Question Zen 6 Speculation Thread

[RnR_au]

GPT-OSS at what size?

The big one is doable with llama.cpp inference engine and cpu offloading;

https://www.reddit.com/r/LocalLLaMA/comments/1ofxt6s/optimizing_gptoss120b_on_amd_rx_6900_xt_16gb

 

[CouncilorIrissa]

https://twitter.com/x/status/2033451425263440210

Zen0.6%

Spoiler: freq from .gb6

"processor_frequency": {
"frequencies": [
2006,
1529,
1388,
1387,
1387,
1369,
1389,
1388,
1387,
1383,
1387,
1386,
1388,
1388,
1387
]
},

 

[Geddagod]

https://twitter.com/x/status/2033451425263440210

Zen0.6%

Spoiler: freq from .gb6

"processor_frequency": {
"frequencies": [
2006,
1529,
1388,
1387,
1387,
1369,
1389,
1388,
1387,
1383,
1387,
1386,
1388,
1388,
1387
]
},

32MB L3? Surprising. Is each core, dense or classic, getting the full 4MB of L3 per core? And are they all in one cluster, unlike strix point?
Also, still only 32KB of LIi? Is this not surprising?

 

[CouncilorIrissa]

Also, still only 32KB of LIi? Is this not surprising?

Not really, it's still Family 1Ah.
The only time they changed L1 capacity within a family was Zen 1 -> 2. Them changing even the scheduler layout within a family is surprising.

32MB L3? Surprising. Is each core, dense or classic, getting the full 4MB of L3 per core? And are they all in one cluster, unlike strix point?

No idea.

 

[Geddagod]

Not really, it's still Family 1Ah.
The only time they changed L1 capacity within a family was Zen 1 -> 2. Them changing even the scheduler layout within a family is surprising.

RWC from GLC doubled the L1i cache on a tick core T-T
But given Zen 5's weaknesses, increasing the L1i capacity sounded like it would be extremely helpful. Maybe the L1i prefetch significantly improved, or they beefed up the uop cache even more.

No idea.

I do think it's a "phoenix-2" like setup where it's all in one cluster. Since this is an ES, it could be misreporting, but if they were in separate clusters I imagine it would just not be able to differentiate or add the L3 from another cluster rather than accidentally combining them.

 

[Tuna-Fish]

Zen0.6%

Zen6 is supposed to get the performance boost from clocks, right? A low-clocked ES should not tell you anything about the performance then.

 

[adroc_thurston]

Zen6 is supposed to get the performance boost from clocks, right? A low-clocked ES should not tell you anything about the performance then.

And IPC.
Good luck reading perf from a crippled RVP, though.

 

[adroc_thurston]

32MB L3? Surprising. Is each core, dense or classic, getting the full 4MB of L3 per core? And are they all in one cluster, unlike strix point?
Also, still only 32KB of LIi? Is this not surprising?

Don't read into it at all.
You won't ever know what's actually inside unless you have a special signed build of GB6/7.

 

[CouncilorIrissa]

Zen6 is supposed to get the performance boost from clocks, right? A low-clocked ES should not tell you anything about the performance then.

I'm memeing.
Trying to read into performance from 1.4-2.0 GHz region is indeed pointless.

 

[jdubs03]

Don't read into it at all.
You won't ever know what's actually inside unless you have a special signed build of GB6/7.

Been wondering when Geekbench 7 will come out. Has to be getting pretty close.

 

[adroc_thurston]

Been wondering when Geekbench 7 will come out. Has to be getting pretty close.

Pretty sure it should've been out already.
Oh well.

 

[StefanR5R]

"processor_frequency": {
"frequencies": [
2006,
1529,
1388,
1387,
1387,
1369,
1389,
1388,
1387,
1383,
1387,
1386,
1388,
1388,
1387
]
},

Why are there 15 processor frequencies reported? I am entirely ignorant of what GB6 is doing, but I would have expected it to show as many frequencies as there are logical CPUs in a system. Is this a new 5-core CPU with SMT3? ;-)

 

[branch_suggestion]

https://twitter.com/x/status/2033451425263440210

Zen0.6%

Spoiler: freq from .gb6

"processor_frequency": {
"frequencies": [
2006,
1529,
1388,
1387,
1387,
1369,
1389,
1388,
1387,
1383,
1387,
1386,
1388,
1388,
1387
]
},

Of course the first Z6 leak is MDS1 with clearly unrepresentative results.
Well things will only accelerate from here.

 

[CouncilorIrissa]

Why are there 15 processor frequencies reported? I am entirely ignorant of what GB6 is doing, but I would have expected it to show as many frequencies as there are logical CPUs in a system. Is this a new 5-core CPU with SMT3? ;-)

I'm just guessing, but I think these are clock readings at different points in time. Some 10-core chips have like 30 readings over the course of a run for example.

 

[adroc_thurston]

Of course the first Z6 leak is MDS1 with clearly unrepresentative results.
Well things will only accelerate from here.

Si's been out for a while too. funny.

 

[poke01]

Been wondering when Geekbench 7 will come out. Has to be getting pretty close.

John said sometime this year

 

[511]

John said sometime this year

John who?

 

[adroc_thurston]

John who?

Poole.
Primatelabs head honcho.

 

[poke01]

John who?

John Poole, the guy who made Geekbench

 

[511]

I always assume it's John Cena whenever someone mentions John.

 

[Jan Olšan]

https://twitter.com/x/status/2033451425263440210

Zen0.6%

Spoiler: freq from .gb6

"processor_frequency": {
"frequencies": [
2006,
1529,
1388,
1387,
1387,
1369,
1389,
1388,
1387,
1383,
1387,
1386,
1388,
1388,
1387
]
},

If you extrapolate the score from the 1.4 GHz clock to 5.7 GHz and assume the usual GB6 score for Zen 5 core at 5.7 GHz is 3550 points, it turns out the IPC has gone up by... /drumroll/

Spoiler: wait for it

38 %

/badum-tssss/

 

[adroc_thurston]

I always assume it's John Cena whenever someone mentions John.

John Cena? The Pluribus cameo actor?

 

[511]

John Cena? The Pluribus cameo actor?

i obliviously meant this guy


anyway back to Zen 6 thread

 

[coercitiv]

I'm just guessing, but I think these are clock readings at different points in time. Some 10-core chips have like 30 readings over the course of a run for example.

Indeed.

Here to confirm this guess is the itsy bitsy Atom 450, a single-core CPU with a nominal speed of 1.67 Ghz and 17 frequency readings in GB6.

Spoiler

 

[Hulk]

I'm memeing.
Trying to read into performance from 1.4-2.0 GHz region is indeed pointless.

Indeed. Looking at the ST score if the frequency is 2.0 then performance is flat over Lion Cove. If frequency is 1.4 then we're looking at 45% better than Lion Cove. Obviously reality is somewhere in the middle, which we could have guessed 10 years ago so the information is meaningless.