Stock 3.2.3-2 
Linux crappylappy.localdomain 3.2.3-2.fc16.x86_64 #1 SMP Fri Feb 3 20:08:08 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

no load: 
[root@crappylappy ~]# cyclictest -a -t -n -p99 -i100 -d50 -l1000000 -q
# /dev/cpu_dma_latency set to 0us
T: 0 ( 2007) P:99 I:100 C:1000000 Min:      4 Act:   16 Avg:   16 Max:    3328
T: 1 ( 2008) P:98 I:150 C: 666773 Min:      4 Act:   16 Avg:   19 Max:   16274

While under duress:
[root@crappylappy ~]# cyclictest -a -t -n -p99 -i100 -d50 -l1000000
# /dev/cpu_dma_latency set to 0us
policy: fifo: loadavg: 2.24 1.53 0.68 4/251 2413           

T: 0 ( 2367) P:99 I:100 C:1000000 Min:      4 Act:   16 Avg:   16 Max:    1894
T: 1 ( 2368) P:98 I:150 C: 666703 Min:      4 Act:   19 Avg:   16 Max:    1530



My 3.2.3-2 Preempt Kernel - 
Linux crappylappy.localdomain 3.2.3-2.lowlatency.fc16.x86_64 #1 SMP PREEMPT Wed Feb 8 22:58:16 PST 2012 x86_64 x86_64 x86_64 GNU/Linux

No Load:
[root@crappylappy ~]# cyclictest -a -t -n -p99 -i100 -d50 -l1000000 -q
# /dev/cpu_dma_latency set to 0us
T: 0 ( 1796) P:99 I:100 C:1000000 Min:      4 Act:   16 Avg:   16 Max:     612
T: 1 ( 1797) P:98 I:150 C: 666769 Min:      4 Act:   16 Avg:   16 Max:     274

While under duress:
[root@crappylappy ~]# cyclictest -a -t -n -p99 -i100 -d50 -l1000000 -q
# /dev/cpu_dma_latency set to 0us
T: 0 ( 2096) P:99 I:100 C:1000000 Min:      4 Act:    8 Avg:    7 Max:     571
T: 1 ( 2097) P:98 I:150 C: 666720 Min:      4 Act:    7 Avg:    7 Max:     576


CCRMA RT Kernel - 
Linux crappylappy.localdomain 3.0.17-1.rt33.1.fc16.ccrma.x86_64.rt #1 SMP PREEMPT RT Sat Jan 21 10:52:41 PST 2012 x86_64 x86_64 x86_64 GNU/Linux

No Load:
[root@crappylappy ~]# cyclictest -a -t -n -p99 -i100 -d50 -l1000000 -q
# /dev/cpu_dma_latency set to 0us
T: 0 ( 1872) P:99 I:100 C:1000000 Min:      6 Act:   26 Avg:   23 Max:      98
T: 1 ( 1873) P:98 I:150 C: 666682 Min:      6 Act:   20 Avg:   23 Max:      74

While under duress:
[root@crappylappy ~]# cyclictest -a -t -n -p99 -i100 -d50 -l1000000
# /dev/cpu_dma_latency set to 0us
policy: fifo: loadavg: 2.11 1.24 0.59 4/268 1998          

T: 0 ( 1981) P:99 I:100 C:1000000 Min:      5 Act:    9 Avg:   10 Max:      72
T: 1 ( 1982) P:98 I:150 C: 666691 Min:      6 Act:   13 Avg:    9 Max:      57