TCB size in ix86 L4

[Torsten Paul]

Michael Hohmuth <hohmuth at innocent.com> writes:

> can't meet real-time requirements; the task_delete operation seems to
> be especially bad, sometimes disabling interrupts for more than one
> second.
> 
Yes, the measurements showed interrupt a latency of sometimes 1.5
seconds (even if the interrupt thread had the highest priority) when
in the L4-Linux System had to serve a lot of calls to fork/exec. This
was tested with the lat_proc benchmark from the lmbench-suite that
tries to measure the latency for creating simple processes (that only
call exit)

Still there is only one explanation for this: disabled interrupts
while flushing the complete address space of a task when doing
task_delete.

ciao,
  Torsten.


-- 
Torsten Paul				Es ist leichter, einen Atomkern zu
paul at os.inf.tu-dresden.de	//		spalten als ein Vorurteil.
__________________________ooO_(+ +)_Ooo________Albert Einstein_(1879-1955)
				U