I don't have a lot experience with autodefrag, but as indicated by Austin, expect a lot of full rewrites of files that are relatively slowly filled up by a torrent client, starting with a sparse file. So 1st advice would be to remove this option and run it as crontask at particular times. What SATA-USB bridge is between the harddisk and the PC motherboard ? Also what USB host chipset is on the PC motherboard ? Why don't you run 64-bit Ubuntu on this core i7 ? On Tue, Oct 27, 2015 at 12:44 PM, Austin S Hemmelgarn <ahferroin7@xxxxxxxxx> wrote: > On 2015-10-26 22:00, cheater00 . wrote: >> >> Hello, >> currently my computer freezes every several seconds for half a second >> or so. Using it feels like I'm playing musical chairs with the kernel. >> I have just one download happening on utorrent right now - this is >> what the graph looks like: >> http://i.imgur.com/LqhMtrJ.png >> and every time a new spike happens, a freeze happens just before >> that... that's the only time those freezes happen, too. >> > Do you have the 'autodefrag' mount option enabled? If it is turned on, then > that may be the problem. Most bittorrent clients pre-allocate the space for > a download, then write each block directly into the location it's supposed > to be in the resultant download, which means depending on how it's > pre-allocating the space, that you end up with a large number of randomly > ordered writes into a single file, which in turn will trigger the autodefrag > code, which can cause latency spikes when you're also hitting the disk at > the same time. > -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
