Buy commercial curl support from WolfSSL. We help you work
out your issues, debug your libcurl applications, use the API, port to new
platforms, add new features and more. With a team lead by the curl founder
himself.
Re: curl-multi-socket interface too slow
- Contemporary messages sorted: [ by date ] [ by thread ] [ by subject ] [ by author ] [ by messages with attachments ]
From: James Read via curl-library <curl-library_at_lists.haxx.se>
Date: Mon, 30 May 2022 14:47:40 +0100
On Mon, May 30, 2022 at 12:11 PM Aleh Linkin via curl-library <
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?
>
I've been working on this problem for years now and haven't got much of any
useful response from this list. I have come to believe the problem is with
the TCP/IP stack and not the epoll based code.
James Read
>
> My code here: https://godbolt.org/z/Gb4Gn3jro
>
> Sincerely,
> Oleg
>
> --
> Unsubscribe: https://lists.haxx.se/listinfo/curl-library
> Etiquette: https://curl.haxx.se/mail/etiquette.html
>
Date: Mon, 30 May 2022 14:47:40 +0100
On Mon, May 30, 2022 at 12:11 PM Aleh Linkin via curl-library <
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?
>
I've been working on this problem for years now and haven't got much of any
useful response from this list. I have come to believe the problem is with
the TCP/IP stack and not the epoll based code.
James Read
>
> My code here: https://godbolt.org/z/Gb4Gn3jro
>
> Sincerely,
> Oleg
>
> --
> Unsubscribe: https://lists.haxx.se/listinfo/curl-library
> Etiquette: https://curl.haxx.se/mail/etiquette.html
>
-- Unsubscribe: https://lists.haxx.se/listinfo/curl-library Etiquette: https://curl.haxx.se/mail/etiquette.htmlReceived on 2022-05-30