Question on the Solaris Translation Storage Buffer (TSB)

Hi all --
I'm new to Solaris and am trying to understand how kernel handles TLB misses. From reading the manuals, I gather that instruction and data TLB misses cause an interrupt to the OS. Thereafter, the miss handler uses the MMU Tag Register and TSB pointer register to search for the required translation table entry in the TSB.
I'm wondering how TSB accesses are monitored for multithreaded programs running on multicore machines. Suppose that in a 2-core system, a parallel program's workload is split into two threads, each executing on one of cores. If both cores experience TLB misses around the same time, can they access the TSB simultaneously? Or is the TSB locked by whichever core misses first, serializing lookup?
Thanks in advance!
Abhishek

Based on my knowledge of UltraSparc 2007 architecture, TLB misses can be handled by hardware table walker, and not cause a trap to OS. If TSB can not map the virt address to phy one, trap will be caused to OS software handler.
Each core has a set MMU unit to deal with the addressing translation,

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BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
PL/SQL Release 11.2.0.1.0 - Production
CORE    11.2.0.1.0 Production
TNS for Linux: Version 11.2.0.1.0 - Production
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:SAVED_SQL_ID
9babjv8yq8ru3
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thanks in advance,
Regards,
Dariyoosh

>
and also v$session page, yet I didn't find anything indicating that SERVEROUTPUT should be switched off whenever views such as v$sql, v$session
are queired. I don't really understand the link in terms of impact that one can have on the other or better to say rather, why there is an impact
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Can I buy additional Creative Cloud storage?
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2.23 Apps must follow the iOS Data Storage Guidelines or they will be rejected

My Multi Issue v14 App (24124) was just rejected by Apple. Apparently because storage of the data (folios?) was not iCloud compatible.
Is this related to v14? Would building a v15 app resolve the issue?
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Full text of Apple rejection below...
Nov 4, 2011 08:17 PM. From Apple.
2.23
We found that your app does not follow the iOS Data Storage Guidelines, which is not in compliance with the App Store Review Guidelines.
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Temporary files used by your app should only be stored in the /tmp directory; please remember to delete the files stored in this location when the user exits the app.
It would be appropriate to revise your app so that you store data as specified in the iOS Data Storage Guidelines.
For discrete code-level questions, you may wish to consult with Apple Developer Technical Support. Please be sure to include any symbolicated crash logs, screenshots, or steps to reproduce the issues when you submit your request. For information on how to symbolicate and read a crash log, please see Tech Note TN2151 Understanding and Analyzing iPhone OS Application Crash Reports.
To appeal this review, please submit a request to the App Review Board.

You might want to check out our ANE (Adobe Native Extension) solution that enables your FB projects to abide by the Apple's Data Storage guidelines.
https://developer.apple.com/library/ios/#qa/qa1719/_index.html
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http://www.jampot.ie/ane/ane-ios-data-storage-set-donotbackup-attribute-for-ios5-native-ex tension/
David
JamPot.ie

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Errr... Nevermind. I think I found a better way to use the external drive without the use of the router. Thanks anyway.
~JRK 2014
"Your bark is only as good as your bite. BITE HARD!" ~JRK 2004

Is the "512GB PCIe-based Flash Storage" on the new mac worth the extra cost? I am comparing with a refurb with better specs (faster CPU, larger hard drive) and from what I undersand the PCIe flash storage is the big differentiator in cost.

hello - i am considering two macbook pros
NEW - http://store.apple.com/us/buy-mac/macbook-pro?product=ME294LL/A&step=config#
REFURB - http://store.apple.com/us/product/G0ML1LL/A/refurbished-macbook-pro-27ghz-quad-c ore-intel-i7-with-retina-display
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Is the PCIe flash storage really worth the extra cost (and smaller size)?
PS - Also I believe the brand new one has 2 GB graphics memory as opposed to 1 GB graphics memory. I don't really care about that as much as I won't be doing a lot of video editing or gaming.

RestonManJavaLuver wrote:
Is she wrong - are these actually going to people's homes, being used, then returned and resold?
Some are some are not. Otherwise Apple has a ton of Mac's sitting around that have been returned by customers under their 14 day No Questions Asked return policy.
But they not just Returned and Resold. They go back to Apple, checked out (Tested) any parts that are not up to spec replaced and then repackaged in a plain white box to be sold as refurbs.

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Thank you

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Hi All
I'm studying RAC and I'm concerned about RAC's I/O performance bottleneck.
If I have 10 nodes and they use the same storage disk to hold database, then
they will do I/Os to the disk simultaneously.
Maybe we got more latency ...
Will that be a performance problem?
How does RAC solve this kind of problem?
Thanks.

J.Laurence wrote:
I see FC can solve the problem with bandwidth(throughput),There are a couple of layers in the I/O subsystem for RAC.
There is CacheFusion as already mentioned. Why read a data block from disk when another node has it in is buffer cache and can provide that instead (over the Interconnect communication layer).
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Traditionally, you pop a HBA card into the server that provides you with 2 fibre channel pipes to the storage switch. These usually run at 2Gb/s and the I/O driver can load balance and fail over. So it in theory can scale to 4Gb/s and provide redundancy should one one fail.
Exadata and more "+modern+" RAC systems use HCA cards running Infiniband (IB). This provides scalability of up to 40Gb/s. Also dual port, which means that you have 2 cables running into the storage switch.
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Port to port latency for a properly configured IB layer running QDR (4 speed) can be lower than 70ns.
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Exadata takes it even further as special ASM software on the storage node reconstructs data blocks on the fly to supply the RAC instance with only relevant data. This reduces the data volume to push from the storage node to the database node.
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Clearly, the colon translation CAN work. It is MEANT to work. No one can dispute that. The user is NOT supposed to be messed over with 'Untitled.PDF' files. They are MEANT to have actual PDF file titles, as seen in our example above.
Therefore the question:
Is there any solution to the colon translation bug?
It is incredibly annoying.

My guess is they don't care. Most likely they're illiterate and don't know what a colon is for. They probably think it's a little-used character. Remember: these are the people who don't know the difference between "deprecate" and "depreciate".
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Hello all.
I am new hear and would like to ask a question regarding to the Solaris Crash Analysis Tool.
We are analyzing the results of "thread summary" but not quite sure what the asterisk represents.
Following are the items that asterisk were attached.
50* threads sleeping on a semaphore (49 user, 1 kernel)
49* threads in biowait() (49 user, 0 kernel)
1* process with 19 pending and 0 done kaio
3* interrupt threads running (0 user, 3 kernel)
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what does the asterisk mean.
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In addition, is the value
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Yu

Does the Solaris 10 installer Fdisk preserve 'unknown' partitions?

Hi there,
I am trying to install Solaris 10 - I have a CD to boot from, but can't tell exactly which release it is - sometime in 2008 I think...
In any case, I am attempting install on my LG laptop along-side an XP installation.
I've been searching for hours and nowhere can I find an answer to the simple question above.
I just want to be sure I am not going to kill my XP install by clobbering it with fdisk.
The installer screen I am talking about looks just like the one you find here:
http://www.blastwave.org/docs/step-059.html
My execution of the installer reveals 2 existing partitions (my XP partition and a little one - size 205Mb which I think contains some laptoppy stuff). Both are labelled 'unknown'.
I left about 30Gb free when I installed XP so I could setup a dual boot with Solaris. The third box in the fdisk installer screen is this empty partition, and is conveniently labelled with 'Solaris' by the installer. The last (4th) partition is labelled as 'unused' and has 0 bytes allocated. I intend to steal a few Mb from the 'Solaris' partition and create a FAT32 partition here...as this seems to be the recommended approach...
Anyhow, if anyone out there can help me out I'd be really appreciative - I think the answer is probably yes, it will preserve them, but I'd like to be certain as I don't want to have to reinstall XP.
Thx in advance.

Hi Paul,
thanks for your response. Windows install disk gives partitioning options - don't think it comes with a fdisk util on its own (as an OS that is) though. I had already left part of the disk unpartitioned when I used the fdisk for the windows install, so I could install Solaris...
In the end I decided to be brave and click next - the answer is that Yes it does preserve them - at least it did in my case. I now have a dual boot system. You can have the points for taking the time to bother with my silly question.
:-D
Have a few other issues to resolve with it now - but at least it's up and running, and I managed to get network connectivity - just not thru my wireless yet - hopefully I'll be able to.
Much fun for me to have - cheers!

Question on the Solaris Translation Storage Buffer (TSB)

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