Messages in this thread | | | Date | Tue, 05 Nov 2002 21:33:01 -0700 | From | vanandel@ucar ... | Subject | please include LTT in the Linux kernel |
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Karim Yaghmour wrote: > Apparently Linus doesn't see what this patch buys Linux. Since > I can't personally convince him otherwise, having written LTT > myself, here it is in the hope that others on the list actually > find it of some use.
I am quite interested in having LTT as a configurable option in the Linux kernel. My company (the National Center for Atmospheric Research) uses networks of Linux computers to process data from weather radars. Occasionally, we've had unexplained performance problems where the system is slow to respond, even though the process load is low on each computer and no process is "hogging" the CPU. LTT would be extremely valuable to help us diagnose such problems, since we could see the interaction of our processing and radar display tasks with the kernel and the NFS daemons.
Also, we build Linux based data acquisition systems containing signal processing cards. LTT would really help us tune the performance of these systems, since we could see how quickly our processes are scheduled in response to interrupts from the signal processing cards.
Please, include LTT in the Linux kernel. Karim and others have demonstrated that LTT has no impact on kernel performance if it is not configured, and minimal impact even when tracing is enabled. I've used a commercial product (Stethoscope - sold by Real Time Innovations) when doing real-time programming on VxWorks, and found it quite valuable. If LTT is included in the Linux kernel, Linux will be much more appealing to the real-time and embedded programming community.
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