The problem is not with cURL. I have also run into these problems using cURL. I recoded using sockets and epoll and got the same results. The problem is with the TCP/IP stack.
On Wed, Jun 1, 2022 at 1:46 PM Aleh Linkin via curl-library < curl-library@lists.haxx.se> wrote: > 1. easy_handles > ``` > SET_OPT(CURLOPT_ERRORBUFFER, m_errorBuffer); > setVerbose(true); > setUrl(url); > setTimeout(timeout); > setConnectTimeout(connectTimeout); > setProxy(proxy); > setProxyPort(proxyPort); > setHttpHeaders(httpHeaders); > SET_OPT(CURLOPT_WRITEFUNCTION, writeFunction); > SET_OPT(CURLOPT_WRITEDATA, m_requestState); > SET_OPT(CURLOPT_DEBUGFUNCTION, CurlRequest::debugFunction); > SET_OPT(CURLOPT_DEBUGDATA, this); > SET_OPT(CURLOPT_PRIVATE, this); > SET_OPT(CURLOPT_NOSIGNAL, 1L); > ``` > > 2. HTTPS. TLS based on NSS SSL backend > > 3. Yes. I've used perf and valgrind-cachgrind but I can't take the reason > from results. For example perf part: > ``` > Samples: 1K of event 'cycles:uppp', Event count (approx.): 9397031894 > Children Self Command Shared Object Symbol > - 23.25% 2.43% lecappqry.1 [unknown] [.] > 0000000000000000 > - 21.58% 0 > 5.29% _int_malloc > 1.42% free > 1.13% Curl_http > 1.07% _int_free > + 0.88% __clock_gettime > 0.72% _IO_vsnprintf > 0.71% __libc_calloc > + 5.07% 0.00% lecappqry.1 [unknown] [k] > 0x0000000000667849 > + 5.07% 0.00% lecappqry.1 [unknown] [k] > 0x00007f33507ad900 > + 5.07% 4.87% lecappqry.1 lecappqry_grpc [.] > dprintf_formatf > + 4.88% 4.71% lecappqry.1 libc-2.17.so [.] _int_free ``` > > On Mon, May 30, 2022 at 9:07 PM Patrick Schlangen <patr...@schlangen.me> > wrote: > >> Am 30.05.2022 um 16:23 schrieb Aleh Linkin via curl-library < >> curl-library@lists.haxx.se>: >> > >> > I understand. Thank you. >> > But why multi_socket_action eats about twice time more CPU then >> curl_multi_perform called in cycle with 10ms pause? >> >> Can you supply some more details about how the easy handle is configured >> and the type of transfers you are running? Is it HTTP? Are you using TLS? >> Did you use perf or a similar profiler yet to see where time is spent? >> >> Thanks, >> >> Patrick >> >> -- > Unsubscribe: https://lists.haxx.se/listinfo/curl-library > Etiquette: https://curl.haxx.se/mail/etiquette.html >
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