> > The reason for no looping is ... loop became long, or even worse, > > infinite, your system would be hosed. > > > > The reason for no if/else construct is because each probe clause must > > produce a fixed length trace record. > > I always thought that it's deliberate way of torturing us, the users :) >
Amen to that! Am I an experienced user of DTrace who understands why we don't need flow control, or am I a lemming rationalizing what I've been taught to live with? To quote the USENIX paper (http://www.sun.com/bigadmin/content/dtrace/dtrace_usenix.pdf), "To prevent DIF from inducing an infinite loop in probe context, only forward branches are permitted. This safety provision may seem draconian — it eliminates loops altogether — but in practice we have not discovered it to present a serious limitation." But this is now becoming philosophical. ;-) Chip _______________________________________________ dtrace-discuss mailing list dtrace-discuss@opensolaris.org
