Raspberry Pi Forums

bstrobl

It would also in theory allow for deactivation of a large portion of the VPU blob (about 1/3rd of start.elf). What are the other two thirds used for? I assume all the decode logic along with the rtos takes a decent chunk. Also, is an open source blob without the hardware decoders possible? I believ...

bstrobl

The Raspberry Pi repo is used to build the kernel shipped with rpi-update and Raspbian. The Raspberry Pi downstream kernel contains drivers and features not found in the upstream kernel. Things like the heavily modified USB driver, Videocore GPU (vchiq) driver and a few other bits and pieces are no...

bstrobl

The shared armv6 and armv7 kernel is pretty interesting, not sure if it includes the hard float bit for the 2835 though. If it does it would free up a couple megs of space on future sd card images

bstrobl

The upstream Kernel is still missing a 3d driver. Should pop up in 4.5 though, leaving only a couple bits and the firmware blob as the last bastion of closed source code on the Pi. http://elinux.org/RPi_Upstreaming Might take a while longer before the upstream kernel is actually used, since the new ...

bstrobl

The Pi 2 is roughly equal in performance to a Pentium 4: http://www.phoronix.com/scan.php?page=article&item=ubuntu_pentium4_old&num=1 Is serving 20,000 users possible? All of it depends on how you build your website and how it gets used. 20,000 requests per second is probably not going to happen eve...

bstrobl

Pi 2: # Uptime | System Boot up ----------------------------+--------------------------------------------------- 1 135 days, 03:30:18 | Linux 3.18.11-v7+ Fri May 8 10:46:16 2015 2 54 days, 21:12:36 | Linux 4.1.7-v7+ Sun Oct 4 15:54:57 2015 -> 3 32 days, 04:52:33 | Linux 4.1.13-v7+ Sun Nov 29 15:40:1...

bstrobl

We already have that... I think it's called "Jessie". For that matter maybe close to describing Jessie Lite too. I don't think it's a good idea forcing people even further down the bloat boat route by building it in. What happens when a few months go by and everything is outdated and unusable. If a...

bstrobl

I think the current system is an excellent compromise. Current Pis if handled well can probably last decades, compared to most flash memory which will wear out if given enough time. What would actually be kind of neat is an operating system installed in some embedded ROM on the SoC with a very basic...

bstrobl

Hi, since I have a corrupted filesystem on my micro SD, which I can not really trace to its cause, I have gotten little bit more in to the matter of what is the best SD card. I have found out, that the original intention of a SD card is not to be written onto it 24/7. There are some cards which sup...

bstrobl

"You can pretty much apply the same to all future 2835 Pi's of whatever design, and most people do overclock to 1Ghz completely safely." So what has changed so this only applies the future 2835s? Exactly this. How can the zero's 1GHz config.txt work on all zeros, but may work or not on your existin...

bstrobl

There's no such thing as "better binning" - the process is just binning (aka sorting in some production environments) and then you can _select_ the "better" parts. Fair enough. No, you're talking about the bottom of the SoC for CSI and DSI connections - I'm talking about the top of the SoC where th...

bstrobl

It's your turn to calculate the exact clock they used in turbo mode. Try it, no garantee … and … please … let your zero alive. michael Thanks for that, turbo should be around 1.2 GHz then. Might get a Zero to sand off the cpu and see if I can produce a die shot of the chip. The low price justifies ...

bstrobl

I can put this one to bed: the BCM2835 hasn't changed between Pis. Can you tell us what has allowed you to raise the baseline speed to 1GHz? Or are you keeping this quiet to announce a future speed upgrade for the B+ and A+ :lol: . Has anyone who owns a Zero also checked the config file to see if t...

bstrobl

The memory split seems to be set at 0, which means the GPU by default claims 64MiB of RAM. Setting it to 16 gives back 48MiB of RAM for those who need it.

Thanks for all the work put into it!

bstrobl

When you say "better binned", what exactly do you mean (sorry, I speak the "stuperior" version of English :lol: ). Do you mean better actually made, or the top of the standard yield (the expensive "vintage", or perhaps "bintage", in this case? :))? They wouldn't be able to toss the 80% (or whatever...

bstrobl

In case anyone missed it: Regards the 1Ghz speed, that is actually the maximum the ARM11 was designed for: https://en.wikipedia.org/wiki/ARM11 Not quite true, arm11 was designed to surpass 1 Ghz on a 100nm or better process. Nothing stops a chip architecture from going faster other than the constra...

bstrobl

It's pretty clear no one has gotten my drift on what my unpublished speculation would be, and that's actually making this more fun. I will say this, don't think about why the BCM-2835 was apparently (and it may have just been a package change, mind you) slightly downsized, and I'm assuming to fit t...

bstrobl

This definitely has awesome potential once USB type-C becomes ubiquitous. Right now the additions of adapters for basic desktop computing tasks make it a bit more clunky than it would originally appear. Embedded users will have a great time with it though, since they can skip the disadvantages of th...

bstrobl

Free precut cardboard to make your own case

bstrobl

I think people are underestimating the huge cost involved in developing 'new' chps. Even the 2836 cost multiple millions $ to develop, and that was a simple cut and shut. The Foundation simply don't sell enough boards to make it worth developing to the sort of levels being requested. You can see fr...

bstrobl

It wouldn't have been a relatively cheap cut and shut then would it. It would have been a major project and we would probably still be waiting for the Pi2 now. The question is if it would have made sense to integrate it at the time at a higher initial cost and reap the future benefits by reducing i...

bstrobl

Agreed. There is still a lot of good stuff in the VC4 that is still very relevant to day - 1080p30 decode/encode is still the main use case for video. The camera works fine, the 3D graphics are still pretty powerful (not many people use them to the full extent even now) Upgrading the CPU's in anoth...

bstrobl

Coincidentally, just been doing some H265 testing - it is WAY better than H264 for complex scenes at low bitrates. Shame about the horrendous patent issues. The IETF working group for a royalty free codec (netvc) is making good progress however. A codec capable of rivalling or even exceeding H.265 ...

bstrobl

Broadcom made most of the GPU team redundant, so there isn't further development. However, the graphics part of VC5 was completed and was even put in another chip, so improved 3D performance might be possible in a future chip. However, better encoding (eg H265) or camera ISP would be a lot more pro...

bstrobl

Can I use rpi-update to get to Kernel 4.2? AFAIK, no. The Kernel needs to be patched with Raspberry Pi specific drivers and patches as these have not been mainlined into the Kernel codebase. The current RPi Kernel is 4.1, which also happens to be an LTS Kernel (Long Term Support), i.e. it gets crit...

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