Sorry, my reply was non sequitur to this thread. We don't do merging in NVMe. Our first bottleneck appears to be the device mapper's single lock request queue. > -----Original Message----- > From: Jens Axboe [mailto:axboe@xxxxxxxxx] > Sent: Wednesday, February 25, 2015 8:12 AM > To: Busch, Keith; Mike Snitzer > Cc: jmoyer@xxxxxxxxxx; dm-devel@xxxxxxxxxx; shivakrishna.merla@xxxxxxxxxx; Bart Van Assche > Subject: Re: awful request merge results while simulating high IOPS multipath > > On 02/24/2015 08:14 PM, Keith Busch wrote: > > To be honest, we also see underwhelming performance on high IOPS PCIe > > SSDs. We know of some bottlenecks and ideas to test, but hoping to work > > out the kinks in those ideas before Vault in two weeks. > > Related to merging, or? > > -- > Jens Axboe -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
