Running OpenSolaris 2008.05 w/ the latest x86 OSS sound drivers gives me high interrupts and CPU usage when "idle" of about 21%. <br><br> Using the cool <a href="http://opensolaris.org/os/project/tesla/Work/Powertop/";>PowerTOP from Project Tesla</a>, I can see one of my dual 3.0 Ghz CPU cores are running at maximum CPU frequency and not throttling down into any power saving mode (pm is configured), and even at 3.0 Ghz, is hitting over 20% CPU utilization (of that core) processing interrupts. <br><br>
Audio hardware: Intel 82801H (ICH8 family) HD Audio Controller<br> <br><br> =======================================================<br> <br> Solaris PowerTOP version 1.0 (c) 2007 Intel Corporation<br> <br> Cn Avg residency P-states (frequencies)<br> C0 (cpu running) (56.6%) 2400 Mhz 0.0%<br> C1 0.1% (43.2%) 3000 Mhz 100.0%<br> <br> Wakeups-from-idle per second: 3407.1 interval: 8.0s<br> <br> Top cause for wakeups:<br> 88.3% (3000.2) <interrupt> : hdaudio#0<br> =======================================================<br><br> :~$ mpstat<br> CPU minf mjf xcal intr ithr csw icsw migr smtx srw syscl usr sys wt idl<br> 0 42 0 31 3641 3323 394 8 22 7 0 944 2 22 0 76<br> 1 38 0 18 94 32 524 17 22 9 0 1115 2 1 0 97<br> =======================================================<br><br> <br> Would anyone have any pointers to help reduce the audio interrupt and CPU load?<br><br> Of course, I'd really like to have audio, but I don't want it to cost me 20%+ CPU in the process, so if anyone can offer any resolutions short of disabling audio completely, I'd be grateful. <br><br> Thanks. <br><br><br><br> Wes W. -- This message posted from opensolaris.org
