Intel disables TSX after bug is discovered in Haswell and some Broadwell CPUs

By Scorpus ยท 9 replies
Aug 13, 2014
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  1. One of the new features included with Intel's Haswell CPUs was Transactional Synchronization Extensions, or TSX. This set of instructions can improve the performance of multi-threaded applications when a developer uses its corresponding library, and was touted as one of the...

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  2. ypsylon

    ypsylon TS Booster Posts: 114   +21

    Somebody please explain to Intel what errata (since ancient times) means. Seems like some breakdown in communication and understanding of a simple word...

    Or perhaps is that some kind of newspeak?
  3. captaincranky

    captaincranky TechSpot Addict Posts: 13,021   +2,553
  4. dividebyzero

    dividebyzero trainee n00b Posts: 4,891   +1,264

    It's my understanding that erratum refers to a correction issued after printing. The fact that Intel are issuing a correction to expected program execution due to incorrect printing (lithography) of the IC's logic blocks seems within the purview of the word.
    The term errata has been interchangeable between the actual list and the events contained within the list since they started publishing erroneous IC behaviour in February 1996 following the Pentium FDIV bug.
  5. yukka

    yukka TechSpot Paladin Posts: 861   +67

    So this affects Haswell macs I assume as well?
  6. dividebyzero

    dividebyzero trainee n00b Posts: 4,891   +1,264

    Same silicon.
    As for the degree the bug affects Haswell, the TSX ISA extension isn't used in any commercial software at this time.
  7. Darth Shiv

    Darth Shiv TS Evangelist Posts: 1,811   +472

    There certainly won't be mature software based on the tech! Often when doing microcode updates for issues like this, they don't disable the feature entirely but put in a clunky workaround so it must have been a fair showstopper.
  8. Ok.. basically some government detected that TSX was espionage for the NSA and forced intel to disable it, of course that the government that did this is corrupt... and received billions to shut up, very soon some government is going to show great economic success...
  9. After reading this news some days ago I decided to check if TSX was still enabled on my DZ87KLT-75K + Core i7-4770K to my surprise the TSX was disabled by Intel on the DZ87KLT-75K by the BIOS 0452 which had a Processor Update/Microcode Update on the release note those were the only new things in that BIOS which we thought were for haswell refresh but we were told in the Intel community that it was not for haswell support rather a microcode update now I know what it was intended for.
  10. cowcreekgeek

    cowcreekgeek TS Rookie

    ERRATA, in regard to Intel, was what I thought to be an acronym created by upper-level management, for ERRoneous Atempts To Air-cool 5.0+GHz.

    But, back to this one -- TSX is far more than merely some unimportant feature to some folks, and for far more than server-related applications. In fact? It's the most compelling reason I had for my latest build: This feature held the greatest potential for increasing productivity that I've seen in years, and seeing it disabled by default is a tragedy.

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