System hangs during intensive applications like Blender rendering

Forgive me, I'm by no means a Linux power user, and I'm brand new to Arch distros especially, so have patience if I say something stupid, but I'm trying to track down the cause/solution for a particular issue (Possibly one that has followed me through many various OS's)

I've found that my system will often hang if I run too much stuff. I get that Linux likes to do that in general, and I've been researching the right ways to avoid that. Swap partitions are setup correctly I believe.

But today for the first time, I've found a way to force the computer to hang on command, and I think it's related to the CPU, maybe the disk, but not RAM. If I open Blender, everything performs surprisingly well, until I begin a render. At that point, the Latte dock stops working. If I click any icon, it will not launch and the dock will become stuck in place. Often other programs will freeze as well. If htop was running in console, it will hang. If I run ps, it will list some processes and then hang in the middle of its output. Eventually Alacritty itself will completely hang. If I navigate around too much, program after program will stop responding until I can't navigate anywhere anymore. I'm not sure if it's permanent however. There were times when I assumed it was hosed and restarted, but I also tried leaving the renderer up, which did not seem to hang, and the moment the render completed, all hung programs caught back up.

That led me to think there was some sort of priority issue on the CPU, and that's where I struggle to find good resources/information online. I noticed htop listed blender with a nice value of -10 with only the pulseaudio process having a lower value. I tried changing the values, but blender kept resetting itself to -10, and setting Latte to -15 didn't seem to make any difference. In general I would expect even an intensive application to be forced by the kernel to leave at least a few cycles for the window manager and active application, since modern computers typically are designed to run more than one program at a time. But that's where my knowledge of Linux completely dries up.

I'm also not sure how to copy text from Alacritty, so I piped inxi -Faz to a text file and copied from there. I hope this is okay.

System:    Kernel: 5.11.15-148-tkg-bmq x86_64 bits: 64 compiler: gcc v: 10.2.0 
           parameters: intel_pstate=passive BOOT_IMAGE=/@/boot/vmlinuz-linux-tkg-bmq 
           root=UUID=662c36b3-f552-4932-b639-d05f01796fe2 rw [email protected] quiet splash rd.udev.log_priority=3 
           vt.global_cursor_default=0 systemd.unified_cgroup_hierarchy=1 loglevel=3 
           Desktop: KDE Plasma 5.21.4 tk: Qt 5.15.2 info: latte-dock wm: kwin_x11 vt: 2 dm: SDDM Distro: Garuda Linux 
           base: Arch Linux 
Machine:   Type: Desktop Mobo: Gigabyte model: EP45T-UD3P v: x.x serial: <filter> BIOS: Award v: F1 date: 10/13/2008 
CPU:       Info: Quad Core model: Intel Core2 Quad Q6600 bits: 64 type: MCP arch: Core Merom family: 6 model-id: F (15) 
           stepping: B (11) microcode: BA cache: L2: 4 MiB 
           flags: lm nx pae sse sse2 sse3 ssse3 vmx bogomips: 19219 
           Speed: 2136 MHz min/max: 1600/2400 MHz Core speeds (MHz): 1: 2136 2: 2227 3: 2200 4: 2315 
           Vulnerabilities: Type: itlb_multihit status: KVM: VMX disabled 
           Type: l1tf mitigation: PTE Inversion; VMX: EPT disabled 
           Type: mds status: Vulnerable: Clear CPU buffers attempted, no microcode; SMT disabled 
           Type: meltdown mitigation: PTI 
           Type: spec_store_bypass status: Vulnerable 
           Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer sanitization 
           Type: spectre_v2 mitigation: Full generic retpoline, STIBP: disabled, RSB filling 
           Type: srbds status: Not affected 
           Type: tsx_async_abort status: Not affected 
Graphics:  Device-1: AMD Pitcairn PRO [Radeon HD 7850 / R7 265 / R9 270 1024SP] vendor: XFX Pine driver: radeon v: kernel 
           alternate: amdgpu bus-ID: 01:00.0 chip-ID: 1002:6819 class-ID: 0300 
           Display: x11 server: X.Org 1.20.11 compositor: kwin_x11 driver: loaded: ati,radeon unloaded: modesetting 
           alternate: fbdev,vesa display-ID: :0 screens: 1 
           Screen-1: 0 s-res: 1920x1080 s-dpi: 96 s-size: 508x285mm (20.0x11.2") s-diag: 582mm (22.9") 
           Monitor-1: HDMI-0 res: 1920x1080 hz: 60 dpi: 96 size: 509x286mm (20.0x11.3") diag: 584mm (23") 
           OpenGL: renderer: AMD PITCAIRN (DRM 2.50.0 5.11.15-148-tkg-bmq LLVM 11.1.0) v: 4.5 Mesa 21.0.3 direct render: Yes 
Audio:     Device-1: Intel 82801JI HD Audio vendor: Gigabyte GA-EP45-DS5/GA-EG45M-DS2H driver: snd_hda_intel v: kernel 
           bus-ID: 00:1b.0 chip-ID: 8086:3a3e class-ID: 0403 
           Device-2: AMD Oland/Hainan/Cape Verde/Pitcairn HDMI Audio [Radeon HD 7000 Series] vendor: XFX Pine 
           driver: snd_hda_intel v: kernel bus-ID: 01:00.1 chip-ID: 1002:aab0 class-ID: 0403 
           Sound Server-1: ALSA v: k5.11.15-148-tkg-bmq running: yes 
           Sound Server-2: JACK v: 0.125.0 running: no 
           Sound Server-3: PulseAudio v: 14.2 running: yes 
           Sound Server-4: PipeWire v: 0.3.26 running: no 
Network:   Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet vendor: Gigabyte driver: r8169 v: kernel 
           port: b000 bus-ID: 04:00.0 chip-ID: 10ec:8168 class-ID: 0200 
           IF: enp4s0 state: up speed: 1000 Mbps duplex: full mac: <filter> 
           Device-2: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet vendor: Gigabyte driver: r8169 v: kernel 
           port: c000 bus-ID: 05:00.0 chip-ID: 10ec:8168 class-ID: 0200 
           IF: enp5s0 state: down mac: <filter> 
           Device-3: Broadcom BCM4306 802.11b/g Wireless LAN 
           vendor: Linksys WMP54GS v1.0 802.11g Wireless-G PCI with SpeedBooster driver: N/A modules: ssb, wl port: c000 
           bus-ID: 06:01.0 chip-ID: 14e4:4320 class-ID: 0280 
           Device-4: Edimax 802.11n NIC type: USB driver: N/A bus-ID: 2-1:2 chip-ID: 7392:a822 class-ID: 0000 serial: <filter> 
Drives:    Local Storage: total: 1.82 TiB used: 88.05 GiB (4.7%) 
           SMART Message: Unable to run smartctl. Root privileges required. 
           ID-1: /dev/sda maj-min: 8:0 vendor: Toshiba model: DT01ACA200 size: 1.82 TiB block-size: physical: 4096 B 
           logical: 512 B speed: 1.5 Gb/s rotation: 7200 rpm serial: <filter> rev: ABB0 scheme: MBR 
Partition: ID-1: / raw-size: 536.87 GiB size: 536.87 GiB (100.00%) used: 88.05 GiB (16.4%) fs: btrfs dev: /dev/sda3 
           maj-min: 8:3 
           ID-2: /home raw-size: 536.87 GiB size: 536.87 GiB (100.00%) used: 88.05 GiB (16.4%) fs: btrfs dev: /dev/sda3 
           maj-min: 8:3 
           ID-3: /var/log raw-size: 536.87 GiB size: 536.87 GiB (100.00%) used: 88.05 GiB (16.4%) fs: btrfs dev: /dev/sda3 
           maj-min: 8:3 
           ID-4: /var/tmp raw-size: 536.87 GiB size: 536.87 GiB (100.00%) used: 88.05 GiB (16.4%) fs: btrfs dev: /dev/sda3 
           maj-min: 8:3 
Swap:      Kernel: swappiness: 10 (default 60) cache-pressure: 75 (default 100) 
           ID-1: swap-1 type: zram size: 1.94 GiB used: 0 KiB (0.0%) priority: 32767 dev: /dev/zram0 
           ID-2: swap-2 type: zram size: 1.94 GiB used: 0 KiB (0.0%) priority: 32767 dev: /dev/zram1 
           ID-3: swap-3 type: zram size: 1.94 GiB used: 0 KiB (0.0%) priority: 32767 dev: /dev/zram2 
           ID-4: swap-4 type: zram size: 1.94 GiB used: 0 KiB (0.0%) priority: 32767 dev: /dev/zram3 
Sensors:   System Temperatures: cpu: 77.0 C mobo: N/A gpu: radeon temp: 59.0 C 
           Fan Speeds (RPM): N/A 
Info:      Processes: 246 Uptime: 1h 32m wakeups: 0 Memory: 7.77 GiB used: 3.41 GiB (43.8%) Init: systemd v: 248 
           tool: systemctl Compilers: gcc: 10.2.0 clang: 11.1.0 Packages: pacman: 2002 lib: 558 Shell: fish v: 3.2.1 
           running-in: alacritty inxi: 3.3.04 

You run very old, dated hardware. Try something newer than 2008, maybe?

3 Likes

can you try with a kernel like linux-lts ?

edit: check RAM usage, just in case with "vmstat -SM -w 5"

carefull with zram with the same size as the RAM.

The age alone is not, as you can see in both of us :slight_smile: @c00ter

I also have hardware from 2008 (i7 3770K OC) with a GTX 1060 that handles Blender quite well, but when rendering I can't do anything else but wait until Blender is done. Nothing more.
Video editing and rendering is GPU, CPU and RAM intensive.

With my new PC it's different, :slight_smile: but I don't want to brag :wink:

BTW,

:slight_smile:

2 Likes

I should have mentioned, the various OS's were also installed on various devices of varying ages, though never on any particularly robust equipment.

Although a new, possibly unrelated development happened last night. I left the computer idling, and woke up to find it hard locked (no mouse movement). Attempting to force a restart put it in a loop of booting and rebooting, and from what I could tell, it wasn't even completing a POST (It never got to the point of outputting any video). So perhaps you're right that the aging hardware could be a problem. After letting it sit a while, it finally did boot up, which makes me think there was a temperature problem or something. It was running a bit hot when I got back in, though I would expect it to shut down on its own if the temperature got too high, not wait for me to restart and then lock me out for a bit to cool down.

Though I have semi-recently run multiple thorough hardware tests on CPU, disk, and RAM, both within Garuda and via a bootable hardware test suite, and found no problems.

Here's vmstat. When it gets above 10 procs is when I was running a Blender render and the output hung for a bit, jsyk.

╰─λ vmstat -SM -w 5
--procs-- -----------------------memory---------------------- ---swap-- -----io---- -system-- --------cpu--------
   r    b         swpd         free         buff        cache   si   so    bi    bo   in   cs  us  sy  id  wa  st
   1    0            0         5444            6         1566    0    0   179    84  387  434   3   3  89   5   0
   0    0            0         5443            6         1566    0    0     0  1777  818  782   1   1  93   5   0
   0    0            0         5443            6         1566    0    0     0   771 1641 1882   1   7  91   1   0
   0    0            0         5444            6         1567    0    0     0    36  608  584   1   1  98   0   0
   0    0            0         5444            6         1566    0    0     0     0  617  588   1   1  98   0   0
   0    0            0         5442            6         1567    0    0     0    42  658  623   1   1  98   0   0
   0    0            0         5443            6         1566    0    0     0     0  549  539   1   1  98   0   0
   0    0            0         5443            6         1566    0    0     0     0 1592 1811   1   7  92   0   0
   1    0            0         5401            6         1569    0    0   127   650 1918 2261   6   2  90   2   0
   0    1            0         5148            6         1712    0    0 16038    89 4862 5090  13   7  60  20   0
   0    0            0         5053            6         1724    0    0  1118    18 3700 3416   8   4  81   7   0
   0    0            0         4944            6         1783    0    0  4434    57 5416 5972  10  13  74   3   0
   0    0            0         4946            6         1785    0    0    98     0 3134 3864   3   2  95   0   0
   2    0            0         4946            6         1785    0    0     0     0 2496 3079   2   2  96   0   0
   0    0            0         4946            6         1785    0    0    10  2421 2254 2632   2   2  95   2   0
   9    0            0         4848            6         1785    0    0    14    39 7727 5697  58   6  37   0   0
  10    0            0         4854            6         1785    0    0     0     0 8620 1947  99   1   0   0   0
  10    0            0         4852            6         1785    0    0     0   149 8666 1836  99   1   0   0   0
  10    0            0         4852            6         1785    0    0     0     0 8546 1660  99   1   0   0   0
  10    0            0         4849            6         1785    0    0     0     0 8567 1729  99   1   0   0   0
  10    0            0         4848            6         1785    0    0     0     0 8476 1721  99   1   0   0   0
  10    0            0         4848            6         1785    0    0    13  1647 8681 1956  99   1   0   0   0
  10    0            0         4847            6         1785    0    0     0     0 8504 1758  99   1   0   0   0
  10    0            0         4847            6         1785    0    0     0     0 8503 1831  99   1   0   0   0
  10    0            0         4847            6         1785    0    0     0     0 8506 1776  99   1   0   0   0
  10    0            0         4843            6         1785    0    0     0     0 8555 1802  99   1   0   0   0
  10    0            0         4843            6         1785    0    0     0     0 8497 1745  99   1   0   0   0
  10    0            0         4842            6         1785    0    0     0  2262 8493 1762  99   1   0   0   0
  10    0            0         4842            6         1785    0    0     0    70 8469 1750  99   1   0   0   0
  10    0            0         4841            6         1785    0    0     0    74 8539 1754  99   1   0   0   0
   2    0            0         4866            6         1785    0    0     0     0 8441 2667  92   7   1   0   0
   1    0            0         4887            6         1785    0    0     0     0 4657 3140  23  12  65   0   0
   0    0            0         4918            6         1785    0    0     0     0 2682 3400   3   2  95   0   0
   0    0            0         4921            6         1785    0    0     0     0 2300 2896   2   2  96   0   0
   6    0            0         4841            6         1785    0    0     0  1743 5020 4764  22   4  72   1   0
  12    0            0         4841            6         1785    0    0     0    72 11498 7485  97   3   0   0   0
  12    0            0         4837            6         1785    0    0     0    21 9548 3568  99   1   0   0   0
  12    0            0         4836            6         1785    0    0     0    74 8608 1910  99   1   0   0   0
  12    0            0         4834            6         1785    0    0     0     0 8604 1795  99   1   0   0   0
  12    0            0         4833            6         1785    0    0     0    42 8858 2282  99   1   0   0   0
  12    0            0         4833            6         1785    0    0     0  1555 9032 2621  99   1   0   0   0
  12    0            0         4829            6         1785    0    0     0    93 8586 1841  99   1   0   0   0
  12    0            0         4829            6         1785    0    0     0     5 8594 1764  99   1   0   0   0
  12    0            0         4828            6         1785    0    0     0    54 8533 1753  99   1   0   0   0
  12    0            0         4829            6         1785    0    0     0     0 8567 1716  99   1   0   0   0
  13    0            0         4829            6         1785    0    0     0     0 8471 1679  99   1   0   0   0
  12    0            0         4829            6         1785    0    0     0     0 8449 1755  99   1   0   0   0
--procs-- -----------------------memory---------------------- ---swap-- -----io---- -system-- --------cpu--------
   r    b         swpd         free         buff        cache   si   so    bi    bo   in   cs  us  sy  id  wa  st
  14    0            0         4830            6         1785    0    0     0  1770 8671 1835  99   1   0   0   0
  14    0            0         4830            6         1785    0    0     0   130 8530 1809  99   1   0   0   0
  14    0            0         4828            6         1785    0    0     0     0 8577 1824  99   1   0   0   0
  14    0            0         4828            6         1785    0    0     0     0 9245 1808  99   1   0   0   0
  14    0            0         4827            6         1785    0    0     0    46 10315 1775  99   1   0   0   0
  14    0            0         4827            6         1785    0    0     0     0 10940 1770  99   1   0   0   0
  15    0            0         4828            6         1785    0    0     0  1532 11643 1836  99   1   0   0   0
  15    0            0         4828            6         1785    0    0     0     0 11906 1766  99   1   0   0   0
  15    0            0         4826            6         1785    0    0     0    86 12135 1860  99   1   0   0   0
  15    0            0         4826            6         1785    0    0     0     0 11879 1759  99   1   0   0   0
  15    0            0         4824            6         1785    0    0     0     0 11459 1732  99   1   0   0   0
  15    0            0         4824            6         1785    0    0     0     0 10540 1762  99   1   0   0   0
  16    0            0         4825            6         1785    0    0     0  1474 10001 1838  99   1   0   0   0
  16    0            0         4825            6         1785    0    0     0     0 9613 1723  99   1   0   0   0
  16    0            0         4824            6         1785    0    0     0     0 9653 1736  99   1   0   0   0
  16    0            0         4824            6         1785    0    0     0  1645 9747 1863  99   1   0   0   0
  16    0            0         4824            6         1785    0    0     0    32 9710 1789  99   1   0   0   0
  16    0            0         4825            6         1785    0    0     0     0 9800 1709  99   1   0   0   0
  16    0            0         4824            6         1785    0    0     0    43 9981 1780  99   1   0   0   0
  16    0            0         4824            6         1785    0    0     0     0 10011 1724  99   1   0   0   0
  16    0            0         4822            6         1785    0    0     0     0 10075 1730  99   1   0   0   0
  16    0            0         4822            6         1785    0    0     0  1468 10089 1767  99   1   0   0   0
  16    0            0         4822            6         1785    0    0     0    53 10239 1785  99   1   0   0   0
  16    0            0         4821            6         1785    0    0     0     0 10241 1799  99   1   0   0   0
  17    0            0         4820            6         1785    0    0     0     0 10314 1881  99   1   0   0   0
  17    0            0         4821            6         1785    0    0     0     0 10181 1719  99   1   0   0   0
  17    0            0         4821            6         1785    0    0     0     0 10248 1700  99   1   0   0   0
  17    0            0         4820            6         1785    0    0     0  1474 10460 1821  99   1   0   0   0
  17    0            0         4820            6         1785    0    0     0     0 10379 1749  99   1   0   0   0
  18    0            0         4820            6         1785    0    0     0    62 10503 1835  99   1   0   0   0
  17    0            0         4819            6         1785    0    0     0    93 10544 1820  99   1   0   0   0
  17    0            0         4819            6         1785    0    0     0     0 10472 1658  99   1   0   0   0
  17    0            0         4819            6         1785    0    0     0    46 10488 1738  99   1   0   0   0
  17    0            0         4819            6         1785    0    0     0     0 10483 1679  99   1   0   0   0
  18    0            0         4819            6         1785    0    0     0  1558 10665 1919  99   1   0   0   0
  17    0            0         4819            6         1785    0    0     0    40 10518 1767  99   1   0   0   0
  17    0            0         4816            6         1785    0    0     0    32 10566 1749  99   1   0   0   0
  17    0            0         4815            6         1785    0    0     0    32 10604 1672  99   1   0   0   0
  17    0            0         4818            6         1785    0    0     0     0 10529 1734  99   1   0   0   0
  17    0            0         4816            6         1785    0    0     0    42 10701 1794  99   1   0   0   0
  10    0            0         4840            6         1785    0    0     0  1602 11030 3096  90  10   0   0   0
  11    0            0         4840            6         1785    0    0     0     0 10825 1788  99   1   0   0   0
  13    0            0         4840            6         1785    0    0     0     0 10848 1776  99   1   0   0   0
  13    0            0         4840            6         1785    0    0     0     0 10948 1769  99   1   0   0   0
  13    0            0         4839            6         1785    0    0     0     0 10792 1740  99   1   0   0   0
  13    0            0         4839            6         1785    0    0     0     0 10932 1709  99   1   0   0   0
  13    0            0         4841            6         1785    0    0     0  1478 11016 1828  99   1   0   0   0
--procs-- -----------------------memory---------------------- ---swap-- -----io---- -system-- --------cpu--------
   r    b         swpd         free         buff        cache   si   so    bi    bo   in   cs  us  sy  id  wa  st
  13    0            0         4840            6         1785    0    0     0     0 10881 1760  99   1   0   0   0
  13    0            0         4839            6         1785    0    0     0     0 10877 1827  99   1   0   0   0
  13    0            0         4839            6         1785    0    0     0     0 10867 1793  99   1   0   0   0
  13    0            0         4839            6         1785    0    0     0     0 10855 1728  99   1   0   0   0
  13    0            0         4840            6         1785    0    0     0     0 10758 1814  99   2   0   0   0
  14    0            0         4841            6         1785    0    0     0    52 10777 1787  99   1   0   0   0
  13    0            0         4840            6         1785    0    0     0  1506 10907 1781  98   2   0   0   0
  13    0            0         4840            6         1785    0    0     0     0 10695 1723  99   1   0   0   0
  13    0            0         4841            6         1785    0    0     0     0 10873 1799  99   1   0   0   0
  13    0            0         4840            6         1785    0    0     0    47 10835 1794  99   1   0   0   0
  13    0            0         4840            6         1785    0    0     0    39 10815 1794  99   1   0   0   0
  13    0            0         4839            6         1785    0    0     0    39 10913 1804  99   1   0   0   0
  13    0            0         4840            6         1785    0    0     0     0 10868 1790  99   1   0   0   0
  14    0            0         4840            6         1785    0    0     0   819 10944 1828  99   1   0   0   0
  14    0            0         4841            6         1785    0    0     0     0 10881 1783  99   1   0   0   0
  14    0            0         4841            6         1785    0    0     0     0 10827 1799  99   1   0   0   0
  14    0            0         4840            6         1785    0    0     0     0 10940 1662  99   1   0   0   0
  14    0            0         4840            6         1785    0    0     0     0 10944 1714  99   1   0   0   0
  14    0            0         4840            6         1785    0    0     0    39 11059 1752  99   1   0   0   0
  14    0            0         4840            6         1785    0    0     0     0 10949 1727  99   1   0   0   0
  14    0            0         4841            6         1785    0    0     0     0 11004 1712  99   1   0   0   0
  14    0            0         4841            6         1785    0    0     0     0 10817 1706  99   1   0   0   0
   3    0            0         4815            6         1786    0    0    17   644 11092 3944  85   8   7   0   0
   3    0            0         4814            6         1786    0    0     0   113 9762 2119  61  20  19   0   0
   0    0            0         4836            6         1786    0    0     0     0 6400 3681  29  17  54   0   0

Regardless of what petsam @SGS (or others may note), 2008 BIOS' were not made to handle modern hardware or modern operating system and application requirements. It should run 2008 operating systems very well, though.

Not unless one is extraordinarily lucky and has the right hardware.

Have you tried MX, Puppy, or any distributions more fitting of your hardware? What is your goal, exactly? To run any Linux, or only Garuda? Have you tried any of the Garuda WM (window manager) editions?

You can only make a silk purse from a sow's ear metaphysically.

EDITED

1 Like

Thanks for the welcome, and for the tips about Alacritty/searching!

So if you are seeing the same issue on your end, would you say there's not really a way in software to force it to at least devote some processing power to keeping the UI alive while other intensive processes are ongoing?

Mainly my interest is in having some Linux OS available to me (and every time I have one, it seems to die on me, but maybe that's because I always use cheap/old hardware), and I have this computer otherwise going unused, so I figured I'd use it. I suppose it doesn't have to be running Dragonized Garuda, but that was what I was most interested in getting accustomed to.

I am more familiar with OS's like Windows, where old hardware tends to slow you down, but not completely shut you out. But if that's not how it works in this case, then I suppose I might try a WM edition or something else (as a last resort).

You can set in Blender that not all processors are used for rendering.

There is also no error, because after rendering, with me, everything ran normally again.
Your system is simply too weak.

CPU:       Info: Quad Core model: Intel Core2 Quad Q6600 bits: 64 type: MCP arch: Core Merom family: 6 model-id: F (15) 
           stepping: B (11) microcode: BA cache: L2: 4 MiB 
           flags: lm nx pae sse sse2 sse3 ssse3 vmx bogomips: 19219 
           Speed: 2136 MHz min/max: 1600/2400 MHz Core speeds (MHz): 1: 2136 2: 2227 3: 2200 4: 2315 

Memory: 7.77 GiB used: 3.41 GiB (43.8%)

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Repurposing an older computer is an admirable pursuit, and I understand your wish to install and run Dr460nized KDE. KDE, of itself, is pretty bland (check out Barebones), but the look and feel of Dr460nized can be mostly emulated in their Window Manager editions.

They'll still be hardware intensive, considering your hardware's age, but worth a try.

EDIT: The idea with a WM being to get the OS' demands on your existing hardware out of the way, thereby leaving as much resources available for your applications as possible.

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That's a shame. Still a little confusing to me that there's no software solution for adapting to weak hardware, but limiting the CPU core usage for Blender does fix the issue for that particular application, so that's very helpful itself.

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Thank you for your advice! I'll consider those options.

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well it seems you are OK with ram :slight_smile:

yeah ,follow @SGS 's advice, its a good one. Don't use all your cores. that way your system wont hang and you can still "kinda work" :slight_smile:

This just sounds like the render required a lot of RAM, and that pushed ZRAM into action with a lot of CPU use to compress pages. This shows ZRAM works - because your system didn't freeze totally, as it would with RAM exhaustion - but also that you probably need more RAM.

The other option is overheating. Rendering is processor intensive and so will generate a lot of heat, especially so if you're using the GPU to assist.

This is a really old kernel version - is there a reason you haven't updated recently?

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I thought that was a 2012 CPU? :thinking:

:stuck_out_tongue_winking_eye:

that was my suspicion as well, but according to vmstat , swap isn't even touched !

It looks like zswap isn't exposed via vmstat; there's a patch from 19th August awaiting review though:

https://www.spinics.net/lists/linux-mm/msg268181.html

Edit: I'm getting confused between zswap and zram (again). The above is still true, just irrelevant here.

I would quiet like to see the blend file he is trying to render with a Intel Core2 Quad as so many factors are involved?
ie. volumetric's
partical physic,
as they all use the cpu, memory and gpu in different ways.

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it is.... i only have swap through zram, and it shows the swap

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