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Questions tagged [memory]

Memory refers to the SDRAM (a kind of RAM) found on the Raspberry Pi.

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34 views

Raspberry Pi crashing while running VGG16

I need to run VGG16 as a convolutional base for feature extraction on some images. I am trying to initialize it on the Raspberry Pi 3B, but the Pi keeps crashing and restarting. I suspect that the Pi ...
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Has anyone used spidev library with python 3?

I am currently trying to interface a RPI 3B+ with a flash memory chip using SPI communication. do anyone have a good resource for using SPI communication with memory? What language should I use. I ...
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2answers
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What is the correct way to use /dev/gpiomem with mmap to get access to Raspberry PI3 peripherals

I'm implementing a pascal library to deal with RPI3 peripherals. My goal is to control GPIO pins' functions, pins' logical levels, pins' pull resistors, I2C and PWM, at least. To achieve this I'm ...
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1answer
39 views

How to find the memory requirement (RAM) when network load is know on raspberry

I am want to use the Raspberry Pi for my experimental work. My network load will be approximately 2000bits. How I can find the memory (RAM) requirement against the network load? Which formula can be ...
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116 views

Pi 3 Model B+ can't boot after changing vRAM

I just got the device (Pi 3 Model B+) and am a total beginner. I'm using NOOB/Raspbian. Every time I try to change the video ram (either through the GUI or the config.txt) the device is unable to ...
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2answers
999 views

Raspberry Pi with flash memory?

Basically, I am looking for some form of non-volatile memory – which is not an SD card. Orange Pi and others have it, but I can’t find a suitable Raspberry Pi. Did I miss one? Are there any rumours ...
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46 views

All files lost during long shelf time

i was using my raspberry pi 3 over ssh and doing a bunch of scripts, cron jobs, etc. then i stopped for a bit and shifted my focus elsewhere and my pi remained unplugged on my desk for a few months. ...
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Is it possible to use a DDR2 Ram Chip on the PI as a pager file?

simple, I have a few old DDR2 RAM chips laying around, and would like to use the Ram chips for a pager file on my PI. is this possible?
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1answer
45 views

Computing power and memory for regression analysis

Does raspberry pi 3 have enough computing power and memory to perform regression analysis?I am making a Coordinate measuring machine prototype for my final year project and I need to perform linear ...
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1answer
322 views

How to compile project on Raspberry Pi, even when g++'s virtual memory exhausted despide big SWAP?

I want to build Iroha hyperledger on Raspberry Pi 3. So I've downloaded code and all dependencies and compiler gcc-8.2 (downloaded precompiled from here), then configured without tests: cmake -...
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2answers
113 views

What is the memory in the DS3232 RTC for?

I'm looking for an RTC to use with my Pi and came across the Maxim DS3231M. I also saw a similar model on Maxim's website, the DS3232M, which comes with 236 bytes of SRAM. The DS3231 seems to be a ...
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1answer
385 views

memory exhausted: can not allocate memory error in raspberry pi

I am trying to turn my raspberry to a PiCroft. For that I need to use these commands: cd ~/ git clone https://github.com/MycroftAI/mycroft-core.git cd mycroft-core bash dev_setup.sh I did nothing ...
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1answer
70 views

Accessing GPU memory content

I'm currently working with advanced picamera parameters. A new functionnality to come is the "lens shading correction", a RGGB array that modify the image generated by the camera in order to ...
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2answers
10k views

How to permanently disable swap on Raspbian Stretch Lite

I'm at my wit's end; it seems there's no way to tell Raspbian Stretch Lite to permanently disable swap space. Now, it's a bit of an edge case, wanting to keep swap turned off (in this case it's for a ...
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How do I set the default maximum Java heap size? [closed]

I want to set the default Java heap size to 1024m without needing to specify the -Xmx option every time I run a jar file. Tried adding export JAVA_OPTIONS=-Xmx1024m to .bashrc file but it didn't ...
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1answer
297 views

Creating Swapfiles

I have a Pi3 hooked up with a WDLabs PiDrive I have Raspbian Lite installed on the drive and in trying to run some docker images simultaneously some of the images processes are being "killed" with a ...
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1answer
49 views

Will linking the clock file to an in-memory file lower the wear on the SD card?

I use systemd-timesyncd, which writes a status (probably) to a file at every synchronization. As the Arch documentation mentions, The service writes to a local file /var/lib/systemd/clock with ...
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1answer
675 views

Zram appears not to be working

I use very little of my Raspberry Pi 2B's CPU, but I frequently need more memory. In order to free up memory on my Pi running Ubuntu MATE, I set up Zram by installing zram-config. I was pleasantly ...
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1answer
98 views

Turn Raspberry Pi off but keep the RAM powered?

Is it possible to turn almost everything on a Raspberry Pi off (CPU GPU etc), except for the ram? Basically putting the Pi in a low power state but preserving whatever it was doing at the moment on ...
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1answer
4k views

Unable to set GPU memory split on Raspberry Pi Zero W

I have looked everywhere (both on and off StackExchange) for this but cannot get an answer: I have a Raspberry Pi Zero W, which has 512MB of RAM total. I am running it headless, so I want to ...
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1answer
694 views

How can I install keybase (and dependencies) without running out of memory?

I have a Raspberry Pi 3 running the most recent Raspbian distro. I've installed the most recent go, from the prebuilt package and have it on my path: $ go version go version go1.9 linux/arm However,...
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3answers
165 views

Hardware and OS Options for Quick Dev/Test Cycles on the Model A

I have a Rasperry Pi 1 Model A. I want to use it on a hobby project that will require me to have lots of dev/test cycles where I: Write some code in a higher-level language (Scala; but could be ...
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1answer
617 views

Kernel panic - not syncing : out of memory and no killable processes when booting after setting GPU memory to 256 MB in raspi-config

I tried booting in recovery mode (holding down shift from a USB keyboard attached to the Pi2) and still can't boot to fix. Any solutions? Thanks
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How to force GPU memory to 0 on a headless server [duplicate]

Is there any way to force the shared memory to 0? I'm running Jessie on a pi3 (and a pi2 and a few zero-w's) as a headless server and only ever access it via SSH or a WebUI for certain services. I ...
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1answer
7k views

More Memory on Raspberry Pi

So I was wondering if there was any way to allow more ram to a program on a Raspberry Pi 3. I have a process which takes 76,7% of the memory (it's a tomcat server) and need another one like this to ...
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309 views

How can I set video memory to max when using vc4-kms-v3d?

According to Anholt, the creator of the opensource kernel device tree overlay at Broadcom, the maximum is 256M. How do I set this? gpu_mem=256 in /boot/config.txt is not the correct why I think. ...
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1answer
1k views

Extra 16M memory on Pi2/Pi3

My 1 GiB RAM Pi shows this: >vcgencmd get_mem gpu gpu=128M >vcgencmd get_mem arm arm=880M The former is specified in /boot/config.txt, but the total here is only 1008 MiB. What happened to ...
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1answer
668 views

Memory Limit of Python3 in Raspberry 3

We are running an python application which needs ~2400MB (on Windows). Our Raspberry Pi 3 has a 4GB swap and runs on 164MB RAM idle. So from our point of view python should be able to use 4GB on the ...
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1answer
105 views

How to partition 32G SD card with 6 sda# drives to max memory usage - Raspberry / Ubuntu

I am only a beginner at Linux-OS's so take this into consideration when you answer this question. I have noticed that my 32G SD card is partitioned into two sda# drives but I need to max out this ...
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0answers
59 views

Result of a C++ bit shifting operation

This is related to a previous post, viz., C++ cout output on RPi 3B This code snippet, #define GPIO_SET *(gpio.addr + 7) struct bcm2835_peripheral { unsigned long addr_p; int mem_fd; ...
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1answer
669 views

C++ cout output on RPi 3B

I have these lines in a C++ program on a RPi 3B: struct bcm2835_peripheral { unsigned long addr_p; int mem_fd; void *map; volatile unsigned int *addr; }; struct bcm2835_peripheral ...
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1answer
608 views

Transferring 16gb microSD to 64gb

I made a backup of the 16gb microSD card (installed with NOOBS) for a Raspberry Pi 3 and saved it to my Mac using: sudo dd if=/dev/disk2 of=~/Desktop/raspberrypi.dmg Then, I took a 64gb microSD card,...
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3answers
9k views

Raspberry Pi 3 has less than 1GB memory available at OS level

I don't know if it is a critical issue or not. But, I need to get rid of the question marks in my mind. I recently purchased a Raspberry Pi 3 board and while I was playing with it, I realized that ...
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1answer
1k views

regarding how to measure memory usage on raspberry pi for a specific program [closed]

I am beginner and I am looking for some help for measuring how much memory a specific program is taking to complete its execution? Is there any article or built in functions I need to start with.
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1answer
1k views

EEPROM Raspberry pi HAT read

I'm currently designing a Raspberry pi HAT. A HAT need to have an eeprom memory on it with several information. This memory is read at boot time of the Raspberry pi. My question is the following: ...
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1answer
70 views

Are Rpi1B 256MB / Rpi1B512 interchangeable using *the same* SD/card (Raspbian)?

My web"nozing" told me that the two (the Rpi1B 256 and 512) variants are virtually the same hardware spec-wise (with the exception of the amount of RAM ofc. and maybe the SMT/cirquit layout). Could I ...
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1answer
19k views

Raspberry PI 3 Increase Gpu Memory to 944 [closed]

I use Raspberry PI 3 and wnat to get more GPU memory to work. I overclock my PI to get more performance because I use it for home Apache/PHP/MySQL server, Access Point and somethimes play music and ...
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0answers
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Traditional swap file rather than dphys-swapfile?

I have a RPI-3 with the ARMv8 Broadcom SoC. I needed to create a swap file because I was running out of memory on occasion. I used a traditional swap file in a separate partition because the dphys-...
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2answers
208 views

Can I have one raspberry pi access the memory of another pi?

Long story short, I am building a sensor that uses 2 pi's and each of them have a camera attached to it. I would like 1 pi to record and store the video and the other pi to access that video to ...
2
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1answer
116 views

Arguments for execl compiling with gcc [closed]

I have a weird problem with a Raspberry Pi 2 (model b). I'm compiling the following program in GCC in Raspbian Jessie (Linux raspberrypi 4.4.11-v7+ #888 SMP Mon May 23 20:10:33 BST 2016 armv7l GNU/...
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873 views

Remote restart after -bash: fork: Cannot allocate memory

I am running Raspbian on a Raspberry Pi which is located in a remote location. I use Putty to connect to it via SSH. I can connect fine but when I try to run any command I get the following: -bash:...
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1answer
418 views

Largest micro sd card

What is the largest micro sd card that the Raspberry Pi 3 can handle? I have a 64 gb card that works flawlessly, but would like to try something larger.
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3answers
6k views

Why do I have so many RAM disks?

I have Arch Linux running on my Raspberry Pi 2. Right after install, I ran lsblk, fdisk and df commands (unfortunately I did not save the output) but I had one disk, which is the SD card and two ...
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1answer
335 views

What does libcofi do?

This answer rather vaguely states "libcofi-rpi.so is a hack to speed up certain memory operations." Apart from the fact that the file is called libcofi_rpi.so on my machine, what exactly is libcofi ? ...
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3answers
4k views

Raspberry pi class 4 vs raspbery pi 2 class 10

I currently have the previous raspberry pi class 4 card. I'm considering getting the new raspberry pi model 2 class 10 card. Is there a speed difference between the two cards?
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3answers
1k views

Is 8gb enough to support Ubuntu MATE without storage issues?

After becoming familiar with Rasbian and Terminal, I decided to try something new with ubuntu MATE. Aside from the microSD card that the Raspberry pi came with, which I want to keep the Rasbian ...
3
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1answer
4k views

Can't install O/S from NOOBS

Preformatted 8GB micro SD card opens screen to install Raspbian, data partition, or boot from Scratch, but says I have 0 MB of 2762 MB needed, and offers no options to proceed. Where do I go from ...
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1answer
10k views

Freeing up cache when memory is low

I have my raspberry pi A+ in my embeeded project and every byte of memory is important when I've only got 128 MB to my CPU (I need 128 MB for the GPU because I use the camera module). Unfortunently ...
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1answer
308 views

Minimum gpu_mem on π2

The documentation claims, 16 MiB is the lower limit for the gpu memory size. When I set it to less than 32 MiB, start.elf won't run successfully. Everything I get is a repetitive four times blinking ...
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0answers
325 views

Segmentation fault caused by libmysqlclient.so or libcofi_rpi.so

Was getting a segmentation fault in a program that has traditionally run fine on most flavors of linux. Running ADB revealed that this seems to be caused by libmysqlclient.so using memcpy incorrectly, ...