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On 9/2/24 14:58, Chris M. Thomasson wrote:I have not conversed with Alex in a long time; just hoping that you might have kept in touch with him. c.p.t is dead. I was just reminiscing...On 9/2/2024 11:55 AM, Chris M. Thomasson wrote:What, where? c.p.t. is gone. It's crickets everywhere else.On 9/2/2024 10:27 AM, jseigh wrote:>I read that arm added the cas instruction because they didn't think>
ldxr/stxr would scale well. It wasn't clear to me as to why that
would be the case. I would think the memory lock mechanism would
have really low overhead vs cas having to do an interlocked load
and store. Unless maybe the memory lock size might be large
enough to cause false sharing issues. Any ideas?
Reservation granularity? Wrt the PPC, wow this an older thread:
>
https://groups.google.com/g/comp.arch/c/yREvvvKvr6k/m/nRZ5tpLwDNQJ
>
LL/SC can spuriously fail... It's more obstruction free than lock-free? I think this is why a strong and weak CAS are in the C/C++ std's?
>
Btw, have you talked with Alexander Terekhov lately? He is a smart guy. :^)
Date | Sujet | # | Auteur | |
2 Sep 24 | arm ldxr/stxr vs cas | 58 | jseigh | |
2 Sep 24 | Re: arm ldxr/stxr vs cas | 4 | Chris M. Thomasson | |
2 Sep 24 | Re: arm ldxr/stxr vs cas | 3 | Chris M. Thomasson | |
2 Sep 24 | Re: arm ldxr/stxr vs cas | 2 | jseigh | |
2 Sep 24 | Re: arm ldxr/stxr vs cas | 1 | Chris M. Thomasson | |
4 Sep 24 | Re: arm ldxr/stxr vs cas | 50 | MitchAlsup1 | |
5 Sep 24 | Re: arm ldxr/stxr vs cas | 3 | Chris M. Thomasson | |
5 Sep 24 | Re: arm ldxr/stxr vs cas | 2 | MitchAlsup1 | |
5 Sep 24 | Re: arm ldxr/stxr vs cas | 1 | Chris M. Thomasson | |
5 Sep 24 | Re: arm ldxr/stxr vs cas | 46 | jseigh | |
5 Sep 24 | Re: arm ldxr/stxr vs cas | 1 | Anton Ertl | |
5 Sep 24 | Re: arm ldxr/stxr vs cas | 44 | MitchAlsup1 | |
5 Sep 24 | Re: arm ldxr/stxr vs cas | 43 | Chris M. Thomasson | |
5 Sep 24 | Re: arm ldxr/stxr vs cas | 42 | jseigh | |
6 Sep 24 | Re: arm ldxr/stxr vs cas | 1 | MitchAlsup1 | |
6 Sep 24 | Re: arm ldxr/stxr vs cas | 20 | Chris M. Thomasson | |
6 Sep 24 | Re: arm ldxr/stxr vs cas | 19 | MitchAlsup1 | |
7 Sep 24 | Re: arm ldxr/stxr vs cas | 18 | jseigh | |
8 Sep 24 | Re: arm ldxr/stxr vs cas | 17 | Chris M. Thomasson | |
8 Sep 24 | Re: arm ldxr/stxr vs cas | 16 | Chris M. Thomasson | |
8 Sep 24 | Re: arm ldxr/stxr vs cas | 15 | Chris M. Thomasson | |
8 Sep 24 | Re: arm ldxr/stxr vs cas | 14 | MitchAlsup1 | |
8 Sep 24 | Re: arm ldxr/stxr vs cas | 4 | Chris M. Thomasson | |
8 Sep 24 | Re: arm ldxr/stxr vs cas | 1 | Chris M. Thomasson | |
8 Sep 24 | Re: arm ldxr/stxr vs cas | 2 | jseigh | |
8 Sep 24 | Re: arm ldxr/stxr vs cas | 1 | Chris M. Thomasson | |
8 Sep 24 | Re: arm ldxr/stxr vs cas | 9 | Chris M. Thomasson | |
8 Sep 24 | Re: arm ldxr/stxr vs cas | 6 | Michael S | |
8 Sep 24 | Re: arm ldxr/stxr vs cas | 1 | Chris M. Thomasson | |
8 Sep 24 | Re: arm ldxr/stxr vs cas | 1 | Chris M. Thomasson | |
9 Sep 24 | Re: arm ldxr/stxr vs cas | 3 | Michael S | |
9 Sep 24 | Re: arm ldxr/stxr vs cas | 2 | Michael S | |
9 Sep 24 | Re: arm ldxr/stxr vs cas | 1 | Michael S | |
8 Sep 24 | Re: arm ldxr/stxr vs cas | 1 | MitchAlsup1 | |
8 Sep 24 | Re: arm ldxr/stxr vs cas | 1 | Chris M. Thomasson | |
9 Sep 24 | Re: arm ldxr/stxr vs cas | 20 | Terje Mathisen | |
9 Sep 24 | Re: arm ldxr/stxr vs cas | 11 | jseigh | |
9 Sep 24 | Re: arm ldxr/stxr vs cas | 6 | Chris M. Thomasson | |
10 Sep 24 | Re: arm ldxr/stxr vs cas | 5 | jseigh | |
10 Sep 24 | Re: arm ldxr/stxr vs cas | 4 | Chris M. Thomasson | |
10 Sep 24 | Re: arm ldxr/stxr vs cas | 3 | jseigh | |
11 Sep 24 | Re: arm ldxr/stxr vs cas | 2 | Chris M. Thomasson | |
11 Sep 24 | Re: arm ldxr/stxr vs cas | 1 | Chris M. Thomasson | |
10 Sep 24 | Re: arm ldxr/stxr vs cas | 4 | Terje Mathisen | |
10 Sep 24 | Re: arm ldxr/stxr vs cas | 3 | jseigh | |
10 Sep 24 | Re: arm ldxr/stxr vs cas | 1 | Chris M. Thomasson | |
10 Sep 24 | Re: arm ldxr/stxr vs cas | 1 | Chris M. Thomasson | |
9 Sep 24 | Re: arm ldxr/stxr vs cas | 1 | Chris M. Thomasson | |
11 Sep 24 | Re: arm ldxr/stxr vs cas | 7 | Paul A. Clayton | |
11 Sep 24 | Re: arm ldxr/stxr vs cas | 2 | Chris M. Thomasson | |
11 Sep 24 | Re: arm ldxr/stxr vs cas | 1 | Chris M. Thomasson | |
11 Sep 24 | Re: arm ldxr/stxr vs cas | 2 | jseigh | |
11 Sep 24 | Re: arm ldxr/stxr vs cas | 1 | Chris M. Thomasson | |
11 Sep 24 | Re: arm ldxr/stxr vs cas | 2 | Stefan Monnier | |
12 Sep 24 | Re: arm ldxr/stxr vs cas | 1 | Chris M. Thomasson | |
9 Sep 24 | Re: arm ldxr/stxr vs cas | 3 | jseigh | |
11 Sep 24 | Re: arm ldxr/stxr vs cas | 2 | jseigh | |
11 Sep 24 | Re: arm ldxr/stxr vs cas | 1 | Chris M. Thomasson |
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