Re: Arm ldaxr / stxr loop question

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Sujet : Re: Arm ldaxr / stxr loop question
De : chris.m.thomasson.1 (at) *nospam* gmail.com (Chris M. Thomasson)
Groupes : comp.arch
Date : 09. Nov 2024, 22:08:31
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <vgoj0f$3v1o0$1@dont-email.me>
References : 1 2 3 4 5 6 7 8 9
User-Agent : Mozilla Thunderbird
On 11/9/2024 6:23 AM, Scott Lurndal wrote:
EricP <ThatWouldBeTelling@thevillage.com> writes:
Chris M. Thomasson wrote:
On 11/8/2024 2:56 PM, Chris M. Thomasson wrote:
>
Perhaps sometime tonight. Is seems like optimistic LL/SC instead of
pessimistic CAS RMW type of logic?
>
LL/SC vs cmpxchg8b?
>
Arm A64 has LDXP Load Exclusive Pair of registers and
STXP Store Exclusive Pair of registers looks like it can be
equivalent to cmpxchg16b (aka double-wide compare and swap).
 Aarch64 also has CASP, a 128-bit atomic compare and swap
instruction.
Ohhhhhh... That's nice! So, we can use both flavors wrt optimistic and pessimistic? Fwiw, I still did not get a chance to read up on the docs you so kindly linked me to.

Date Sujet#  Auteur
28 Oct 24 * Arm ldaxr / stxr loop question136jseigh
31 Oct 24 +- Re: Arm ldaxr / stxr loop question1MitchAlsup1
31 Oct 24 +- Re: Arm ldaxr / stxr loop question1Chris M. Thomasson
1 Nov 24 +* Re: Arm ldaxr / stxr loop question124aph
2 Nov 24 i`* Re: Arm ldaxr / stxr loop question123Chris M. Thomasson
8 Nov 24 i `* Re: Arm ldaxr / stxr loop question122Chris M. Thomasson
8 Nov 24 i  `* Re: Arm ldaxr / stxr loop question121Chris M. Thomasson
9 Nov 24 i   +* Re: Arm ldaxr / stxr loop question118Chris M. Thomasson
9 Nov 24 i   i+- Re: Arm ldaxr / stxr loop question1Chris M. Thomasson
11 Nov 24 i   i+* Re: Arm ldaxr / stxr loop question5MitchAlsup1
11 Nov 24 i   ii+- Re: Arm ldaxr / stxr loop question1Michael S
11 Nov 24 i   ii`* Re: Arm ldaxr / stxr loop question3jseigh
11 Nov 24 i   ii `* Re: Arm ldaxr / stxr loop question2Chris M. Thomasson
12 Nov 24 i   ii  `- Re: Arm ldaxr / stxr loop question1Chris M. Thomasson
11 Nov 24 i   i+- Re: Arm ldaxr / stxr loop question1Michael S
11 Nov 24 i   i+- Re: Arm ldaxr / stxr loop question1Chris M. Thomasson
12 Nov 24 i   i+* Re: Arm ldaxr / stxr loop question23aph
12 Nov 24 i   ii+* Re: Arm ldaxr / stxr loop question18Chris M. Thomasson
13 Nov 24 i   iii`* Re: Arm ldaxr / stxr loop question17aph
13 Nov 24 i   iii +* Re: Arm ldaxr / stxr loop question3jseigh
13 Nov 24 i   iii i`* Re: Arm ldaxr / stxr loop question2aph
13 Nov 24 i   iii i `- Re: Arm ldaxr / stxr loop question1Chris M. Thomasson
13 Nov 24 i   iii +- Re: Arm ldaxr / stxr loop question1MitchAlsup1
13 Nov 24 i   iii +* Re: Arm ldaxr / stxr loop question2Chris M. Thomasson
13 Nov 24 i   iii i`- Re: Arm ldaxr / stxr loop question1Chris M. Thomasson
13 Nov 24 i   iii +* Re: Arm ldaxr / stxr loop question2Chris M. Thomasson
13 Nov 24 i   iii i`- Re: Arm ldaxr / stxr loop question1Chris M. Thomasson
13 Nov 24 i   iii `* Re: Arm ldaxr / stxr loop question8Terje Mathisen
13 Nov 24 i   iii  +* Brilliance (was: Arm ldaxr / stxr loop question)4Anton Ertl
13 Nov 24 i   iii  i+- Re: Brilliance1BGB
14 Nov 24 i   iii  i`* Re: Brilliance2Terje Mathisen
16 Nov 24 i   iii  i `- Re: Brilliance1Thomas Koenig
13 Nov 24 i   iii  `* Re: Arm ldaxr / stxr loop question3aph
14 Nov 24 i   iii   `* Re: Arm ldaxr / stxr loop question2Terje Mathisen
14 Nov 24 i   iii    `- Re: Arm ldaxr / stxr loop question1Chris M. Thomasson
12 Nov 24 i   ii`* Re: Arm ldaxr / stxr loop question4BGB
13 Nov 24 i   ii `* Re: Arm ldaxr / stxr loop question3Chris M. Thomasson
13 Nov 24 i   ii  `* Re: Arm ldaxr / stxr loop question2Robert Finch
26 Dec 24 i   ii   `- Re: Arm ldaxr / stxr loop question1Chris M. Thomasson
14 Nov 24 i   i`* Re: Arm ldaxr / stxr loop question86Kent Dickey
14 Nov 24 i   i `* Re: Arm ldaxr / stxr loop question85aph
14 Nov 24 i   i  +* Re: Arm ldaxr / stxr loop question81Chris M. Thomasson
15 Nov 24 i   i  i`* Re: Arm ldaxr / stxr loop question80aph
15 Nov 24 i   i  i +- Re: Arm ldaxr / stxr loop question1Chris M. Thomasson
15 Nov 24 i   i  i `* Memory ordering (was: Arm ldaxr / stxr loop question)78Anton Ertl
15 Nov 24 i   i  i  +* Re: Memory ordering44Chris M. Thomasson
15 Nov 24 i   i  i  i`* Re: Memory ordering43Michael S
15 Nov 24 i   i  i  i `* Re: Memory ordering42Chris M. Thomasson
16 Nov 24 i   i  i  i  `* Re: Memory ordering41Chris M. Thomasson
16 Nov 24 i   i  i  i   +- Re: Memory ordering1Chris M. Thomasson
17 Nov 24 i   i  i  i   `* Re: Memory ordering39jseigh
17 Nov 24 i   i  i  i    +* Re: Memory ordering33Anton Ertl
19 Nov 24 i   i  i  i    i`* Re: Memory ordering32Chris M. Thomasson
3 Dec 24 i   i  i  i    i `* Re: Memory ordering31Anton Ertl
3 Dec 24 i   i  i  i    i  `* Re: Memory ordering30jseigh
3 Dec 24 i   i  i  i    i   `* Re: Memory ordering29MitchAlsup1
4 Dec 24 i   i  i  i    i    +* Re: Memory ordering22Stefan Monnier
4 Dec 24 i   i  i  i    i    i+* Re: Memory ordering3MitchAlsup1
4 Dec 24 i   i  i  i    i    ii`* Re: Memory ordering2Stefan Monnier
4 Dec 24 i   i  i  i    i    ii `- Re: Memory ordering1MitchAlsup1
4 Dec 24 i   i  i  i    i    i`* Re: Memory ordering18jseigh
5 Dec 24 i   i  i  i    i    i `* Re: Memory ordering17Chris M. Thomasson
5 Dec 24 i   i  i  i    i    i  +* Re: Memory ordering8jseigh
16 Dec 24 i   i  i  i    i    i  i`* Re: Memory ordering7Chris M. Thomasson
17 Dec 24 i   i  i  i    i    i  i `* Re: Memory ordering6jseigh
17 Dec 24 i   i  i  i    i    i  i  +- Re: Memory ordering1aph
17 Dec 24 i   i  i  i    i    i  i  `* Re: Memory ordering4Chris M. Thomasson
17 Dec 24 i   i  i  i    i    i  i   +- Re: Memory ordering1MitchAlsup1
18 Dec 24 i   i  i  i    i    i  i   `* Re: Memory ordering2jseigh
19 Dec 24 i   i  i  i    i    i  i    `- Re: Memory ordering1Chris M. Thomasson
19 Dec 24 i   i  i  i    i    i  `* Re: Memory ordering8MitchAlsup1
19 Dec 24 i   i  i  i    i    i   `* Re: Memory ordering7Chris M. Thomasson
20 Dec 24 i   i  i  i    i    i    +* Re: Memory ordering5MitchAlsup1
20 Dec 24 i   i  i  i    i    i    i+* Re: Memory ordering2Chris M. Thomasson
20 Dec 24 i   i  i  i    i    i    ii`- Re: Memory ordering1Chris M. Thomasson
20 Dec 24 i   i  i  i    i    i    i`* Re: Memory ordering2Chris M. Thomasson
20 Dec 24 i   i  i  i    i    i    i `- Re: Memory ordering1Chris M. Thomasson
20 Dec 24 i   i  i  i    i    i    `- Re: Memory ordering1Chris M. Thomasson
4 Dec 24 i   i  i  i    i    +- Re: Memory ordering1Chris M. Thomasson
4 Dec 24 i   i  i  i    i    +- Re: Memory ordering1MitchAlsup1
5 Dec 24 i   i  i  i    i    `* Re: Memory ordering4Tim Rentsch
6 Dec 24 i   i  i  i    i     +* Re: Memory ordering2Terje Mathisen
6 Dec 24 i   i  i  i    i     i`- Re: Memory ordering1Tim Rentsch
20 Dec 24 i   i  i  i    i     `- Re: Memory ordering1Chris M. Thomasson
17 Nov 24 i   i  i  i    +* Re: Memory ordering2Chris M. Thomasson
19 Nov 24 i   i  i  i    i`- Re: Memory ordering1Chris M. Thomasson
18 Nov 24 i   i  i  i    +- Re: Memory ordering1aph
20 Nov 24 i   i  i  i    +- Re: Memory ordering1Chris M. Thomasson
20 Nov 24 i   i  i  i    `- Re: Memory ordering1Chris M. Thomasson
15 Nov 24 i   i  i  +* Re: Memory ordering (was: Arm ldaxr / stxr loop question)2Michael S
15 Nov 24 i   i  i  i`- Re: Memory ordering (was: Arm ldaxr / stxr loop question)1Anton Ertl
15 Nov 24 i   i  i  +* Re: Memory ordering28jseigh
15 Nov 24 i   i  i  i`* Re: Memory ordering27Anton Ertl
15 Nov 24 i   i  i  i +* Re: Memory ordering18Chris M. Thomasson
16 Nov 24 i   i  i  i i`* Re: Memory ordering17Anton Ertl
16 Nov 24 i   i  i  i i `* Re: Memory ordering16Chris M. Thomasson
17 Nov 24 i   i  i  i i  `* Re: Memory ordering15Anton Ertl
18 Nov 24 i   i  i  i i   `* Re: Memory ordering14Chris M. Thomasson
18 Nov 24 i   i  i  i i    `* Re: Memory ordering13Anton Ertl
19 Nov 24 i   i  i  i i     `* Re: Memory ordering12Chris M. Thomasson
19 Nov 24 i   i  i  i i      `* Re: Memory ordering11Chris M. Thomasson
15 Nov 24 i   i  i  i +* Re: Memory ordering7BGB
17 Nov 24 i   i  i  i `- Re: Memory ordering1Tim Rentsch
16 Nov 24 i   i  i  +- Re: Memory ordering (was: Arm ldaxr / stxr loop question)1Anton Ertl
16 Nov 24 i   i  i  +- Re: Memory ordering (was: Arm ldaxr / stxr loop question)1Lawrence D'Oliveiro
18 Nov 24 i   i  i  `- Re: Memory ordering1aph
21 Nov 24 i   i  `* Re: Arm ldaxr / stxr loop question3Kent Dickey
9 Nov 24 i   `* Re: Arm ldaxr / stxr loop question2jseigh
8 Nov 24 +* Re: Arm ldaxr / stxr loop question8Lawrence D'Oliveiro
20 Dec 24 `- Re: Arm ldaxr / stxr loop question1Chris M. Thomasson

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