Intel® ISA Extensions
Use hardware-based isolation and memory encryption to provide more code protection in your solutions.
1116 Discussions

Intel TSX with STAMP benchmark

YangHun_P_
Beginner
‎05-19-2016 11:58 PM
515 Views

when running vacation application in stamp benchmark, there are several code defined as TM_RESTART.

First, i think that it would be okay that _xabort will restart the transactions.

But, when the transaction fails to commit, it should goes to fallback path with a lock. In this case how to go back to the _xbegin when transaction should be restarted?

0 Kudos

Link Copied

1 Reply
Roman_D_Intel
Employee
‎05-20-2016 07:35 AM
515 Views

Hi,

xabort instruction has a constant 8-bit argument that is passed to the transaction abort handler (see the abort status returned by _xbegin() intrinsic: the upper 8 bits [24:31]). For TM_RESTART you can define a special constant value that can be recognized in your abort handler and handled appropriately (i.e. restart transaction, do not take the fall-back lock).

Thanks,

Roman

0 Kudos
Copy link
Reply

Community support is provided Monday to Friday. Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

For more complete information about compiler optimizations, see our Optimization Notice.