On Mon, Nov 10, 2014 at 02:49:39AM +0100, Luigi Rizzo wrote:
It was noticed that there is huge dev_lock() contention when multiple
processes do a poll() even on independent file descriptors.
Turns out that not just poll but most syscalls on file descriptors
(as opposed to sockets) in
On Mon, Nov 10, 2014 at 10:34:57AM +0200, Konstantin Belousov wrote:
On Mon, Nov 10, 2014 at 02:49:39AM +0100, Luigi Rizzo wrote:
It was noticed that there is huge dev_lock() contention when multiple
processes do a poll() even on independent file descriptors.
Turns out that not just poll
On Mon, Nov 10, 2014 at 10:44:12AM +0100, Luigi Rizzo wrote:
On Mon, Nov 10, 2014 at 10:34:57AM +0200, Konstantin Belousov wrote:
On Mon, Nov 10, 2014 at 02:49:39AM +0100, Luigi Rizzo wrote:
It was noticed that there is huge dev_lock() contention when multiple
processes do a poll() even
It was noticed that there is huge dev_lock() contention when multiple
processes do a poll() even on independent file descriptors.
Turns out that not just poll but most syscalls on file descriptors
(as opposed to sockets) in sys/fs/devfs/devfs_vnops.c including
devfs_poll_f(), devfs_ioctl_f() and
