and do 1500
> > requests per second without any problems with about 35% CPU.
> > I've decided to try curl_multi_socket interface because "it also offers a
> > much more high-performance API that will make a significant difference for
> > applications using large numbers of simultaneous connections."
> > My application uses epoll so I've created code based on it and
> > ephiperfifio. example.
> > As a result my application can't handle 1500 requests per second and starts
> > failing them with timeout. Moreover it uses much more CPU (50% on 1500 RPS).
> > I guess that I do something wrong but can't find the problem.
> > Could you help me, please?
> >
> > My code here: https://godbolt.org/z/Gb4Gn3jro <https://godbolt.org/z/Gb4Gn3jro>
>
> I have tried to compile it but got compile error.
>
> ```
> # Compilation provided by Compiler Explorer at https://godbolt.org/ <https://godbolt.org/>
> <Compilation failed>
> # Compiler exited with result code 1
> .
> .
> .
> .
> ```
>
> Please can you tell us which version is in use.
>
> Maybe you can post the output of this line.
>
> ```
> csDebug(ERROR_LVL, "%s: curl_version_info() failed", __func__);
> ```
>
> > Sincerely,
> > Oleg
>
> Regards
> Alex
>
Date: Tue, 31 May 2022 16:57:30 +0200
Hi Oleg.
On 31.05.22 16:17, Aleh Linkin wrote:
> Version 7.83
Please keep the list in the loop.
Regards
Alex
> On Tue, May 31, 2022 at 12:09 PM Aleksandar Lazic <al-curllibrary_at_none.at <mailto:al-curllibrary_at_none.at>> wrote:
>
> On Mon, 30 May 2022 13:39:15 +0300
> Aleh Linkin via curl-library <curl-library_at_lists.haxx.se <mailto:curl-library_at_lists.haxx.se>> wrote:
>
> > Hi, developers!
> > I have application with libcurl uses simple multi interface and do 1500
> > requests per second without any problems with about 35% CPU.
> > I've decided to try curl_multi_socket interface because "it also offers a
> > much more high-performance API that will make a significant difference for
> > applications using large numbers of simultaneous connections."
> > My application uses epoll so I've created code based on it and
> > ephiperfifio. example.
> > As a result my application can't handle 1500 requests per second and starts
> > failing them with timeout. Moreover it uses much more CPU (50% on 1500 RPS).
> > I guess that I do something wrong but can't find the problem.
> > Could you help me, please?
> >
> > My code here: https://godbolt.org/z/Gb4Gn3jro <https://godbolt.org/z/Gb4Gn3jro>
>
> I have tried to compile it but got compile error.
>
> ```
> # Compilation provided by Compiler Explorer at https://godbolt.org/ <https://godbolt.org/>
> <Compilation failed>
> # Compiler exited with result code 1
> .
> .
> .
> .
> ```
>
> Please can you tell us which version is in use.
>
> Maybe you can post the output of this line.
>
> ```
> csDebug(ERROR_LVL, "%s: curl_version_info() failed", __func__);
> ```
>
> > Sincerely,
> > Oleg
>
> Regards
> Alex
>
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