Arch Linux

Abhayadev S

Member

Registered: 2015-05-21

Posts: 1

initramfs too slow and ISR taking too much time !

On my SMP (2 core with 10siblings each) platform i have a PCIe deivce which is a video card which does DMA transfers to the application buffers.
This works fine with suse13.1 installed on a SSD drive.

When i took the whole image and created it as a initramfs and running from it (w/o any hdd) the whole system is very slow and i am seeing PCIe ISRs taking too much time and hecne the driver is failing !

any help on this is much appreciated.

there is a first initramfs iage which is the usual initrd the opensuse installs and i patched it to unpack the second initramfs (full rootfs of 1.8GB) in to RAM (32GB) as tmpfs and exec_init from it.

Last edited by Abhayadev S (2015-05-21 16:28:38)

Lone_Wolf

Administrator

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 15,171

Re: initramfs too slow and ISR taking too much time !

Abhayadev S,

Although your problem definitely looks very interesting, we can't help with issues with suse linux.
Or are you considering to test archlinux on that machine ?

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Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

clean chroot building not flexible enough ?
Try clean chroot manager by graysky