Rusty Russell 38bc2b8c56 lguest: implement deferred interrupts in example Launcher ... Rather than sending an interrupt on every buffer, we only send an interrupt when we're about to wait for the Guest to send us a new one. The console input and network input still send interrupts manually, but the block device, network and console output queues can simply rely on this logic to send interrupts to the Guest at the right time. The patch is cluttered by moving trigger_irq() higher in the code. In practice, two factors make this optimization less interesting: (1) we often only get one input at a time, even for networking, (2) triggering an interrupt rapidly tends to get coalesced anyway. Before: Secs RxIRQS TxIRQs 1G TCP Guest->Host: 3.72 32784 32771 1M normal pings: 99 1000004 995541 100,000 1k pings (-l 120): 5 49510 49058 After: 1G TCP Guest->Host: 3.69 32809 32769 1M normal pings: 99 1000004 996196 100,000 1k pings (-l 120): 5 52435 52361 (Note the interrupt count on 100k pings goes *up*: see next patch). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>		2009-06-12 22:27:11 +09:30
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.gitignore	lguest: tell git to ignore Documentation/lguest/lguest	2009-04-19 23:14:02 +09:30
extract	lguest: documentation I: Preparation	2007-07-26 11:35:16 -07:00
lguest.c	lguest: implement deferred interrupts in example Launcher	2009-06-12 22:27:11 +09:30
lguest.txt	lguest: PAE support	2009-06-12 22:27:08 +09:30
Makefile	lguest: clean up example launcher compile flags.	2009-06-12 22:27:03 +09:30