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Christian Grothoff
fe7ed03a63
performs far better on OS X and Solaris-style kernels Will Bryant (<will.bryant@gmail.com>) writes: On 21/09/2011, at 20:14 , Christian Grothoff wrote: > > On the OpenIndiana performance, do you have something like 'strace' where you > > could monitor what's going on? Most likely the code hangs blocking in some > > syscall for longer than it should... It has truss, and for the record, it showed no slow calls. The problem turned out to be the tests using "localhost", which was picking the primary interface for the box, not the loopback interface. Changing perf_get_concurrent.c to use 127.0.0.1 makes it vastly faster - it went from ~35 requests/sec to 12,000-15,000 requests/sec. It makes a big difference on OS X too - from 115-140 requests/sec on my old macbook to 600-3600 requests/sec (variation here mainly due to the large amount of other stuff I have running). Patch attached.
About ===== libmicrohttpd is a GNU library (part of the GNU project) written in C that provides a compact API and implementation of an HTTP 1.1 web server (HTTP 1.0 is also supported). libmicrohttpd only implements the HTTP 1.1 protocol. The main application must still provide the content. Installation ============ If you are using Subversion, run "autoreconf -fi" to create configure. In order to run the testcases, you need a recent version of libcurl. libcurl is not required if you just want to install the library. Especially for development, do use the MHD_USE_DEBUG option to get error messages. Configure options ================= If you are concerned about space, you should set "CFLAGS" to "-Os -fomit-frame-pointer" to have gcc generate tight code. You can use the following options to disable certain MHD features: --disable-https: no HTTPS / TLS / SSL support (significant reduction) --disable-messages: no error messages (they take space!) --disable-postprocessor: no MHD_PostProcessor API --disable-dauth: no digest authentication API The resulting binary should be about 30-40k depending on the platform. Portability =========== The latest version of libmicrohttpd will try to avoid SIGPIPE on its sockets. This should work on OS X, Linux and recent BSD systems (at least). On other systems that may trigger a SIGPIPE on send/recv, the main application should install a signal handler to handle SIGPIPE. libmicrohttpd should work well on GNU/Linux, BSD, OS X, W32 and z/OS. Note that HTTPS is not supported on z/OS (yet). We also have reports of users using it on vxWorks and Symbian. Note that on platforms where the compiler does not support the "constructor" attribute, you must call "MHD_init" before using any MHD functions and "MHD_fini" after you are done using MHD. Notes on compiling on z/OS: --------------------------- After extracting the archive, run iconv -f UTF-8 -t IBM-1047 contrib/ascebc > /tmp/ascebc.sh chmod +x /tmp/ascebc.sh for n in `find * -type f` do /tmp/ascebc.sh $n done to convert all source files to EBCDIC. Note that you must run "configure" from the directory where the configure script is located. Otherwise, configure will fail to find the "contrib/xcc" script (which is a wrapper around the z/OS c89 compiler). Development Status ================== This is a beta release. Below we list things that should be implemented (in order of importance) before we can claim to be reasonably complete. Untested features: ================== - add testcases for http/1.1 pipelining (need to figure out how to ensure curl pipelines -- and it seems libcurl has issues with pipelining, see http://curl.haxx.se/mail/lib-2007-12/0248.html) - add testcases for resource limit enforcement - add testcases for client queuing early response, suppressing 100 CONTINUE - extend testcase for chunked encoding to validate handling of footers - more testing for SSL support - MHD basic and digest authentication Functions not covered by "make check": ====================================== - file_reader (response.c); special case (sendfile) - mhd_panic_std (daemon.c); special case (abort) - parse_options (daemon.c) - MHD_set_panic_func (daemon.c) - MHD_get_version (daemon.c) Missing documentation: ====================== - manual: * document configuration options * document details on porting MHD (plibc, z/OS)