Total ram vu+ uno se 4k

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    • Total ram vu+ uno se 4k

      Hello

      Why total amount of RAM on the vu+ uno se 4k model is 732 MB and 500 mb is free befor install plugin , skin But the manufacturer announces the amount of 2 GB RAM ?? :?: :?:
    • That is normal on platforms which are using linux operating system.
      linux uses normally the free memory dynamically for buffering data of mass storage etc.

      Dieser Beitrag wurde bereits 1 mal editiert, zuletzt von anudanan ()

    • I think @linux22 means something slightly different; available memory of the box is partionend by the boot loader. The linux system itself doesn't have access to all installed memory, part of the memory is used internally. For what purposes: I don't know.

      Look at the boot messages in /var/log/messages.
      Diskutiere nie mit einem Idioten. Er zieht dich auf sein Niveau runter und schlägt dich mit seiner Erfahrung.
    • I think, the question is not related to the RAM being used as I/O buffer.
      In fact, I'm afraid, that in the question some things are mixed up...

      You must understand the difference between Flash and RAM.

      Flash is persistent storage like an SD card. The flash filesystem is the system storage, on which the operating system and the plugins are located.
      On the Uno 4k SE the available filesystem size is 3.5 GB. You can check, how much if you flash filesystem is used, you can use the command df -h / command on the command line:

      Quellcode

      1. root@uno4kse:~# df -h /
      2. Filesystem Size Used Available Use% Mounted on
      3. /dev/root 3.5G 656.9M 2.6G 19% /
      On my Uno 4k SE 19% of the flash are used for the operating system, the enigma software and all plugins.
      When I install additional plugins, this will increase the usage.

      RAM is something completely different. RAM is the memory, which is used for the current running processes.
      How much rum is in usage, you can find out using the free command:

      Quellcode

      1. root@uno4kse:~# free
      2. total used free shared buff/cache available
      3. Mem: 724840 120936 494904 528 109000 581992
      4. Swap: 0 0 0

      The total available RAM is approx 720 MByte.
      As @anudanan already explained, the Linux system uses all available RAM as I/O buffer.
      In the output of the free command you can see the amount used as buffer in the "buff/cache" column.
      When you copy big files or play recordings, the RAM almost entirely will be used as "buff/cache".
      However, the buffer can be freed quickly when needed. Because of this, it is considered as "available".
      As you can see in my output, "available" is the sum of "free" and "buf/cache".

      The total RAM in the box actually is 2 GB. The system can use approx. 720 MB of this RAM.
      The rest is used for "RAM disks". These are filesystems residing in the RAM, kind of "virtual disks".
      They are used for log files and all other files, which are only needed in the current processes and can be deleted at system shutdown. The RAM disks you can see as filesystem using the df command:

      Quellcode

      1. root@uno4kse:~# df -h |grep tmpfs
      2. devtmpfs 345.8M 0 345.8M 0% /dev
      3. tmpfs 353.9M 424.0K 353.5M 0% /run
      4. tmpfs 353.9M 104.0K 353.8M 0% /var/volatile

      Dieser Beitrag wurde bereits 1 mal editiert, zuletzt von RickX ()

    • sorry for the german screenshot.

      press the yellow button on the remote control and then you should see the 2GB memory.
      Bilder
      • 1_0_19_132F_3EF_1_C00000_0_0_0_20220120150805.jpg

        252,17 kB, 1.920×1.080, 40 mal angesehen
    • Wow, nearly 1GByte for drivercode?
      interesting.

      I´m right that driver (Treiber) means also code for linux kernel and all included driver code?

      Dieser Beitrag wurde bereits 1 mal editiert, zuletzt von anudanan ()

    • I think the "TREIBER" figure contains the TMPFS RAM disk space...

      Looking at the screenshot, I think
      • USERLAND is the RAM, which is available in the running System, this is the "total" from the free command.
      • TREIBER contains the RAM disk space
      To find out, if the system has enough RAM or if it is running out of RAM, is the "available" column from the free command. This value unfortunately is not shown in the VTi Info screen at all...

      In the forum you can find lots of questions from people, who see the FREE value beeing very small. This, however, is normal in Linux. The screen is a bit misleading. Instead of FREI it better would show VERFÜGBAR, i.e. "available".

      Dieser Beitrag wurde bereits 1 mal editiert, zuletzt von RickX ()

    • @Rick
      Hello
      This means that now the free amount of RAM space is 500 MB installing a few picons and a limited number of skins, I have about 200 MB of free RAM space. That is, what happens if this free space is also filled?
      Will some amount of total ram be released to the user again so that the receiver speed does not slow down?? :?: ?(

      Dieser Beitrag wurde bereits 2 mal editiert, zuletzt von linux22 ()

    • My guess: users knew their boxes should be equipped with 2 GB of memory, but didn't see that in top/free/proc/memory ...
      plnick "fixed" that with the "TREIBER" line.

      Here's the output from Solo4k dmesg where you can actually see, that part of the memory gets "reserved" in the boot process:

      Quellcode

      1. [ 0.000000] bmem: Reserved 633 MiB at 0x0000000018300000
      2. [ 0.000000] bmem: Reserved 499 MiB at 0x00000000a0d00000
      3. [ 0.000000] cma: Reserved 16 MiB at 0x000000000f000000
      4. ...
      5. [ 0.000000] Memory: 892100K/2097152K available (5849K kernel code, 320K rwdata, 1904K rodata, 248K init, 184K bss, 1188668K reserved, 16384K cma-reserved, 671744K highmem)
      6. [ 0.000000] Virtual kernel memory layout:
      7. vector : 0xffff0000 - 0xffff1000 ( 4 kB)
      8. fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB)
      9. vmalloc : 0xd0800000 - 0xff000000 ( 744 MB)
      10. lowmem : 0xc0000000 - 0xd0000000 ( 256 MB)
      11. pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB)
      12. modules : 0xbf000000 - 0xbfe00000 ( 14 MB)
      13. .text : 0xc0008000 - 0xc079a800 (7754 kB)
      14. .init : 0xc079b000 - 0xc07d92c0 ( 249 kB)
      15. .data : 0xc07da000 - 0xc082a218 ( 321 kB)
      16. .bss : 0xc082a220 - 0xc085861c ( 185 kB)
      Alles anzeigen

      This wasn't always the case for the Solo4k, with earlier images we had the full 2 GB available for the Linux system.

      @linux22 it seems you are confusing flash memory with RAM
      Diskutiere nie mit einem Idioten. Er zieht dich auf sein Niveau runter und schlägt dich mit seiner Erfahrung.

      Dieser Beitrag wurde bereits 2 mal editiert, zuletzt von rdamas ()

    • Do not vu + or all Linux receivers support larger than 2 GB RAM?

      Is building virtual RAM also effective in increasing speed?

      Dieser Beitrag wurde bereits 1 mal editiert, zuletzt von linux22 ()

    • Fully agreed.

      And just in case you don't believe us: create a swap file preferrably on a fast SSD, activate it, and watch it not being used.

      There are lots of "tutorials" out there on how to do so.
      Diskutiere nie mit einem Idioten. Er zieht dich auf sein Niveau runter und schlägt dich mit seiner Erfahrung.
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    • I explained that in #4 in detail:


      RickX schrieb:

      How much RAM is in usage, you can find out using the free command:

      Quellcode

      1. root@uno4kse:~# free
      2. total used free shared buff/cache available
      3. Mem: 724840 120936 494904 528 109000 581992
      4. Swap: 0 0 0
      The FREE column shows the amount of RAM which is free.

      "FREE" must not be mixed up with "AVAILABLE".
      In case more RAM is required, it can release RAM from the AVAILABLE part, which usually is in use for BUFF/CACHE.

      The operating system always keeps a small amount completely free, so that it can use it, when RAM is needed quickly.
      In the system the there is a configuration which sets the limit for free RAM which should not be used for RAM/CACHE.


      In you case this limit is 16,5 MB.

      You're still investigating the RAM usage of your box... It is absolutely normal Linux memory handling.
      You should probably explain what your real problem is...

      Dieser Beitrag wurde bereits 1 mal editiert, zuletzt von RickX ()