On Tue, 26 Mar 2013, Sašo Kiselkov wrote:
Once I gave it bit more thought, I realized tmpfs *should* be faster, since it doesn't traverse the block device/SCSI interface and instead intercepts calls pretty high up the VFS stack. Nonetheless, I suspect the tmpfs implementation isn't really designed for multi-GB/s throughput (it's a filesystem for /tmp FFS, it's supposed to hold a couple of kB of data anyway).
Sašo, you are continuing to ignore that the simple dd to tmpfs test turned in abysmal results on this quad Xeon E5 system as compared to the many other systems tested.
This seems to be a problem with the system, or the way Illumos runs on it.
I had not heard of Illumos running on a quad Xeon E5 system before now. It is doubtful that Illumos has been seriously tweaked/tuned for particular newer hardware since the days of Sun. Most efforts seem on the level of keeping things running properly without the considerable resources required for performance tuning/testing. Maybe there are significant issues to be resolved.
Bob -- Bob Friesenhahn [email protected], http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ ------------------------------------------- illumos-discuss Archives: https://www.listbox.com/member/archive/182180/=now RSS Feed: https://www.listbox.com/member/archive/rss/182180/21175430-2e6923be Modify Your Subscription: https://www.listbox.com/member/?member_id=21175430&id_secret=21175430-6a77cda4 Powered by Listbox: http://www.listbox.com
