Trying to better understand L2 cache

What would more L2 cache (in the higher end editions of the MacBook Pro) really get you? Are there certain situations or use cases that would benefit most from having more L2 cache?
Ryan

Short for Level 2 cache, cache memory that is external to the microprocessor. In general, L2 cache memory, also called the secondary cache, resides on a separate chip from the microprocessor chip. Although, more and more microprocessors are including L2 caches into their architectures.
Somewhat more will be found here and here.

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IP - Trying to better understand FOREACH IN REFDATA

Hi,
We would like to implement a copy function to copy actual data to plan (multi-provider). I know I'll need to use FOREACH IN REFDATA but I would like to better understand it.
If you use FOREACH IN REFDATA, will this loop over your reference data within each block of your plandata? For example if you have only two combinations in your plan data, will it then loop twice over the entire reference data (with the characteristics in the foreach in refdata loop)?
Will the FOREACH IN REFDATA also work even if you have no planning data at yet created?
=> we would like the budget process to start with a copy of actual data (to default data, but also to generate the most important combinations). We cannot use standard copy because there are some special items to be taken into account.
regards
D

D,
This is my understanding.Say you have chars X,Y,Z in the agg level.You are using a filter(package) consisting of only X and Y.The filter leads to the construction of the planning blocks along with the fields to be changed.
Now in my Formula function , if I want to access the values of the char Z , I would use the FOREACH REF data for accessing the Z values.So it will loop exactly as many times as the combination of values permit for Char Z in the aggregation level.
Not sure how you are using this construct in your special case.
Regs,
skaBPS

Forum / wiki... trying to better understand

So I have been around here almost a year and this is my first forum I have been consistently active on. There are some things I don't understand I would like to clear up.
1) forum titles (ranks?) admin moderator make sense but things like trusted user and forum fellow I am not fully grasping... i looked through the topics here and didnt see any titles that might explain this.
2) The wiki... I see here and there references from other members saying <create or update it> is this something any of us can do if we have a good reason to?
3) I would like to be able to chip in where I can here as I really like this distro but besides helping with the few questions I can, which isn't always my strong point is there any other things a member can do? The distro has been great to me as well as the community so I just am trying to find ways to pay it back in ways I am able to.
-- edited typo --
Last edited by VanillaFunk (2014-03-16 21:36:44)

VanillaFunk wrote:1) forum titles (ranks?) admin moderator make sense but things like trusted user and forum fellow I am not fully grasping...
See the Wiki about Trusted Users and, I believe (though I am not sure) that forum fellows are former BBS moderators/administrators that have "cashed in for their taco pensions".
2) The wiki... I see here and there references from other members saying <create or update it> is this something any of us can do if we have a good reason to?
Yes, just make a Wiki account; then update it. If your changes are problematic for some reason, they'll be reverted; and if you want to avoid that, you can discuss possible changes on the talk page before adding them.
3) I would like to be able to chip in where I can here as I really like this distro but besides helping with the few questions I can, which isn't always my strong point is there any other things a member can do? The distro has been great to me as well as the community so I just am trying to find ways to pay it back in ways I am able to.
See ArchWiki: Contributing and Getting Involved
All the best,
-HG

Just trying to better understand...

I manually back-up my iPad mini to my iTunes just so that I am able to physically and manually regulate what is on my iPad. I have selected three out of the seven of my movies to be on my iPad but I saw that there were all my movies on iPad but the ones I had not selected myself had a cloud symbol on it. I saw that in my settings "Show All Videos" was enabled. How am I able to watch the other movies? Are those store on iCloud? Will this cost me anything or will I be using any data or anything that is not directly stated?

Usually the cloud symbol indicates a movie TV or music that you previously downloaded and has been deleted from your iPad. You can download that item again at no extra charge. There is some streaming of music movies and TV so that you don't have to have it actually on your device.

Trying to better understand JNI...

I have read the documentation on JNI at:
http://java.sun.com/docs/books/tutorial/native1.1/TOC.html
A few questions arose when reading:
I created an applet that needs to call a DLL file. This DLL file sits on the server. When I write the code loadLibrary("myDll") does java search the server for the dll file or the user's machine for the dll file? I would assume it searches the server. If the file doesn't search the server. How, or Can you write the loadLibrary to search the server, can you set a path with an IP address?
Thanks for the help in advance,
-James
...Aw the power of knowledge

An applet is always executed locally or else it would be a SERLVET. So loadLibary will look for a local DLL. Since DLLs must be known to the OS you cant open DLLs on other locations, exception is maybe a network share.

Question to Better Understand Antennas in iPhone 4

Hello,
I've got an GSM iPhone 4 and I'm trying to better understand the external antenna layout.
This is the picture I've always seen of the antenna layout:
But I don't understand two things.
#1 Why does the signal only drop when you short out the GSM and other antenna at the bottom left and not at the top left?
#2 Is the GSM antenna actually the entire piece shown there? I was under the impression that to meet SAR regulations all new phones had the antennas built only into the bottom to get the radiation as far away from the person's head as possible.

Hello nattybangalore
Issues pertaining to making phone calls would not pertain to a virus of any sort. To troubleshoot the issue, follow the steps in the article below to get it sorted out.
iPhone: Troubleshooting issues making or receiving calls
http://support.apple.com/kb/TS3406
Regards,
-Norm G.

Need better understanding of password cache

This issue has also been submitted to iPlanet support.
In NSMS 4.15 p6, Solaris 2.6, two IMAP daemons, two mshttpd daemons:
I am trying to get a better understanding of password caching. See service.authcachettl and service.authcachesize in the NSMS tuning guide.
The guide says "The authentication cache ... is not shared between different processes". It also says "Its value should be greater than or equal to the number of users who have their mailbox on the machine to avoid pushing entries out of the cache before the TTLs expire."
Our user population is about 60% webmail, 40% IMAP. I turned logging for each of these to Debug level to see the password caching numbers. Here is a log entry for each of our four processes:
HTTP:
httpd[3568]: General Debug: Password cache: 7344 entries, 20635 hits, 57565 misses, 22651 collisions.
httpd[3564]: General Debug: Password cache: 7255 entries, 20573 hits, 57327 misses, 21798 collisions.
IMAP:
imapd[3515]: General Debug: Password cache: 4109 entries, 250843 hits, 73057 misses, 16132 collisions.
imapd[3522]: General Debug: Password cache: 4120 entries, 252521 hits, 93979 misses, 16582 collisions.
We have approximately 20,000 mailboxes so I set the cache size somewhat higher than that, but it appears that each daemon only needs around 5 to 10 thousand. Is that a setting for each process as is implied by the tuning guide? If so, why so they suggest setting it at the number of mailboxes? Does each process have to allocate memory for the auth cache at startup? Am I wasting memory?
Other questions I have:
What are collisions?
What are some possible explanations for such a poor hit to miss ratio in http?
From what time are these numbers? That is, is there any time at which they reset without restarting services?
Thanks.
Mark Evangelista
Georgetown University
Washington, DC, US

It took awhile, but I got a response from iPlanet support. Look for responses interspersed with my original question below:
Mark Evangelista wrote:
The guide says "The authentication cache ... is not shared between different processes". It also says "Its value should be greater than or equal to the number of users who have their mailbox on the machine to avoid pushing entries out of the cache before the TTLs expire."
Our user population is about 60% webmail, 40% IMAP. I turned logging for each of these to Debug level to see the password caching numbers. Here is a log entry for each of our four processes:
HTTP:
httpd[3568]: General Debug: Password cache: 7344 entries, 20635 hits, 57565 misses, 22651 collisions.
httpd[3564]: General Debug: Password cache: 7255 entries, 20573 hits, 57327 misses, 21798 collisions.
IMAP:
imapd[3515]: General Debug: Password cache: 4109 entries, 250843 hits, 73057 misses, 16132 collisions.
imapd[3522]: General Debug: Password cache: 4120 entries, 252521 hits, 93979 misses, 16582 collisions.
We have approximately 20,000 mailboxes so I set the cache size somewhat higher than that, but it appears that each daemon only needs around 5 to 10 thousand. Is that a setting for each process as is implied by the tuning guide?
A: It has been confirmed that the cache size setting is per daemon. In our case with two each of mshttpd and imapd, we have allocated memory of four times the cache
size setting.
If so, why so they suggest setting it at the number of mailboxes?
A: The cache size will have some impact on collisions. See the question on collisions below.
Does each process have to allocate memory for the auth cache at startup?
A: Yes
Am I wasting memory?
A: Possibly not. See collisions below.
What are collisions?
A: iPlanet says "Collisions are when multiple uids have the same hash value in the cache. They only becomes a problem when the number of entries becomes close to the
max cache size. Since you have 7344 entries, you might want to increase service.authcachesize from the 10000 default to, say, 20000."
Comment: I infer from this that there is some hashing scheme that is dependent on the size of the cache and that with a larger cache we should have fewer collisions.
What are some possible explanations for such a poor hit to miss ratio in http?
A: Not answered by iPlanet. This is my speculation only, but it is likely that the pattern of use of webmail vs imap. The bulk of our webmail users are students who are more likely to sporadically wander over to a computer lab and check their email via the web rather than head back to thier dorm room and their own workstation. The vast majority of imap users are staff and faculty who spend more time at their own workstations, sign on in the morning and have their client check for new mail every 15 minutes or so.
From what time are these numbers?
A: Numbers are from the start of the services.
That is, is there any time at which they reset without restarting services?
A: No.
Additionally iPlanet provided:
"Miss - Is when one of the following happens:
1. no match for a given entry,
2. there is a match but this cache entry is expired,
3. entry is too long to be cached"
There was no further explanation of reason #3, which I think just begs for another question

Hello congratulations for the work you have been developing. The iCREATE has helped me greatly improve my Mac and better understand some applications. Recently my iPhoto has given me problems and I do not realize what is happening. When I double click a p

Hello congratulations for the work you have been developing. The apple support has helped me greatly improve my Mac and better understand some applications. Recently my iPhoto has given me problems and I do not realize what is happening. When I double click a photo it does not appear ... or rather the background is black and only the zoom window appears. How to solve this? I've done a restoration of the library, but the problem remains. Thanks and good job.

There are several possible causes for the Black Screen issue
1. Permissions in the Library: Back Up and try rebuild the library: hold down the command and option (or alt) keys while launching iPhoto. Use the resulting dialogue to rebuild. Include the option to check and repair permissions.
2. Minor Database corruption: Back Up and try rebuild the library: hold down the command and option (or alt) keys while launching iPhoto. Use the resulting dialogue to rebuild.
3. A Damaged Photo: Select one of the affected photos in the iPhoto Window and right click on it. From the resulting menu select 'Show File (or 'Show Original File' if that's available). (On iPhoto 11 this option is under the File -> Reveal in Finder.) Will the file open in Preview? If not then the file is damaged. Time to restore from your back up.
4. A corrupted iPhoto Cache: Trash the com.apple.iPhoto folder from HD/Users/Your Name/Library/ Caches...
5. A corrupted preference file: Trash the com.apple.iPhoto.plist file from the HD/Users/ Your Name / library / preferences folder. (Remember you'll need to reset your User options afterwards. These include minor settings like the window colour and so on. Note: If you've moved your library you'll need to point iPhoto at it again.)
If none of these help:
As a Test:
Hold down the option (or alt) key key and launch iPhoto. From the resulting menu select 'Create Library'
Import a few pics into this new, blank library. Is the Problem repeated there?

When opening Bridge (CS6) I get the following message: "Bridge encountered a problem and is unable to read the cache. Please try purging the central cache in Cache Preferences to correct the situation" I tried and after selecting purge cache it does not a

When opening Bridge (CS6) I get the following message: "Bridge encountered a problem and is unable to read the cache. Please try purging the central cache in Cache Preferences to correct the situation" I tried and after selecting purge cache it does not allow me to select OK. Also Bridge keeps saying "Building Criteria" with the spinning wheel and nothing happens. I tried uninstalling and reinstalling to no avail. Please help:)

Maybe a Preferences reset can help:
Numerous program settings are stored in the Adobe Bridge preferences file, including display, Adobe Photo Downloader, performance, and file-handling options.
Restoring preferences returns settings to their defaults and can often correct unusual application behavior.
Press and hold the Ctrl key (Windows) or the Option key (Mac OS) while starting Adobe Bridge.
In the Reset Settings dialog box, select one or more of the following options:
Reset Preferences
Returns preferences to their factory defaults. Some labels and ratings may be lost. Adobe Bridge creates a new preferences file when it starts.
Purge Entire Thumbnail Cache
Purging the thumbnail cache can help if Adobe Bridge is not displaying thumbnails properly. Adobe Bridge re-creates the thumbnail cache when it starts.
Reset Standard Workspaces
Returns Adobe predefined workspaces to their factory default configurations.
Click OK, or click Cancel to open Adobe Bridge without resetting preferences.

I have an error when installing apps on my mac from the apple store. It says "return to the purchase page and try again"... I think it is something to do with the installation process itself. I have tried to clear apple store cache, restarted apple s

I have an error when installing apps on my mac from the apple store. It says "return to the purchase page and try again"... I think it is something to do with the installation process itself. I have tried to clear apple store cache, restarted apple store from debug menu, double checked my apple id account and etc..but doesn't work anyway.

I'm having the same problem and went as far as to delete and reinstall the AppStore and still no dice.

I m having issues with the phone which i made a recording but the customer care support in our place donot seem to be of much help. i have told them nuumerous times that for better understanding i have made a video of it but no response.. really disspoint

i m having issues with the phone which i made a recording but the customer care support in our place donot seem to be of much help.
i have told them nuumerous times that for better understanding i have made a video of it but no response..
really disspointed with your customer support.
i have uploaded them in google docs..links below.. t
he first one happened on 30th of april 2014 https://docs.google.com/file/d/0B6z0lUXVGPGrc0tXNnZFaDQ3WDg/edit
the second happened today. i called customer care but no satisfactory respose either. https://docs.google.com/file/d/0B6z0lUXVGPGrSldEeWQ3aGFhaDA/edit
who is going to help me out and atleast pay attention to what my problem is. apple seems to ignore my attempts to show them what is the problem... the dont even want to see the videos.. !! disgusting.
its still under warrenty. please help.

Take your iPhone to an Apple Store or authorized service center in the country where you purchased the iPhone and they will look at it and replace it under warranty if applicable.
If you cannot take it person contact them to determine how to send them your phone.
You can't expect them to replace your iPhone without first examining it.

I have an idea for an app and want to better understand the process... reputable developers, costs, margins on a .99 cent app etc. thanks

i have an idea for an app and want to better understand the process... reputable developers, costs, margins on a .99 cent app etc. thanks

All the reputable devs are busy and out of reach.
Apple takes 30% from the price, so you're left to figure profit after knowing how many you will sell/did sell.
Development costs can range from less than USD$10k to six figures or more.
You don't provide details on what category you plan on participating in, so it makes anything but dartboard guessing pretty difficult, sorry

Trying to move the Media Cache Folder

I have the current version of Premiere Pro CC on OSX 10.9.4. I want to move my media cache files and media cache database folder from the default, USERS/LIBRARY/APPLICATION SUPPORT/ADOBE/COMMON to my external media scratch drive. I have changed this in my settings, and I can see cache files building up in the new directory. However, somehow, new media cache files are still being put in the old cache files and database folders. It is as if some are going to the new, some are going to to old. Any reason fro this and any way to chance it? I want no caching to happen on my internal system drive, I want all to be external.
Just found something odd - I tried making a brand new media cache directory on my scratch drive after resetting the premiere pro prefs. Now, premiere is putting cache files in this new one, the previous one I created on my media drive, and on my system folder. Is this a bug?

Just curious, are you still having this issue?

MDB stops while trying to write to a Cache

Hi,
I have this MDB that listens to a JMS queue, and I want to write to a Tangosol (Coherence) cache from this MDB. But even when i just have
NamedCache cache = CacheFactory.getCache("xyz");
inside the MDB, I get an exception which looks like this :
2008-01-04 11:44:45.187 WARNING J2EE EJB-02014 [WebCenterMDBDeployer:WebCenterMDBDeployer:WebCenterMDBBean] All message consumer threads have terminated due to provider errors, stopping MDB.
oracle.classloader.util.AnnotatedNoClassDefFoundError:
     Missing class: com.tangosol.net.CacheFactory
     Dependent class: webcentermdbproject.WebCenterMDBBean
     Loader: WebCenterMDBDeployer.root:0.0.0
     Code-Source: /D:/Jdeveloper10.1.3.3/jdev/extensions/oracle.adfp.seededoc4j.10.1.3/j2ee/home/applications/WebCenterMDBDeployer/WebCenterMDBDeployer.jar
     Configuration: <ejb> in D:\Jdeveloper10.1.3.3\jdev\extensions\oracle.adfp.seededoc4j.10.1.3\j2ee\home\applications\WebCenterMDBDeployer
The missing class is available from the following locations:
     1. Code-Source: /D:/Jdeveloper10.1.3.3/jdev/extensions/oracle.adfp.seededoc4j.10.1.3/j2ee/home/applications/TestPortlets10/TestPortlets10/WEB-INF/lib/tangosol.jar (from manifest of /D:/Jdeveloper10.1.3.3/jdev/extensions/oracle.adfp.seededoc4j.10.1.3/j2ee/home/applications/TestPortlets10/TestPortlets10/WEB-INF/lib/coherence.jar)
     This code-source is available in loader TestPortlets10.web.TestPortlets10:0.0.0.
     2. Code-Source: /D:/Jdeveloper10.1.3.3/jdev/extensions/oracle.adfp.seededoc4j.10.1.3/j2ee/home/applications/TestPortlets/TestPortlets/WEB-INF/lib/tangosol.jar (from manifest of /D:/Jdeveloper10.1.3.3/jdev/extensions/oracle.adfp.seededoc4j.10.1.3/j2ee/home/applications/TestPortlets/TestPortlets/WEB-INF/lib/coherence.jar)
     This code-source is available in loader TestPortlets.web.TestPortlets:0.0.0.
     3. Code-Source: /D:/Jdeveloper10.1.3.3/jdev/extensions/oracle.adfp.seededoc4j.10.1.3/j2ee/home/applications/TangosolTest1/TangosolTest1/WEB-INF/lib/tangosol.jar (from manifest of /D:/Jdeveloper10.1.3.3/jdev/extensions/oracle.adfp.seededoc4j.10.1.3/j2ee/home/applications/TangosolTest1/TangosolTest1/WEB-INF/lib/coherence.jar)
     This code-source is available in loader TangosolTest1.web.TangosolTest1:0.0.0.
     4. Code-Source: /D:/Jdeveloper10.1.3.3/jdev/extensions/oracle.adfp.seededoc4j.10.1.3/j2ee/home/applications/TestPortlets14/TestPortlets14/WEB-INF/lib/tangosol.jar (from manifest of /D:/Jdeveloper10.1.3.3/jdev/extensions/oracle.adfp.seededoc4j.10.1.3/j2ee/home/applications/TestPortlets14/TestPortlets14/WEB-INF/lib/coherence.jar)
I am just trying to get the Cache, and still getting this exception.. Its the same when i try to put something to the cache..
Any idea what might be going wrong? After this, the MDB stops working altogether..
Thanks in advance
Pravin

Hi
I would recommend checking your system.log file for an error of this type. Probably just filter with SAM.
"timestamp" kernel SAM Multimedia: READ or WRITE failed, SENSE_KEY = 0x02, ASC = 0x04, ASCQ = 0x01
If you are seeing errors of this type, my guess is that you're having write communication errors when attempting to burn. I can't guarantee that these errors specifically indicate a hardware failure, but my experience has been when these errors are produced, an ODD drive or cable failure is causing a bus error due to input/output errors with the data.
If you go to Applications -> Utilities -> Console, you can bring up the system.log file. If the drive is bad, I hope you can find a replacement option.

Getting an error when trying to store database in cache directory

Hello,
"SQLError: 'Error #3125: Unable to open the database file.', details:'Connection closed.', operation:'open', detailID:'1001'"
this is my code :
sqlConn = new SQLConnection();
var str:String=File.applicationDirectory.nativePath;
var cacheDir= new File(str +"/\.\./Library/Caches");
var dbFile:File=cacheDir.resolvePath("DB.db");
sqlConn.open(dbFile);
sqlStat = new SQLStatement();
sqlStat.sqlConnection=sqlConn;
It works if I use var dbFile:File=File.applicationStorageDirectory.resolvePath("DB.db");

With AIR 3.6 latest prerelease, A new static property, File.cacheDirectory has been added, which points to the <APPLICATION_HOME>/Library/Caches directory on iOS devices, and files in this directory are not backed up. So, the above workaround is not required.
Another property, preventBackup is introduced in the File API, which when set prevents a file or a folder from getting backed up on the iCloud. This property works on iOS 5.1 devices and later.
You can find additional details on this feature here<http://labsdownload.adobe.com/pub/labs/flashruntimes/shared/air3-6_flashplayer11-6_release notes.pdf>

Trying to better understand L2 cache

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