[HN Gopher] A Comparison of ARM Cortex-A Series Processor Perfor...
___________________________________________________________________
A Comparison of ARM Cortex-A Series Processor Performance
Classifications
Author : teleforce
Score : 25 points
Date : 2023-09-28 05:40 UTC (17 hours ago)
(HTM) web link (www.forlinx.net)
(TXT) w3m dump (www.forlinx.net)
| dmitrygr wrote:
| This is a museum piece, missing most of the last 7 years of ARM
| cores
| meepmorp wrote:
| > This is ARM's latest A-Series processor released in 2016, the
| Cortex-A73 supports full-size ARMv8-A architecture, and the
| ARMv8-A is ARM's first processor architecture to support 64-bit
| instruction sets, including ARM TrustZone, NEON, virtualization,
| and encryption.
|
| The article is 6-7 years old.
| zauguin wrote:
| (2017) (?) (Based on referring to the Cortex A73 as "ARM's latest
| A-Series processor")
| uxp8u61q wrote:
| Blog posts without a date are a scourge.
| schaefer wrote:
| If this write-up has a target audience, I'm in it.
|
| However... the graphics are pulled directly off the ARM
| website[1] and IMO, having an automatic pop-up on the page that
| says "talk to us about sales" subverts the good will that could
| other wise have been generated.
|
| Finally, anyone who tries to tell me that A53 is "high-end" in
| 2023 will get some side-eye.
|
| [1]: https://www.arm.com/products/silicon-ip-
| cpu/cortex-a/cortex-...
| dragontamer wrote:
| > Finally, anyone who tries to tell me that A53 is "high-end"
| in 2023 will get some side-eye.
|
| You know that Microchip's SAM9x60 from 2020 is running
| ARM926EJ-S (aka: ARMv5) with J for Jazelle instructions, right?
|
| "Embedded" world moves slower than consumer world. ARM
| Cortex-A53 is high-end for embedded. This is a world where 8051
| and Z80 chips are still being made.
|
| ----------
|
| I feel like a lot of MPUs released in the last 2 years (i.MX
| from NXP, STM32MP1 and soon-to-be-released MP2, etc. etc.) are
| in the ARM-Cortex A7-ish tier.
| RicoElectrico wrote:
| Any advantage to use ARMv5 at this point? Knowing that ARM
| designs a whole spectrum of processors over
| performance/power/area triangle, has there really been no
| alternative?
| dragontamer wrote:
| Its an eye-raising decision for sure, but this is literally
| Microchip's most recent MPU design. Microchip has Cortex-A5
| and Cortex-A7 chips available for those who want them. But
| the most recently released chip is in fact SAM9X60.
|
| My assumption is that Microchip has a large customer who is
| demanding as perfect of a match to some 20+ year old
| design, and Microchip is more than happy to produce this
| ancient design for them.
|
| ARM926EJ-S gives us a big hint: J for Jazelle. If some
| customer has some old Embedded Jazelle/Java code that they
| haven't bothered to update in the last 20 years, perhaps
| its easier for Microchip to just keep making ARM926EJ-S
| rather than forcing them to upgrade to Cortex-A5 or A7
| (which although newer... these newer chips have all gotten
| rid of Jazelle / hardware execution of Java code).
|
| -------------------
|
| Code-wise, there's probably a lot of downsides. But
| electrically speaking, the SAM9X60 is an extremely well
| designed BGA with well-matched VCC/GND pins that has a
| 4-layer reference design. (Or at least: the SiP version
| SAM9X60-D1G). In a world where 6, 8, or 10-layer designs
| are commonly needed to route DDR-RAM, seeing a 4-layer
| board reference design is pretty nuts (https://ww1.microchi
| p.com/downloads/en/Appnotes/AN_3311_SAM9... as well as the
| 4-layer DDR2 layout that was validated on: https://ww1.micr
| ochip.com/downloads/en/Appnotes/AN_3310_Conn...).
|
| Designing an 14mm x 14mm BGA223 that can be routed on a
| 4-layer board is no small feat. And therefore, this is
| probably one of the easiest BGAs to layout for a beginner,
| and lowers your PCB production costs.
| IvanMilatForPM wrote:
| [dead]
___________________________________________________________________
(page generated 2023-09-28 23:02 UTC)