python - increase tcp receive window on linux -



python - increase tcp receive window on linux -

similar setting tcp receive window in c , working tcpdump in linux , why changing value of so_rcvbuf doesn't work?, i'm unable increase initial tcp receive window greater 5888 on ubuntu linux 2.6.32-45

#!/usr/bin/python socket import socket, sol_socket, so_rcvbuf, tcp_window_clamp sock = socket() sock.setsockopt(sol_socket, so_rcvbuf, 65536) sock.setsockopt(sol_socket, tcp_window_clamp, 32768) sock.connect(('google.com', 80))

tcpdump says:

me > google: flags [s], seq 3758517838, win 5840, options [mss 1460,sackok,ts val 879735044 ecr 0,nop,wscale 6], length 0 google > me: flags [s.], seq 597037042, ack 3758517839, win 62392, options [mss 1430,sackok,ts val 541301157 ecr 879735044,nop,wscale 6], length 0 me > google: flags [.], ack 1, win 92, options [nop,nop,ts val 879735051 ecr 541301157], length 0

sysctl -a | grep net.*mem says:

net.core.wmem_max = 131071 net.core.rmem_max = 131071 net.core.wmem_default = 112640 net.core.rmem_default = 112640 net.core.optmem_max = 10240 net.ipv4.igmp_max_memberships = 20 net.ipv4.tcp_mem = 77376 103168 154752 net.ipv4.tcp_wmem = 4096 16384 3301376 net.ipv4.tcp_rmem = 4096 87380 3301376 net.ipv4.udp_mem = 77376 103168 154752 net.ipv4.udp_rmem_min = 4096 net.ipv4.udp_wmem_min = 4096

could there else putting receive window limit on connection?

that looks effects of tcp slow-start. kernel thread 2008 offers explanation (i've linked lastly response in thread):

so_rcvbuf doesn't alter receiver advertised window

if maintain watching stream, window size should increase, maximum set.

python sockets tcp tcpdump setsockopt

Comments

Post a Comment

Popular posts from this blog

web services - java.lang.NoClassDefFoundError: Could not initialize class net.sf.cglib.proxy.Enhancer -

web services - java.lang.NoClassDefFoundError: Could not initialize class net.sf.cglib.proxy.Enhancer - when trying request rest service @ time of response getting exception.. feb 21, 2013 2:34:49 pm com.sun.jersey.spi.container.containerresponse mapmappablecontainerexception severe: exception contained within mappablecontainerexception not mapped response, re-throwing http container java.lang.noclassdeffounderror: not initialize class net.sf.cglib.proxy.enhancer @ org.hibernate.proxy.pojo.cglib.cgliblazyinitializer.getproxyfactory(cgliblazyinitializer.java:117) @ org.hibernate.proxy.pojo.cglib.cglibproxyfactory.postinstantiate(cglibproxyfactory.java:43) @ org.hibernate.tuple.entity.pojoentitytuplizer.buildproxyfactory(pojoentitytuplizer.java:162) @ org.hibernate.tuple.entity.abstractentitytuplizer.<init>(abstractentitytuplizer.java:135) @ org.hibernate.tuple.entity.pojoentitytuplizer.<init>(pojoentitytuplizer.java:55) @ org.hibernate.tuple.e...
Read more

Accessing MATLAB's unicode strings from C -

Accessing MATLAB's unicode strings from C - how can access underlying unicode info of matlab strings through matlab engine or mex c interfaces? here's example. let's set unicode characters in utf-8 encoded file test.txt, read as fid=fopen('test.txt','r','l','utf-8'); s=fscanf(fid, '%s') in matlab. now if first feature('defaultcharacterset', 'utf-8') , c engevalstring(ep, "s") , output text file utf-8. proves matlab stores unicode internally. if mxarraytostring(enggetvariable(ep, "s")) , unicode2native(s, 'latin-1') give me in matlab: non-latin-1 characters replaced character code 26. need getting access underlying unicode info c string in unicode format (utf-8, utf-16, etc.), , preserving non-latin-1 characters. is possible? my platform os x, matlab r2012b. addendum: documentation explicitly states "[mxarraytostring()] supports multibyte encoded characters...
Read more

javascript - mongodb won't find my schema method in nested container -

javascript - mongodb won't find my schema method in nested container - i trying access method of schema stored within mixed container. here situation : have cases model can many different things, have schema each of these things stored in "casecontent" mixed property. var caseschema = mongoose.schema({ casecontent : {}, object : {type:string, default : "null"}, collision : {type : boolean, default : false} }); the casecontent property filled model of 1 of schemas, 1 exemple : var treeschema = new mongoose.schema({ applecount : {type : number, default : 3} }); treeschema.methods.dostuff = function (data) { console.log('hey, listen'); homecoming true; }; then, want utilize method of schema original container : caseschema.methods.dostuff = function (data) { if (this.casecontent.dostuff !== undefined) { this.casecontent.dostuff(); console.log('it worked'); } else { ...
Read more