1. 17 6月, 2009 18 次提交
  2. 16 6月, 2009 5 次提交
  3. 15 6月, 2009 1 次提交
  4. 13 6月, 2009 13 次提交
  5. 12 6月, 2009 3 次提交
    • M
      lguest: add support for indirect ring entries · d1f0132e
      Mark McLoughlin 提交于
      Support the VIRTIO_RING_F_INDIRECT_DESC feature.
      
      This is a simple matter of changing the descriptor walking
      code to operate on a struct vring_desc* and supplying it
      with an indirect table if detected.
      Signed-off-by: NMark McLoughlin <markmc@redhat.com>
      Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
      d1f0132e
    • R
      lguest: suppress notifications in example Launcher · b60da13f
      Rusty Russell 提交于
      The Guest only really needs to tell us about activity when we're going
      to listen to the eventfd: normally, we don't want to know.
      
      So if there are no available buffers, turn on notifications, re-check,
      then wait for the Guest to notify us via the eventfd, then turn
      notifications off again.
      
      There's enough else going on that the differences are in the noise.
      
      Before:				Secs	RxKicks	TxKicks
       1G TCP Guest->Host:		3.94	  4686	  32815
       1M normal pings:		104	142862	1000010
       1M 1k pings (-l 120):		57	142026	1000007
      
      After:
       1G TCP Guest->Host:		3.76	  4691	  32811
       1M normal pings:		111	142859	 997467
       1M 1k pings (-l 120):		55	 19648	 501549
      Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
      b60da13f
    • R
      lguest: try to batch interrupts on network receive · 4a8962e2
      Rusty Russell 提交于
      Rather than triggering an interrupt every time, we only trigger an
      interrupt when there are no more incoming packets (or the recv queue
      is full).
      
      However, the overhead of doing the select to figure this out is
      measurable: 1M pings goes from 98 to 104 seconds, and 1G Guest->Host
      TCP goes from 3.69 to 3.94 seconds.  It's close to the noise though.
      
      I tested various timeouts, including reducing it as the number of
      pending packets increased, timing a 1 gigabyte TCP send from Guest ->
      Host and Host -> Guest (GSO disabled, to increase packet rate).
      
      // time tcpblast -o -s 65536 -c 16k 192.168.2.1:9999 > /dev/null
      
      Timeout		Guest->Host	Pkts/irq	Host->Guest	Pkts/irq
      Before		11.3s		1.0		6.3s		1.0
      0		11.7s		1.0		6.6s		23.5
      1		17.1s		8.8		8.6s		26.0
      1/pending	13.4s		1.9		6.6s		23.8
      2/pending	13.6s		2.8		6.6s		24.1
      5/pending	14.1s		5.0		6.6s		24.4
      Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
      4a8962e2