Ya, it does seem to reproduce. Maybe the first step to investigating is to write a super-minimal Julia server that does nothing but listens for TCP connections, spawn a task which sends a fixed response on accepted connection, and then closes the socket.If that still has this problem, then it might relate to a low-level issue with tasks/libuv.
> On Oct 16, 2015, at 8:52 AM, nikolai.mar...@icloud.com wrote: > > Sure, here it is: https://github.com/JuliaWeb/HttpServer.jl/issues/78 > I hope you can reproduce this behaviour. > > Any ideas how to investigate it? > > On Friday, October 16, 2015 at 4:29:44 PM UTC+3, Jonathan Malmaud wrote: > Can you file this as an issue on https://github.com/JuliaWeb/HttpServer.jl > <https://github.com/JuliaWeb/HttpServer.jl>? > > On Friday, October 16, 2015 at 7:31:34 AM UTC-5, nikolai...@icloud.com <> > wrote: > Status update. > > I have updated to Julia 0.4 and added keep-alive support to HttpServer and > now ab -k works quite fine. > However when there is no keep-alive and each request is made in a separate > connection, then Julia still hangs around request #16k. > My first idea of how to profile it was this: > > using HttpServer > gc_enable(false) > const Z = "HELLO WORLD" > c = 0s = open("./prof.txt", "w") > http = HttpHandler() do req::Request, res::Response > global c r = Response(Z) c += 1 if c == 16000 > Profile.clear() > end if c > 16428 > c = 0 Profile.print(s, C=true, cols=500) close(s) end > rend > server = Server( http ) > @profile run( server, 8000 ) > > However the output I got is 19k lines long and I have no idea how to use it. > Here's a top of it: > 3 /private/tmp/julia20151012-99535-1c7kouk/src/builtins.c; jl_egal; line: > 3061 /private/tmp/julia20151012-99535-1c7kouk/src/builtins.c; jl_f_isa; > line: 3701 /private/tmp/julia20151012-99535-1c7kouk/src/gc.c; > jl_gc_alloc_3w; line: 23321 > /private/tmp/julia20151012-99535-1c7kouk/src/gf.c; jl_apply_generic; line: > 17111 /private/tmp/julia20151012-99535-1c7kouk/src/jltypes.c; jl_is_type; > line: 691 /private/tmp/julia20151012-99535-1c7kouk/src/jltypes.c; > jl_subtype_le; line: 25591683 > /private/tmp/julia20151012-99535-1c7kouk/src/task.c; jl_apply; line: 2415 > /private/tmp/julia20151012-99535-1c7kouk/src/task.c; throw_if_exception_set; > line: 2301 /usr/lib/system/libsystem_c.dylib; strlen; (unknown line)1 > /usr/lib/system/libsystem_kernel.dylib; __accept; (unknown line)1 > /usr/lib/system/libsystem_kernel.dylib; __ioctl; (unknown line)7 > /usr/lib/system/libsystem_kernel.dylib; close; (unknown line)26463 > /usr/lib/system/libsystem_kernel.dylib; kevent; (unknown line)4 > /usr/lib/system/libsystem_kernel.dylib; mach_timebase_info; (unknown line)1 > /usr/lib/system/libsystem_kernel.dylib; read; (unknown line)4 > /usr/lib/system/libsystem_kernel.dylib; shutdown; (unknown line)30 > /usr/lib/system/libsystem_kernel.dylib; write; (unknown line)39 > /usr/lib/system/libsystem_platform.dylib; _platform_bzero$VARIANT$Unknown; > (unknown line)2 /usr/lib/system/libsystem_platform.dylib; > _platform_memcmp; (unknown line)5 > /usr/lib/system/libsystem_platform.dylib; _platform_memmove$VARIANT$Unknown; > (unknown line)1 /usr/lib/system/libsystem_platform.dylib; > _platform_memset$VARIANT$Unknown; (unknown line)2 > /usr/lib/system/libsystem_platform.dylib; _setjmp; (unknown line)1 / > ...
