Questions tagged [memory]

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

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Why does OOM killer output not appear in dmesg?

I've got a Buster box (10.2) and I'm investigating some system freezes. While going through that, I think I'm not getting the OOM output in the syslog. For instance, running tail /dev/zero which is ...
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Running x86 Windows app on a Raspberry Pi 3B

I followed this guide to install QEMU in a chroot and I'm able to execute x86 Linux binaries: https://stackoverflow.com/questions/51895452/qemu-debian-x86-on-raspberrypi Next, I tried installing WINE ...
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Python process Memory error

I am running a Python program that is scrapping data so whenever I try to retrieve too much data (I have not been able to scrape files up to 16 MB) the programme crashes. The error: INFO: Got 45294 ...
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74 views

How to write protect in DS2431 Maxim EEPROM using Raspberry Pi

I have connected my circuit as mentioned in the below link: Writing/Reading an EEPROM chip using 1-wire bus I am able to read and write through commands mentioned in the link. I would like to know ...
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RPI3B+ Chromium Freeze - RAM Swap

I have some Raspberry pi's that I want to use it as a Browser Kiosk. When I use more than one tab with chromium the pi completely freeze I need to reboot it after this because the lack of ram, if I ...
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RPi Memory map and bus addresses

I'm trying to understand the RPi memory map as shown in the BCM2857 reference (http://www.raspberrypi.org/wp-content/uploads/2012/02/BCM2835-ARM-Peripherals.pdf) Is a "Bus Address" the same as a ...
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1answer
27 views

Should I avoid using WP with some sort of visual composer when hosting on my Rapberry Pi 4? Is there a better and equally easy approach?

I've been told a WP-install can easily consume 2 Gigs of memory when editing in visual composers in WP. When my Pi only has 4 GB available and on top on that I'm running MariaDB (NOT Nginx), then ...
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Virtual register address translation on the raspberry Pi 4

When taking a look at the manual of the BCM2835 (which seems to be the correct one for the BCM2711), we can see, for example, that the base address of the SPI device is 0x7E204000 (page 152). Assume ...
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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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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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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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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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2k 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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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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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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420 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
162 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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474 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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88 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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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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342 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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57 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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777 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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114 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
5k 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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872 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
166 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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709 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
8k 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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329 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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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
795 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
121 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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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
723 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
719 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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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
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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
21k 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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2k views

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
215 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 ...
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1answer
129 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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1k 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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432 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.