stpd and stdout

[Hien Nguyen]

Martin Hunt wrote:

>I think that in this case (stdout from procfs) it should always be
>line-buffered. No option is necessary.  In fact I tried it and couldn't
>measure any significant performance advantage for full buffering.  I've
>gone ahead and committed the following patch.  Let me know how it works.
>
>Index: librelay.c
>===================================================================
>RCS file: /cvs/systemtap/src/runtime/stpd/librelay.c,v
>retrieving revision 1.37
>diff -u -r1.37 librelay.c
>--- librelay.c  8 Apr 2006 21:59:36 -0000       1.37
>+++ librelay.c  18 May 2006 17:51:31 -0000
>@@ -722,6 +722,7 @@
>        int type;
>        FILE *ofp = stdout;
>
>+       setvbuf(ofp, (char *)NULL, _IOLBF, 0);
>        pthread_mutex_init(&processing_mutex, NULL);
>
>        signal(SIGINT, sigproc);
>
>
>  
>
Thanks Martin, it works.