EXT4/Btrfs/XFS/F2FS Benchmarks On Linux 3.17

[a user]

why are all btrfs benchmarks here using mount option space_cache?
as far as i know this is a very bad idea on ssd, not only regarding their life time but it also should'nt yield any performance gain on them if not even make things slower.

[geearf]

why are all btrfs benchmarks here using mount option space_cache?
as far as i know this is a very bad idea on ssd, not only regarding their life time but it also should'nt yield any performance gain on them if not even make things slower.

I am curious, why would space_cache be bad for an ssd performance?

[kenjitamura]

I also use nouveau with my GTX 770, as I don't play games under Linux and couldn't get the Nvidia driver to stop tearing under KDE.

You tried going into the Nvidia X Server Settings and changing the PowerMizer "Preferred Mode" settings from "auto" to "Prefer Maximum Performance"?

Only thing that severely reduces/eliminates tearing for me with my GT 640. It's a night and day difference in tearing for me just changing that one setting when I watch videos in VLC or SMPlayer. It's a longstanding problem with the Nvidia blob, I'm using driver version 340.24.

[magika]

It's a longstanding problem with the Nvidia blob, I'm using driver version 340.24.

Honestly, I have no idea where you guys get tearing with blob, I've been using multiple cards from 8800 to 670 and never got any unexpected tearing with the blob. Maybe someone needs "X: Drivers and Compositing 101"?

[mike4]

My Asus GTX770 on Ubuntu/Unity is in a recent test about 18% faster with x-plane than on Win8.1 or OSX.
Needless to say that it also looks as good.

[nanonyme]

Honestly, I have no idea where you guys get tearing with blob, I've been using multiple cards from 8800 to 670 and never got any unexpected tearing with the blob. Maybe someone needs "X: Drivers and Compositing 101"?

There's been a lot of debate on this and iirc it resulted mainly in that whether or not you get tearing is based on luck with regards to GPU etc and whether your eyes just happen to pick it up

[Michael]

why are all btrfs benchmarks here using mount option space_cache?
as far as i know this is a very bad idea on ssd, not only regarding their life time but it also should'nt yield any performance gain on them if not even make things slower.

Stock mount options were used for each file-system.

[DrYak]

I ordered a new study laptop which will be only running arch, would you recommend ext4 or btrfs for it? I would go for ext4 since I wont be using encryption or compression on btrfs. Or does btrfs have any other features that might be potentially useful to me?

- snapshots!
keep track of modifications, history, etc.
can be useful for system mount (do snapshot before/after upgrades. Some systems like suse even do it automatically)
can be useful for home mount to be able to quickly go back in time (a cron entry that periodically makes snapshot and keep the latest N hourly/daily/weekly snapshots)

- send/receive!
very easily store snapshots on a remote server for backup purpose.
(Think about it: classical implementation relying on rsync will need to re-read all the data and checksum it, and then compare sub-parts of non-matching files... slow.
Whereas: btrfs already keeps hashes for all data, and due to the way COW works, already know what's the difference between the current head and the last snapshot. Sending only the modifications comes for free !)

I demand a PTS benchmark profile for porn watching and facebook checking.

I second that.

[kenjitamura]

Honestly, I have no idea where you guys get tearing with blob, I've been using multiple cards from 8800 to 670 and never got any unexpected tearing with the blob. Maybe someone needs "X: Drivers and Compositing 101"?

Thank you for the limited anecdotal evidence you've provided that somehow encompasses every DE and hardware combination known to linux and properly shows every Nvidia driver tearing bug report on the internet as just being user incompetence. Now excuse me while I go print your response off on some toilet paper and use it to wipe my ass.

[kenjitamura]

Thank you for the limited anecdotal evidence you've provided that somehow encompasses every DE and hardware combination known to linux and properly shows every Nvidia driver tearing bug report on the internet as just being user incompetence. ****************************************

Seems I've gone over the "edit timer" for this site >.<

Ignore this whole post as I just get really bitchy after staying up all night and into 5 in the morning.