Firewire audio consumes lots of CPU

I have an external Edirol FA-66 firewire audio capture device. Plugging it in and switching it on sends kernel_task to 15-20% CPU usage immediately. That seems a bit excessive to me, can we expect the driver to be improved eventually?
I tried to use the Edirol device as a second stereo output with DJ-1800, but the high CPU usage (and probably some other bugs in the driver and in DJ-1800) led to lots of audio dropouts and made it unusable.
Lukas

I too have a similar problem except I think mine is flash related. It's fine when just surfing and watching news/videos but when I play a flash game the hard drive starts spinning constantly and it takes minutes to switch applications or shut the game down. This usually happens at the beginning of a flash game, settles down for a while, and after 45-60 minutes it starts up again but the hard drive keeps spinning for another 15-30 minutes then settles down again for an even shorter amount of time and then repeats the cycle. It started doing this to me in firefox 6, but I've since upgraded to 7.0.1 and flash is up to date. I've run all the malware/virus checks, tested the drive, but can not find anything wrong. If I manage to get the resource monitor running, firefox plugin container usually is reading my pagefile.sys at 40-50 million bytes/min, plus a few more firefox entries running in the low millions/min. I know flash is a memory pig but I have 2 gig memory plus the virtual memory which I tried a couple of custom settings and then set back to default, with no change in performance

Similar Messages

Apple Mail consuming lots of CPU

Since I've upgraded my MacBook Pro from Snow Leopard (10.6.8) to Mountain Lion Apple Mail has been behaving strangely – Activity Monitor shows Mail consuming about 100% CPU for hours at a time. Mail is often very sluggish at displaying messages. I've rebuilt my mailboxes (Mailbox > Rebuild) but that doesn't seem to help.
Is anybody else experiencing this? Any ideas about how to troubleshoot/fix it?

Please follow these instructions to delete the Mail "sandbox" folder.
Back up all data.
Triple-click the line below to select it, then copy it to the Clipboard (command-C):
~/Library/Containers/com.apple.mail
Quit Mail.
In the Finder, select
Go ▹ Go to Folder
from the menu bar. Paste (command-V) into the box that opens, then press return. A Finder window should open with a folder named "com.apple.mail" selected. If it does, move the selected folder — not just its contents — to the Desktop. Leave the Finder window open for now.
Relaunch Mail and test. If the problem is resolved, you'll have to recreate some of your Mail settings. You can then delete the folder you moved and close the Finder window. If you still have the problem, quit Mail again and put the folder back where it was, overwriting the one that may have been created in its place. Post your results.
Caution: If you change any of the contents of the sandbox, but leave the folder itself in place, Mail may crash or not launch at all. Deleting the whole sandbox will cause it to be rebuilt automatically.

SQL Data Modeler on MAC consumes lots of CPU but still hangs

Running data modeler version 3.1. on mac 10.7.3 - 64 bit both. Mac has got core i7 processor with 8Gigs or RAM, so no shortage of resources here.
Got mail open as well as normal SQL Developer exploring the database tables and running queries. So plenty resources still available.
I 'm experiencing intermittent conditions where I'm editing a card or entity properties and then developer goes into a "go very very very slow strike" mode. It consumes 99% CPU with average 40 threads running and approx 400 megs of memory consumed.
It then takes for ages to respond to any inputs on the commit/cancel/apply buttons - more than 10 minutes! I once tried the "Force Quit" option - bad bad mistake. It lost all the task bar option - only had the "file" option on the task bar left!
Anybody experienced the same or with a solution to this ?
Andre

Thanks for the help Ivan & Philip - made the change to 4GB RAM in the conf file but that did not solve the problem.
Process
1. Open view properties
2. Click Test Query button - works fine
3. Click Query button to edit query. Query builder never opens - monitor shows 100+ % CPU. Have to do force quit to close.
Reverse - same thing
1. Edit query 1st - no problem
2. Test query - after db connection dialog - the test never execute. 100+% CPU again.
I can edit as many view queries as I want and it works fine.
or
I can Test as many queries as I want - no problem
When I try to do both on the SAME view - then I get trouble.
Seems like an issue in the view edit dialog (only on Mac - never had the issue on a PC)
FYI - I am on 64 bit Java.

SQL QUERTY WITH TEXT 'SAVEPOINT FM_1' consumes lot of CPU

WE ARE USING ORACLE DATABASE 10g Rel 1
and Oracle Application server 10g
WHEN WE check Top SQL the top most seql with Activity % and CPU % of
45% is a SQL Which has following query
'SAVEPOINT FM_1'
What is this ?
Chaand

Hi,
A savepoint is a point in a transaction when you set a "mark". Further ni the transation you can ROLLBACK TO a savepoint instead of rolling back to the transaction beginning. Look at this sample:
TEST> CREATE TABLE A
2 (
3 I NUMBER
4 );
Table created.
TEST> INSERT INTO A VALUES (1);
1 row created.
TEST> COMMIT;
Commit complete.
TEST> -- here it's a new transaction.
TEST> INSERT INTO A VALUES (2);
1 row created.
TEST>-- here, i set a savepoint. Hence the table state is that it contains values (1,2).
TEST> SAVEPOINT S1;
Savepoint created.
TEST> -- I add a new value which is in a diferent "transaction step/environment"
TEST> INSERT INTO A VALUES (3);
1 row created.
TEST> -- And I get the 3 values as expected.
TEST> SELECT * FROM A;
         I
         1
         2
         3
TEST> -- Then when I rollback to the savepoint
TEST> ROLLBACK TO S1;
Rollback complete.
TEST> -- And then commit
TEST> COMMIT;
Commit complete.
TEST> -- The transaction part beween S1 and the ROLLBACK TO has "never existed"
TEST> -- And as I have commited, the transaction part beween the begin of the transaction (first commit)
TEST> -- and the savepoint is commited.
TEST> -- Which we can see by:
TEST> SELECT * FROM A;
         I
         1
         2HTH,
Yoann.

Dwm.exe starts consuming lots of CPU when machine is idle

Since doing a fresh install of Windows 8 Pro RTM x64 English on my Sony Vaio Z21 laptop, I've been bothered by a sudden increase in fan noise whenever I leave the machine idle for a while and the displays are turned off. Finally decided to try and get to
the bottom of it today, so I ran the Performance Recorder with the CPU usage profile enabled and brought up the relevant graphs in Performance Analyzer. See the below screen shot for the results.
I started the trace and then left the machine alone for a while to trigger the idle behavior. It's pretty clear that Dwm.exe is the main culprit. As to why this process would find anything useful to do when all the displays are turned off is beyond me. Also
Outlook.exe sees a significant increase of CPU usage during the same time period. Whether these two are somehow related, I have no clue. Please note that I've disabled all other processes in the graph for clarity; no other processes showed any visible increase
during the trace.
Any advice would be greatly appreciated!
Daniel Stolt, Perceptible, http://www.perceptible.net

I'm seeing similar characteristics as some others in this thread:
- The issue occurs when the system is idle AND the power management puts my displays on standby.
- Modifying my power management settings so that the display is NEVER put on standby causes the issue to go away. (The system will not show unusual CPU activity even after sitting idle for some time.)
- When the issue occurs, dwm.exe shows some CPU activity. dwm.exe's activity averages around 25%. Several other applications show CPU activity as well. Each individual application's activity averages less than 25% (so dwm.exe's activity
is the most visible during this issue), but the total CPU activity adds up to around 60-75%. The unusual CPU activity ceases when the monitor wakes up from standby.
Do others participating in this thread observe that the issue goes away if they modify their power management settings so that their monitor is never allowed to go to standby? I understand that this isn't a viable "solution" for most people,
but I'd like to know if everyone else shares that same observation.
I have a question (and appreciation!) for the persons genuinely contributing to this thread: Do you see any unusual CPU activity occur in any other applications when this issue occurs? For example, do you see a small amount of activity in explorer.exe?
I ask this because I've watched the CPU graphs for several individual processes which happen to be running on my system. (I've been leaving several process property windows open in Process Explorer to monitor individual process performance. It's
a kludgy method but it works.) Processes such as skype.exe, steam.exe, procmon.exe (Process Monitor), and taskmgr.exe each nibble at the CPU when the problem occurs. The effect is subtle but noticeable. The CPU nibbling for these applications
disappears when the monitor wakes-up from standby.
I've also noticed that there is slightly less overall CPU consumption if all application windows are minimized when the issue occurs. In the case of steam.exe, the unusual CPU consumption all but disappears when it is minimized.
I believe Harri Kaimio's post has been the closest thing I've seen posted to a technical explanation for the issue. It seems (?) that certain applications are attempting to draw something, but they are somehow blocked or otherwise unable to do so when
the monitor is on standby. dwm.exe plays a part in drawing, so it shows activity when this occurs. However, instead of giving up, the applications seem to go nuts and attempt the (same?) thing frequently, thereby generating CPU activity.*
*Please understand that these are guesses -- if someone can correct me with more technical details or procedures which would help disprove my guesses, please do show me where these guesses are wrong! I'd love to work towards a solid explanation.
A few more tidbits:
- I do not run Logitech's SetPoint.exe.
- I'm experiencing this on a desktop system. My display adapters are: AMD/Radeon HD 7800 series, and the integrated Intel HD Graphics 4000.
- Running Windows 7.
- I am incredibly pleased that not a single person has suggested "defragmenting" in this entire thread. :)

Firfox consumes lots of CPU. Hard drive is always spinning and clicking w firefox. RUNS SLOW.

Firefox is pretty much unusable early in a session. Gets better aftyer a while,say 10 minutes.

I too have a similar problem except I think mine is flash related. It's fine when just surfing and watching news/videos but when I play a flash game the hard drive starts spinning constantly and it takes minutes to switch applications or shut the game down. This usually happens at the beginning of a flash game, settles down for a while, and after 45-60 minutes it starts up again but the hard drive keeps spinning for another 15-30 minutes then settles down again for an even shorter amount of time and then repeats the cycle. It started doing this to me in firefox 6, but I've since upgraded to 7.0.1 and flash is up to date. I've run all the malware/virus checks, tested the drive, but can not find anything wrong. If I manage to get the resource monitor running, firefox plugin container usually is reading my pagefile.sys at 40-50 million bytes/min, plus a few more firefox entries running in the low millions/min. I know flash is a memory pig but I have 2 gig memory plus the virtual memory which I tried a couple of custom settings and then set back to default, with no change in performance

Jlaunch consumes lot of resources after upgrade

hi,
After upgrading our XI system from NW700 SP15 to EHP1 701 SP5 we find that the Jlauch is constantly using around 60% of the CPU and degrades the system performance. Has anyone experience this before?
This is print from the Thread Dump Taken.
"JCO.ServerThread-71" prio=5 tid=0x000000010282e750 nid=0x120 in Object.wait() [0xfffffffe11bff000..0xfffffffe11bff8b0]
        at java.lang.Object.wait(Native Method)
        - waiting on <0xfffffffea652ee18> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at java.lang.Object.wait(Object.java:429)
        at com.sap.mw.jco.RequestListenerGroup$RequestQueue.getRequest(RequestListenerGroup.java:719)
        - locked <0xfffffffea652ee18> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at com.sap.mw.jco.JCO$Server.loop(JCO.java:8240)
        - locked <0xfffffffea652ee18> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at com.sap.mw.jco.JCO$Server.run(JCO.java:8166)
        at java.lang.Thread.run(Thread.java:534)
"JCO.ServerThread-73" prio=5 tid=0x00000001039e1420 nid=0x11f in Object.wait() [0xfffffffe123ff000..0xfffffffe123ff8b0]
        at java.lang.Object.wait(Native Method)
        - waiting on <0xfffffffea7404a40> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at java.lang.Object.wait(Object.java:429)
        at com.sap.mw.jco.RequestListenerGroup$RequestQueue.getRequest(RequestListenerGroup.java:719)
        - locked <0xfffffffea7404a40> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at com.sap.mw.jco.JCO$Server.loop(JCO.java:8240)
        - locked <0xfffffffea7404a40> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at com.sap.mw.jco.JCO$Server.run(JCO.java:8166)
        at java.lang.Thread.run(Thread.java:534)
"JCO.ServerThread-72" prio=5 tid=0x0000000103b2d540 nid=0x11e in Object.wait() [0xfffffffe12bff000..0xfffffffe12bff8b0]
        at java.lang.Object.wait(Native Method)
        - waiting on <0xfffffffea741ec40> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at java.lang.Object.wait(Object.java:429)
        at com.sap.mw.jco.RequestListenerGroup$RequestQueue.getRequest(RequestListenerGroup.java:719)
        - locked <0xfffffffea741ec40> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at com.sap.mw.jco.JCO$Server.loop(JCO.java:8240)
        - locked <0xfffffffea741ec40> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at com.sap.mw.jco.JCO$Server.run(JCO.java:8166)
        at java.lang.Thread.run(Thread.java:534)
"JCO.ServerThread-70" prio=5 tid=0x0000000103b74220 nid=0x11d in Object.wait() [0xfffffffe133ff000..0xfffffffe133ff8b0]
        at java.lang.Object.wait(Native Method)
        - waiting on <0xfffffffea7404a40> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at java.lang.Object.wait(Object.java:429)
        at com.sap.mw.jco.RequestListenerGroup$RequestQueue.getRequest(RequestListenerGroup.java:719)
        - locked <0xfffffffea7404a40> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at com.sap.mw.jco.JCO$Server.loop(JCO.java:8240)
        - locked <0xfffffffea7404a40> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at com.sap.mw.jco.JCO$Server.run(JCO.java:8166)
        at java.lang.Thread.run(Thread.java:534)
"JCO.ServerThread-69" prio=5 tid=0x0000000102e28c60 nid=0x11c in Object.wait() [0xfffffffe13bff000..0xfffffffe13bff8b0]
        at java.lang.Object.wait(Native Method)
        - waiting on <0xfffffffea741ec40> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at java.lang.Object.wait(Object.java:429)
        at com.sap.mw.jco.RequestListenerGroup$RequestQueue.getRequest(RequestListenerGroup.java:719)
        - locked <0xfffffffea741ec40> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at com.sap.mw.jco.JCO$Server.loop(JCO.java:8240)
        - locked <0xfffffffea741ec40> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at com.sap.mw.jco.JCO$Server.run(JCO.java:8166)
        at java.lang.Thread.run(Thread.java:534)
"JCO.ServerThread-65" prio=5 tid=0x0000000102daed70 nid=0x11b in Object.wait() [0xfffffffe143ff000..0xfffffffe143ff8b0]
        at java.lang.Object.wait(Native Method)
        - waiting on <0xfffffffea652ee18> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at java.lang.Object.wait(Object.java:429)
        at com.sap.mw.jco.RequestListenerGroup$RequestQueue.getRequest(RequestListenerGroup.java:719)
        - locked <0xfffffffea652ee18> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at com.sap.mw.jco.JCO$Server.loop(JCO.java:8240)
        - locked <0xfffffffea652ee18> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at com.sap.mw.jco.JCO$Server.run(JCO.java:8166)
        at java.lang.Thread.run(Thread.java:534)
"JCO.ServerThread-68" prio=5 tid=0x0000000102d00ae0 nid=0x11a in Object.wait() [0xfffffffe14bff000..0xfffffffe14bff8b0]
        at java.lang.Object.wait(Native Method)
        - waiting on <0xfffffffea7404a40> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at java.lang.Object.wait(Object.java:429)
        at com.sap.mw.jco.RequestListenerGroup$RequestQueue.getRequest(RequestListenerGroup.java:719)
        - locked <0xfffffffea7404a40> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at com.sap.mw.jco.JCO$Server.loop(JCO.java:8240)
        - locked <0xfffffffea7404a40> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at com.sap.mw.jco.JCO$Server.run(JCO.java:8166)
        at java.lang.Thread.run(Thread.java:534)
"JCO.ServerThread-67" prio=5 tid=0x0000000104469de0 nid=0x119 in Object.wait() [0xfffffffe153ff000..0xfffffffe153ff8b0]
        at java.lang.Object.wait(Native Method)
        - waiting on <0xfffffffea7408da0> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at java.lang.Object.wait(Object.java:429)
        at com.sap.mw.jco.RequestListenerGroup$RequestQueue.getRequest(RequestListenerGroup.java:719)
        - locked <0xfffffffea7408da0> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at com.sap.mw.jco.JCO$Server.loop(JCO.java:8240)
        - locked <0xfffffffea7408da0> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at com.sap.mw.jco.JCO$Server.run(JCO.java:8166)
        at java.lang.Thread.run(Thread.java:534)
"JCO.ServerThread-66" prio=5 tid=0x00000001027ff050 nid=0x118 in Object.wait() [0xfffffffe15bff000..0xfffffffe15bff8b0]
        at java.lang.Object.wait(Native Method)
        - waiting on <0xfffffffea741ec40> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at java.lang.Object.wait(Object.java:429)
        at com.sap.mw.jco.RequestListenerGroup$RequestQueue.getRequest(RequestListenerGroup.java:719)
        - locked <0xfffffffea741ec40> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at com.sap.mw.jco.JCO$Server.loop(JCO.java:8240)
        - locked <0xfffffffea741ec40> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at com.sap.mw.jco.JCO$Server.run(JCO.java:8166)
        at java.lang.Thread.run(Thread.java:534)
"JCO.ServerThread-64" prio=5 tid=0x0000000102954570 nid=0x117 in Object.wait() [0xfffffffe163ff000..0xfffffffe163ff8b0]
        at java.lang.Object.wait(Native Method)
        - waiting on <0xfffffffea7404a40> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at java.lang.Object.wait(Object.java:429)
        at com.sap.mw.jco.RequestListenerGroup$RequestQueue.getRequest(RequestListenerGroup.java:719)
        - locked <0xfffffffea7404a40> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at com.sap.mw.jco.JCO$Server.loop(JCO.java:8240)
        - locked <0xfffffffea7404a40> (a com.sap.mw.jco.RequestListenerGroup$RequestQueue)
        at com.sap.mw.jco.JCO$Server.run(JCO.java:8166)
        at java.lang.Thread.run(Thread.java:534)
Thank you
Jonu Joy

I have seen cases where JSPM consumes lot of CPU resource . Do you have any JSPM session open . IF yes try closing it.
Thanks,
Gerard

T420s: Conexant Audio Message Service consumes a lot of CPU time in Windows 8

Hi,
I have here two models of T420s running Windows 7 and Windows 8.
The Windows 7 model is quiet and the Service Needs no cpu time during idle.
The Windows 8 model is noisy (the fan is Spinning) and the Conexant Audio Message Service (Version 1.6.0.0) is consuming 30% of cpu during idle.
Any suggestions?
Solved!
Go to Solution.

Pretty sure you can just disable the service. I did on my W520 with no ill effects.
W520: i7-2720QM, Q2000M at 1080/688/1376, 21GB RAM, 500GB + 750GB HDD, FHD screen
X61T: L7500, 3GB RAM, 500GB HDD, XGA screen, Ultrabase
Y3P: 5Y70, 8GB RAM, 256GB SSD, QHD+ screen

EA1 - consumes a lot of CPU

New 2.1.0.62 EA1 consumes a lot of CPU on my Macbook with MacOS 10.6.1.
After I have opened two database connections (Oracle) everything seems to be fine (CPU usage 2% and below), but after I have executed some sql statements I will never get below 7% of CPU usage. It gets even worse the longer you work with SQL Developer (> 25 %).
The statements I have executed did not have many rows (< 100) and do not take long (< 1 s).
Regards,
Sven

Hi Barry,
sorry haven't seen that you have edited this thread. Yes, for me it is still the case. I just updated to 2.1 final release and am testing. I am using SQL developer for 40 minutes now and it is consuming 24-25% of the CPU(s). ... after 2 hours of work it is at 35-36%.
Is there any tool that I can use to track this issue down or any information that I can send you? The suggested "topthreads" does not work here :-(
Regards,
Sven
Edited by: The terrible Sven on Dec 17, 2009 4:47 PM

FireWire Audio Heat Problem (Macbook Pro, Late 2008) VIDEO proof

http://www.youtube.com/watch?v=JYHnX3CGUoo
After a lot of hours of trying to figure out WHY my macbook pro heats up (a lot) when i connect my newly bought Apogee Duet firewire audio interface, i found out that actually what was happening is that there are CPU spikes of extremely short period (so short that Activity Monitor and iStat could not catch) constantly spiking the CPU frequency from 1596Mhz (Idle) to 2572Mhz (Maximum). Apart from the frequency spike there is also a VOLTAGE spike from 1.0v to 1.15.
I know that this is normal due to speedstep technologies and such BUT the rapid spiking and alterations of frequency and voltage ALWAYS happening when i have my Firewire audio plugged is not normal to me. There is nothing else running, everything's idle and i only plug the firewire interface.
Also this is not happening when i restrict OSX from loading AppleFWAudio.kext (either by deleting, moving, renaming it). I connect the firewire audio interface, the leds are illuminating but no heat problem (thats to show you that is not because the interface is self-powered)
Whats going on seems to be similar with the problems occurred after Mac Pro Audio Update to users that was using FW audio devices. They were hearing a sine noise coming from their macpro and propably that was because the same thing was happening. Constant spikes of voltage to the CPU. I dont have a macpro thought so i cant apply the update Apple released for that issue.
Also, my macbook is using Lucent / Agere (LSI) firewire chipset (the particular and known revision 6) but i dont think that this is the cause since Apogee didnt have any problems with the chipset
Info: The app im using to monitor the Frequency and Voltage is CoolBook, can be found here: http://www.coolbook.se/CoolBook.html

Firewire Audio disconnected / or AppleFWAudio.kext unloaded = Idle temp arround 50 celcius (iStat)
Firewire Audio Connected with AppleFWAudio.kext loaded = Idle temp arround 60 celcius (iStat)
If theres a possibility that this is due to bus powered firewire device (cause i have an external FW hard drive that is self-powered and temps are not rising when i connect it) then AppleFWAudio.kext maybe manages something with bus powered firewire.
Maybe when i have the interface connected but the kext not loaded the mA sucked by the interface are too little for causing a temp rise but by the time the kext is loaded and the interface is converting audio the mA required tops up so the temp rise comes from the mA load on the firewire bus and not the cpu itself.
*Even if that's the case, the rapid spikes of throttling on the cpu by the time the Firewire Audio interface is connected bothers me. This isn't something that should normaly happen on an idling machine.*

High pitch squeal related to Firewire audio device after 10.6.2 audio patch

So the recent Mac Pro audio update 1.0 (applied on 10.6.2) has reduced my CPU temperature with audio playback (Presonus Firebox Firewire audio interface) and that is great. Also haven't had any machine crashes (grey screens) recently which is also great.
The problem is that when the Firebox is plugged into the firewire port of the Mac Pro there is a constant high pitched whistle of slightly oscillating frequency. If I unplug the Firebox the whistle goes away in a few seconds.
After prolonged use in a quiet room (the kind of room you need for audio recording / mixing work!) the noise is enough to drive me crazy.
I read a post on another forum with other people having the same problem. Can anyone comment here on seeing the same thing? Is there any known work around or fix for this?
When the CPU is under heavy load (e.g. H.264 compression etc.) the noise subsides only to return when there is normal load (i.e. half a dozen apps running).
Help!
Thanks

So I was able to back out the update using "Kext Helper b7" and the original IOPlatformPluginFamily.kext and AppleHDA.kext files from a backup before applying the update. It's pretty easy - just drop the two files onto Kext Helper, hit "go" and then reboot.
My ears are no longer in constant pain and I can actually use the Mac Pro again albeit running quite hotter than before.
This is not a fix Apple. The problem looks unrelated to a specific device based on the posts in this thread. Please issue a usable fix for the Mac Pro Audio performance issue.

Ichat consumes over 100% CPU in video chat mode.

Hi,
I just updated my MBP (mid 2009) with new Snow Leopard. Ever since then, some of applications hangs, especially ichat, Mail, iphoto, safari.
Is it normal that iChat consumes over 100% CPU in video chat mode? Does everyone have the same problem?

Hello all. Ralph, I really appreciate all of your help on these iChat threads. I too am having the same issues with CPU overload on both of my Macbook Pro 2.16 GHz machines. I believe I may have traced the problem to older, non-Core 2 Duo chip computers such as mine. I have an iChat crazy family - lots of us spread across the country. The ones who have newer machines with a Core 2 Duo do not have this problem. They have super crisp, normal CPU usage (never exceeding 80%) chats. Sadly, this is not the case when I try with either of my Macbook Pro's running the older chips.
To clarify, I have also taken all of the steps mentioned here and in other threads to try to address the problem. I have reinstalled Snow Leopard, adjusted the maximum bandwith to as low as 200 kbps, tested my download, upload speeds, etc. Nothing seems to work. Ichat it essentially useless. I wish I had an answer for this issue. I assume Apple will address this in the next OS update.

USB Vs FIREWIRE AUDIO INTERFACES?

what is the advantage of having a firewire audio interface over a usb audio interface?
I have a Edirol UA-25 USB Audio interface and am going to be using it with my new macbook pro that i have just ordered!
I just want to know if this interface would work fine with logic on a macbook pro? or would it reduce performance coz its USB and not Firewire? and buy how much? whats the difference?
Thanks for your help
John

Basically, USB won't allow you to go with buffer settings as low as Firewire. That means you will have more latency with USB than with FW. Some drivers are more CPU intensive than others but I can't say this is a USB thing only. The first Yamaha MLAN drivers were terrible even if MLAN uses FW. I don't think USB or FW have an impact on tracks count.
Sorry for the double post.
Message was edited by: mlehmann

Kernal_Task consumes 300% of CPU + Fan runs at high speed

Hi all,
I am currently using MacBook Pro 13-inch, Mid 2012.
Since last few weeks this mac has been so slow and the fan began runing at very high speed wich makes noise so loudly.
I then went to a so called "Genius Bar" at the apple retailing store. They did "the neccessary test", they told me so. "There is no any significant problem with your mac, both softwear and hardwear", they replied to my question why my mac became so slow and noisy.
After the dianostic test, they reseted PVRAM, PRAM and SCM... They told me the problems were resolved.
I brought my mac back home.
Oh my Buddha, the problem was still here. By tomorrow morning, I went back again to the store. A "genius man" told me to backup all my data as he needed to reset my system to a new version Mavericks OS X 10.9.1. After reinstallation the new version, we did a test there. Unfortunatly, the result was negative.
They seemed curious with my mac's problems. They suggested me to change MLB, 2.5Ghz, Fan, Front Hard Drive Bracket W/IR/Sleep/HD Cable.
..... Two days after the same story re-appared. I went to the store again. This time they suggested me to change the Topcase, W/Keyboard, No Trackpad,13" MBP-CAN. I paid for that.
It's very anoying. They changed almost everything. I wasted a lot of money and times. The last day I went to the "Genius Bar", the manager told me that they can detect or identify the problem. "What we can do for you is to refund you!", he told me. I really don't like this phrase much as what I wanted was that my Mac should be repaired.
So, my question is that how do we can troubleshoot the Kernal_Task? It consume 300% of CPU. The fan sound loudly even before entering my password to operate the system. I mean just by clicking the power button you can already hear the loud sound. And now I continue working with "MacBook Pro. with Tractor Sound".
Anyone can help?
Thanks

Sokly H.,
what did the manager’s offer of a refund cover — the money that you’ve paid for this series of repairs, or the purchase price of your MacBook Pro, or both?

Firewire , Audio & Offset Issues = has apple resolved them ?

I've read a lot about the firewire offset issues on firewire audio devices using the built in OSX drivers.
Has apple resolved this yet?
Is USB safe to use?

I tried the firepod and could not use even a buffer of 64 at times.
Then I tried a usb toneport and got a buffer of 32 with heavy track and plug in content while playing guitar through amplitube with software monitoring on.

Firewire audio consumes lots of CPU

Similar Messages

Maybe you are looking for