By: rwessel (robertwessel.delete@this.yahoo.com), August 31, 2012 8:54 pm
Room: Moderated Discussions
Paul A. Clayton (paaronclayton.delete@this.gmail.com) on August 28, 2012 10:28 am wrote:
> Using the cache line size does have the minor annoyance
> that performance portability becomes more difficult. (The Alpha architectural
> suggestion for portability of not placing two atomic operands within the same 8
> KiB page seems a bit excessive.) Fixing the maximum "monitor-line" size at 64
> bytes might not be unreasonable in order to simplify portable software.
While it might have been changed subsequently, the original Alpha architectural suggestion was that such items be quadword aligned and in their own "large cache block", which were defined as "likely be(ing) 32, 64, 128 or 256 bytes".
> Using the cache line size does have the minor annoyance
> that performance portability becomes more difficult. (The Alpha architectural
> suggestion for portability of not placing two atomic operands within the same 8
> KiB page seems a bit excessive.) Fixing the maximum "monitor-line" size at 64
> bytes might not be unreasonable in order to simplify portable software.
While it might have been changed subsequently, the original Alpha architectural suggestion was that such items be quadword aligned and in their own "large cache block", which were defined as "likely be(ing) 32, 64, 128 or 256 bytes".
| Topic | Posted By | Date |
|---|---|---|
| Article: Haswell TM Alternatives | David Kanter | 2012/08/21 10:17 PM |
| Article: Haswell TM Alternatives | Håkan Winbom | 2012/08/22 12:52 AM |
| Article: Haswell TM Alternatives | David Kanter | 2012/08/22 02:06 AM |
| Article: Haswell TM Alternatives | anon | 2012/08/22 09:46 AM |
| Article: Haswell TM Alternatives | Linus Torvalds | 2012/08/22 10:16 AM |
| Article: Haswell TM Alternatives | Doug S | 2012/08/24 09:34 AM |
| AMD's ASF even more limited | Paul A. Clayton | 2012/08/22 10:20 AM |
| AMD's ASF even more limited | Linus Torvalds | 2012/08/22 10:41 AM |
| Compiler use of ll/sc? | Paul A. Clayton | 2012/08/28 10:28 AM |
| Compiler use of ll/sc? | Linus Torvalds | 2012/09/08 01:58 PM |
| Lock recognition? | Paul A. Clayton | 2012/09/10 02:17 PM |
| Sorry, I was confused | Paul A. Clayton | 2012/09/13 11:56 AM |
| Filter to detect store conflicts | Paul A. Clayton | 2012/08/22 10:19 AM |
| Article: Haswell TM Alternatives | bakaneko | 2012/08/22 03:02 PM |
| Article: Haswell TM Alternatives | David Kanter | 2012/08/22 03:45 PM |
| Article: Haswell TM Alternatives | bakaneko | 2012/08/22 10:56 PM |
| Cache line granularity? | Paul A. Clayton | 2012/08/28 10:28 AM |
| Cache line granularity? | David Kanter | 2012/08/31 09:13 AM |
| A looser definition might have advantages | Paul A. Clayton | 2012/09/01 07:29 AM |
| Cache line granularity? | rwessel | 2012/08/31 08:54 PM |
| Alpha load locked granularity | Paul A. Clayton | 2012/09/01 07:29 AM |
| Alpha load locked granularity | anon | 2012/09/02 06:23 PM |
| Alpha pages groups | Paul A. Clayton | 2012/09/03 05:16 AM |
| An alternative implementation | Maynard Handley | 2012/11/20 10:52 PM |
| An alternative implementation | bakaneko | 2012/11/21 06:52 AM |
| Guarding unread values? | Paul A. Clayton | 2012/11/21 09:39 AM |
| Guarding unread values? | bakaneko | 2012/11/21 12:25 PM |
| TM granularity and versioning | Paul A. Clayton | 2012/11/21 09:27 AM |
| TM granularity and versioning | Maynard Handley | 2012/11/21 11:52 AM |
| Indeed, TM (and coherence) has devilish details (NT) | Paul A. Clayton | 2012/11/21 11:56 AM |