3 ms·

>a lot of low-level optimization will have been done And a lot has already been done, actually. A significant amount of it prompted by VisionFive 2's very avai

by snvzz 3y ago

>a lot of low-level optimization will have been done And a lot has already been done, actually. A significant amount of it prompted by VisionFive 2's very availability, as the first mass-produced RISC-V SBC. Unfortunately, the Phoronix benchmark doesn't reflect any progress made since the Debian snapshot date, which is over a year old, and thus much older than the VisionFive 2 indiegogo fulfillment date (March 2023).

mixmastamyk 3y ago
Bummer, has anyone told Mr. Larabel? Seems like this shouldn't be up in such detail if it is significantly wrong. Edit: There is some awareness: https://www.phoronix.com/forums/forum/phoronix/latest-phoronix-articles/1404009-starfive-visionfive-2-quad-core-risc-v-performance-benchmarks https://www.phoronix.com/forums/forum/phoronix/latest-phoron... Folks there say this chip config is intrinsically weaker and even optimization won't substantially help.
- snvzz 3y ago
  >Folks there say this chip config is intrinsically weaker and even optimization won't substantially help. The Sipeed Lichee Pi4a page has some performance graphs[0]. Their chip is a decent bump in performance, but notice how the JH7110, which they also included in their testing, does much better with a proper toolchain. This is in line with what VisionFive 2 owners (like me) have seen on their own boards. Nearly nobody uses the official image, because it really is that old and limited. 0. https://sipeed.com/licheepi4a https://sipeed.com/licheepi4a
  - mixmastamyk 3y ago
    Nice, looks like a 30-40% bump.
- brucehoult 3y ago
  > Folks there say this chip config is intrinsically weaker and even optimization won't substantially help. The U74 does exactly what it was designed to do -- be a power-sipping dual-issue [1] in-order "efficiency" CPU, similar to Arm's A53 (2012), A55 (2017), A510 (2021), A520 (2023) series. Yes, Arm is still designing and shipping brand-new core designs similar to the U74. They have much faster cores as well, but efficiency cores are important and run the show in phones and tablets most of the time. This kind of core design is slower than wide Out-of-Order cores, but they use vastly less silicon area and achieve the most computing work per Joule (or per kW/h). They are often paired with a faster but less efficient "Performance" core, but there are also many SBCs, phones, and tablets out there with just quad-A53s. Those are the things Phoronix should have compared the VisionFive 2 to. The Raspberry Pi 3. Odroid C2 or C4. Rock64. [1] Arm's A510 went to triple-issue, but the A520 reverted to dual.

by snvzz 3y ago

mixmastamyk 3y ago

Bummer, has anyone told Mr. Larabel? Seems like this shouldn't be up in such detail if it is significantly wrong. Edit: There is some awareness: https://www.phoronix.com/forums/forum/phoronix/latest-phoronix-articles/1404009-starfive-visionfive-2-quad-core-risc-v-performance-benchmarks https://www.phoronix.com/forums/forum/phoronix/latest-phoron... Folks there say this chip config is intrinsically weaker and even optimization won't substantially help.

snvzz 3y ago
>Folks there say this chip config is intrinsically weaker and even optimization won't substantially help. The Sipeed Lichee Pi4a page has some performance graphs[0]. Their chip is a decent bump in performance, but notice how the JH7110, which they also included in their testing, does much better with a proper toolchain. This is in line with what VisionFive 2 owners (like me) have seen on their own boards. Nearly nobody uses the official image, because it really is that old and limited. 0. https://sipeed.com/licheepi4a https://sipeed.com/licheepi4a
- mixmastamyk 3y ago
  Nice, looks like a 30-40% bump.
brucehoult 3y ago
> Folks there say this chip config is intrinsically weaker and even optimization won't substantially help. The U74 does exactly what it was designed to do -- be a power-sipping dual-issue [1] in-order "efficiency" CPU, similar to Arm's A53 (2012), A55 (2017), A510 (2021), A520 (2023) series. Yes, Arm is still designing and shipping brand-new core designs similar to the U74. They have much faster cores as well, but efficiency cores are important and run the show in phones and tablets most of the time. This kind of core design is slower than wide Out-of-Order cores, but they use vastly less silicon area and achieve the most computing work per Joule (or per kW/h). They are often paired with a faster but less efficient "Performance" core, but there are also many SBCs, phones, and tablets out there with just quad-A53s. Those are the things Phoronix should have compared the VisionFive 2 to. The Raspberry Pi 3. Odroid C2 or C4. Rock64. [1] Arm's A510 went to triple-issue, but the A520 reverted to dual.