On Wed, 2017-01-11 at 17:22 +0100, Hannes Reinecke wrote: > On 01/11/2017 05:12 PM, hch@xxxxxxxxxxxxx wrote: > > On Wed, Jan 11, 2017 at 04:08:31PM +0000, Bart Van Assche wrote: > > > A typical Ethernet network adapter delays the generation of an > > > interrupt > > > after it has received a packet. A typical block device or HBA does not > > > delay > > > the generation of an interrupt that reports an I/O completion. > > > > NVMe allows for configurable interrupt coalescing, as do a few modern > > SCSI HBAs. > > Essentially every modern SCSI HBA does interrupt coalescing; otherwise > the queuing interface won't work efficiently. Hello Hannes, The first e-mail in this e-mail thread referred to measurements against a block device for which interrupt coalescing was not enabled. I think that the measurements have to be repeated against a block device for which interrupt coalescing is enabled. Bart.-- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
