All Forums  Origin Forum for Programming  Forum for Origin C  time taken to read the information present in pipe

Note: You must be registered in order to post a reply.
To register, click here. Registration is FREE!

Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Anti-Spam Code: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by ujnam[/i] [br]Origin Version (Select Help-->About Origin): Operating System:RedHat Linux 8 gettimeofday(&tv1,&tz); if( (fp = popen("df -m .","r")) == NULL) { printf("Not able to execute the command 'df -m'\n"); return 2; } memset(&tv2,0,sizeof(tv2)); memset(&tz,0,sizeof(tz)); gettimeofday(&tv2,&tz); printf("the time taken to execute df command is %ld - %ld = %ld\n", tv2.tv_usec, tv1.tv_usec,(tv2.tv_usec - tv1.tv_usec)); /* reading the output of the 'df -m' from the pipe */ memset(&tv1,0,sizeof(tv1)); memset(&tv2,0,sizeof(tv2)); memset(&tz,0,sizeof(tz)); gettimeofday(&tv1,&tz); fgets(buf,sizeof(buf),fp); memset(buf,0,sizeof(buf)); fgets(buf,sizeof(buf),fp); memset(&tz,0,sizeof(tz)); gettimeofday(&tv2,&tz); printf("time taken to read the information from the pipe written by popen is %ld - %ld = %ld\n",tv2.tv_usec,tv1.tv_usec,(tv2.tv_usec - tv1.tv_usec)); pclose(fp); When the above snippet of code is embedded in one of the server coding, we get the time taken to read the information from pipe is around 9000 micro seconds, but when i run same snippet of code as a simple program, i get the time taken to read the information from the pipe about 50-60 micro seconds, can i know what might be the reason? [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.