Re: 2.6.37: Multi-second I/O latency while untarring

2011-03-28 Thread Andrew Lutomirski
On Mon, Feb 14, 2011 at 10:22 AM, Chris Mason wrote: > Excerpts from Andrew Lutomirski's message of 2011-02-11 19:35:02 -0500: >> On Fri, Feb 11, 2011 at 10:44 AM, Chris Mason wrote: >> > >> > We can tell more if you post the full traces from latencytop.  I have a >> > patch here for latencytop

Re: 2.6.37: Multi-second I/O latency while untarring

2011-02-14 Thread Chris Mason
Excerpts from Andrew Lutomirski's message of 2011-02-11 19:35:02 -0500: > On Fri, Feb 11, 2011 at 10:44 AM, Chris Mason wrote: > > Excerpts from Andrew Lutomirski's message of 2011-02-11 10:08:52 -0500: > >> As I type this, I have an ssh process running that's dumping data into > >> a fifo at high

Re: 2.6.37: Multi-second I/O latency while untarring

2011-02-11 Thread Andrew Lutomirski
On Fri, Feb 11, 2011 at 10:44 AM, Chris Mason wrote: > Excerpts from Andrew Lutomirski's message of 2011-02-11 10:08:52 -0500: >> As I type this, I have an ssh process running that's dumping data into >> a fifo at high speed (maybe 500Mbps) and a tar process that's >> untarring from the same fifo

Re: 2.6.37: Multi-second I/O latency while untarring

2011-02-11 Thread Andrew Lutomirski
On Fri, Feb 11, 2011 at 10:44 AM, Chris Mason wrote: > Excerpts from Andrew Lutomirski's message of 2011-02-11 10:08:52 -0500: >> As I type this, I have an ssh process running that's dumping data into >> a fifo at high speed (maybe 500Mbps) and a tar process that's >> untarring from the same fifo

Re: 2.6.37: Multi-second I/O latency while untarring

2011-02-11 Thread Matt
On Fri, Feb 11, 2011 at 3:08 PM, Andrew Lutomirski wrote: > As I type this, I have an ssh process running that's dumping data into > a fifo at high speed (maybe 500Mbps) and a tar process that's > untarring from the same fifo onto btrfs.  The btrfs fs is mounted -o > space_cache,compress.  This ma

Re: 2.6.37: Multi-second I/O latency while untarring

2011-02-11 Thread Chris Mason
Excerpts from Andrew Lutomirski's message of 2011-02-11 10:08:52 -0500: > As I type this, I have an ssh process running that's dumping data into > a fifo at high speed (maybe 500Mbps) and a tar process that's > untarring from the same fifo onto btrfs. The btrfs fs is mounted -o > space_cache,compr

2.6.37: Multi-second I/O latency while untarring

2011-02-11 Thread Andrew Lutomirski
As I type this, I have an ssh process running that's dumping data into a fifo at high speed (maybe 500Mbps) and a tar process that's untarring from the same fifo onto btrfs. The btrfs fs is mounted -o space_cache,compress. This machine has 8GB ram, 8 logical cores, and a fast (i7-2600) CPU, so it