Hi
I've done some test with cyclictest on -rt13 and -r14, and I'm surprise of the result.
To do this test, I've installed a -rt13 and -rt14 on a box, rebooted on a kernel,
and run this command (no other command). Of course, the .config is the same for both kernel.
On -rt13, I've got this :
[trem@localhost rt-tests]$ sudo ./cyclictest -t 1 -p 80 -n -i 10000 -l 100000
1.00 0.97 0.69 1/158 4177
T: 0 ( 4177) P:80 I:10000 C: 100000 Min: 1 Act: 2 Avg: 2 Max: 10
On -rt14, I4ve got this :
[trem@localhost rt-tests]$ sudo ./cyclictest -t 1 -p 80 -n -i 10000 -l 100000
1.00 0.97 0.70 1/158 4132
T: 0 ( 4125) P:80 I:10000 C: 100000 Min: 1 Act: 6 Avg: 2 Max: 17
The Max is clearly higher on -rt14.
regards,
Philippe (trem)
Steven Rostedt a écrit :
We are pleased to announce the 2.6.24.7-rt14 tree, which can be
downloaded from the location:
http://rt.et.redhat.com/download/
Information on the RT patch can be found at:
http://rt.wiki.kernel.org/index.php/Main_Page
Changes since 2.6.24.7-rt13
- rwlock pi_lock fixes on waking up multiple readers (Steven Rostedt)
- revert adaptive locks from RCU (Thomas Gleixner)
[ for some reason, using RCU causes some latency spikes, this
may be a sign of something going wrong in RCU itself ]
- rwlock mutex owner fix for waking up reader with readers held (Steven Rostedt)
- rwlock remove waiter from pi_list on above fix (Steven Rostedt and
Thomas Gleixner)
- rwlock replace macro with inline (Thomas Gleixner)
- rwlock pending namespace updates (Thomas Gleixner)
- rwlock debug check (Thomas Gleixner)
- futex fix fault (Thomas Gleixner)
- x86_64 fix copy user (Linus Torvalds)
to build a 2.6.24.7-rt14 tree, the following patches should be applied:
http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.24.tar.bz2
http://kernel.org/pub/linux/kernel/v2.6/patch-2.6.24.7.bz2
http://rt.et.redhat.com/download/patch-2.6.24.7-rt14.bz2
And like always, my RT version of Matt Mackall's ketchup will get this
for you nicely:
http://people.redhat.com/srostedt/rt/tools/ketchup-0.9.8-rt3
The broken out patches are also available.
-- Steve
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