4 ms·
dmidecode -t memory (Not that the kernel printing it hurts, but at the same time, you're not going to read it real time, it flies past the screen too fast. So
by b112 2y ago
dmidecode -t memory
(Not that the kernel printing it hurts, but at the same time, you're not going to read it real time, it flies past the screen too fast. So either way it's dmesg or dmidecode...)
- mschuster91 2y agoIt will at least also show up in a serial console, which can be buffered by the remote terminal.
- bayindirh 2y ago> it flies past the screen too fast. So either way it's dmesg or dmidecode... You won't believe how finicky server GPUs can be. One of our servers can update the screen so slow during booting, not only you can read everything line by line, that 30 second boot takes more than 2 minutes because of it.
- _flux 2y agoMaybe it also writes to (network) serial console? Though I suppose maybe some graphics-mode consoles can still be slow. I'm not sure if there's much point using them, though, if there is never a graphical interface running.
- bayindirh 2y agoNope, I'm sure. I install them. It's the normal boot console. Just KMS changes the resolution during the boot. It's very useful for reading long log lines if the server needs close attention for any reason.
- _flux 2y ago[In Linux] You can use 132 character wide text modes as well, so if the boot slowness disturbs you, you could if they work in your system. (Actually also 160 wide, but I wonder if they are as commonly supported..) In addition there's the netconsole, but I guess sometimes the network interface can be down.
- bayindirh 2y agoThanks for the info. Actually it doesn't. We seldom reboot our servers. We use the lights-out infrastructure provided by servers if needed (the BMC thingy).
- toast0 2y agoIPMI serial console has its own buffer, it doesn't usually do flow control all the way to the other side. I have seen serial console slow things down when configured for flow control on the wrong port though. As well as saving a significant portion of boot up time by reducing logging to vga on servers with particularly slow cards (helped everywhere, but we had a new batch of severs that were much slower than the old ones... too long ago for me to remember details though)
- CoastalCoder 2y agoJust curious: what GPU model is it?
- bayindirh 2y agoIIRC, ServerEngines/Matrox G200e.
- BobbyTables2 2y agoUnaccelerated framebuffer can horribly slow, scrolling is actually painful when done memory copies.
- elzbardico 2y agoYes, but then for use this, you need the boot to have completed succesfuly. So, it is of no help to you if you want this information to figure out why the boot is crashing.
- nubinetwork 2y agoMost modern UEFI BIOSes also show which sticks are installed in each slot.
- bravetraveler 2y agoHeck, even older pre-EFI systems. You could get clues by which read SPD
- gizmo686 2y agoThis is what serial ports are for.