similar to: [PATCH] virtio_net tx performance fix

Signed-off-by: Dor Laor <dor.laor at qumranet.com> --- hack-module.awk | 28 +++++++++++++++++++++++++++- 1 files changed, 27 insertions(+), 1 deletions(-) diff --git a/hack-module.awk b/hack-module.awk index 580090b..bd63fb9 100644 --- a/hack-module.awk +++ b/hack-module.awk @@ -45,8 +45,8 @@ print " return 1;"; print " }"; print ""; -

Now that we have a host timer based tx wakeup it waits for 64 packets or timeout before processing them. This might cause the guest to run out of tx buffers while the host holds them up. This is a temporal solution to quickly bring back performance to 800mbps. But a better fix will soon be sent (its not the only problem). Signed-off-by: Dor Laor <dor.laor@qumranet.com> ---

Now that we have a host timer based tx wakeup it waits for 64 packets or timeout before processing them. This might cause the guest to run out of tx buffers while the host holds them up. This is a temporal solution to quickly bring back performance to 800mbps. But a better fix will soon be sent (its not the only problem). Signed-off-by: Dor Laor <dor.laor@qumranet.com> ---

commit 763769621d271d92204ed27552d75448587c1ac0 Author: Dor Laor <dor.laor@qumranet.com> Date: Wed Dec 12 14:52:00 2007 +0200 [virtio-net][PATCH] Don't arm tx hrtimer with a constant 50us each transmit The current start_xmit sets 500us hrtimer to kick the host. The problem is that if another xmit happens before the timer was fired then the first xmit will have to

commit 763769621d271d92204ed27552d75448587c1ac0 Author: Dor Laor <dor.laor@qumranet.com> Date: Wed Dec 12 14:52:00 2007 +0200 [virtio-net][PATCH] Don't arm tx hrtimer with a constant 50us each transmit The current start_xmit sets 500us hrtimer to kick the host. The problem is that if another xmit happens before the timer was fired then the first xmit will have to

From 9f5a551d7e2a00eb019b158f8f3130e8176ec27c Mon Sep 17 00:00:00 2001 From: Dor Laor <dor.laor@qumranet.com> Date: Mon, 17 Dec 2007 01:40:15 +0200 Subject: [PATCH] Update all status fields on driver unload Both VIRTIO_CONFIG_S_DRIVER and VIRTIO_CONFIG_S_DRIVER_OK should be cleaned upon driver unload. Signed-off-by: Dor Laor <dor.laor@qumranet.com> --- drivers/virtio/virtio.c | 3

From 9f5a551d7e2a00eb019b158f8f3130e8176ec27c Mon Sep 17 00:00:00 2001 From: Dor Laor <dor.laor@qumranet.com> Date: Mon, 17 Dec 2007 01:40:15 +0200 Subject: [PATCH] Update all status fields on driver unload Both VIRTIO_CONFIG_S_DRIVER and VIRTIO_CONFIG_S_DRIVER_OK should be cleaned upon driver unload. Signed-off-by: Dor Laor <dor.laor@qumranet.com> --- drivers/virtio/virtio.c | 3

From 20a01e0c24f47e9805a88bebc9310163f99b5e99 Mon Sep 17 00:00:00 2001 From: Dor Laor <dor.laor@qumranet.com> Date: Sun, 16 Dec 2007 23:35:35 +0200 Subject: [PATCH] Handle module unload Add the device release function. Signed-off-by: Dor Laor <dor.laor@qumranet.com> --- drivers/virtio/virtio.c | 7 +++++++ drivers/virtio/virtio_pci.c | 7 +++++++ 2 files changed, 14

From 20a01e0c24f47e9805a88bebc9310163f99b5e99 Mon Sep 17 00:00:00 2001 From: Dor Laor <dor.laor@qumranet.com> Date: Sun, 16 Dec 2007 23:35:35 +0200 Subject: [PATCH] Handle module unload Add the device release function. Signed-off-by: Dor Laor <dor.laor@qumranet.com> --- drivers/virtio/virtio.c | 7 +++++++ drivers/virtio/virtio_pci.c | 7 +++++++ 2 files changed, 14

From bf5361f9b8b00f85e93cddf853f8f7f449c8d8c2 Mon Sep 17 00:00:00 2001 From: Dor Laor <dor.laor@qumranet.com> Date: Sun, 9 Dec 2007 12:17:36 +0200 Subject: [PATCH] Add NIC vendor option to kvm python script It allows picking other NIC vendors than rtl8139. Use --nictype=xxx, the ddefault is rtl8139. Signed-off-by: Dor Laor <dor.laor@qumranet.com> --- kvm | 8 +++++++- 1 files

From bf5361f9b8b00f85e93cddf853f8f7f449c8d8c2 Mon Sep 17 00:00:00 2001 From: Dor Laor <dor.laor@qumranet.com> Date: Sun, 9 Dec 2007 12:17:36 +0200 Subject: [PATCH] Add NIC vendor option to kvm python script It allows picking other NIC vendors than rtl8139. Use --nictype=xxx, the ddefault is rtl8139. Signed-off-by: Dor Laor <dor.laor@qumranet.com> --- kvm | 8 +++++++- 1 files

From 7354db58f496b06369e57d9be87e9c84db087690 Mon Sep 17 00:00:00 2001 From: Dor Laor <dor.laor@qumranet.com> Date: Wed, 12 Dec 2007 14:52:00 +0200 Subject: [PATCH] Don't arm tx hrtimer with a constant 500us each transmit The current start_xmit sets 500us hrtimer to kick the host. The problem is that if another xmit happens before the timer was fired then the first xmit will have to

From 7354db58f496b06369e57d9be87e9c84db087690 Mon Sep 17 00:00:00 2001 From: Dor Laor <dor.laor@qumranet.com> Date: Wed, 12 Dec 2007 14:52:00 +0200 Subject: [PATCH] Don't arm tx hrtimer with a constant 500us each transmit The current start_xmit sets 500us hrtimer to kick the host. The problem is that if another xmit happens before the timer was fired then the first xmit will have to

Rusty, Anthony, Dor, I need your brain power :-) On smp guests I have seen a problem with virtio (the version in curent Avi's git) which do not occur on single processor guests: kernel BUG at /space/kvm/drivers/virtio/virtio_ring.c:228! illegal operation: 0001 [#1] Modules linked in: ipv6 CPU: 2 Not tainted Process swapper (pid: 0, task: 000000000f83e038, ksp: 000000000f877d70) Krnl

Rusty, Anthony, Dor, I need your brain power :-) On smp guests I have seen a problem with virtio (the version in curent Avi's git) which do not occur on single processor guests: kernel BUG at /space/kvm/drivers/virtio/virtio_ring.c:228! illegal operation: 0001 [#1] Modules linked in: ipv6 CPU: 2 Not tainted Process swapper (pid: 0, task: 000000000f83e038, ksp: 000000000f877d70) Krnl

From 4780a4792ca7776268107e200ae77003c36d55c9 Mon Sep 17 00:00:00 2001 From: Dor Laor <dor.laor@qumranet.com> Date: Wed, 19 Dec 2007 23:52:43 +0200 Subject: [PATCH] virtio block device This patch implements the backend support for the virtio block device. It's designed to support in-order queueing of a virtually unlimited size so it will be able to perform better than SCSI. Besides

From 4780a4792ca7776268107e200ae77003c36d55c9 Mon Sep 17 00:00:00 2001 From: Dor Laor <dor.laor@qumranet.com> Date: Wed, 19 Dec 2007 23:52:43 +0200 Subject: [PATCH] virtio block device This patch implements the backend support for the virtio block device. It's designed to support in-order queueing of a virtually unlimited size so it will be able to perform better than SCSI. Besides

From 83e942e0c7634121243478fa2f4e3459b33d4a67 Mon Sep 17 00:00:00 2001 From: Dor Laor <dor.laor@qumranet.com> Date: Wed, 19 Dec 2007 23:43:24 +0200 Subject: [PATCH] virtio network device This patch implements the backend support for the virtio network device. The device is optimized for virtualized environments by limiting the number of guest=>host transitions per-packet. In the best

From 83e942e0c7634121243478fa2f4e3459b33d4a67 Mon Sep 17 00:00:00 2001 From: Dor Laor <dor.laor@qumranet.com> Date: Wed, 19 Dec 2007 23:43:24 +0200 Subject: [PATCH] virtio network device This patch implements the backend support for the virtio network device. The device is optimized for virtualized environments by limiting the number of guest=>host transitions per-packet. In the best

From f244bcad756c4f761627557bb7f315b1d8f22fb2 Mon Sep 17 00:00:00 2001 From: Dor Laor <dor.laor@qumranet.com> Date: Thu, 20 Dec 2007 13:26:30 +0200 Subject: [PATCH] [VIRTIO-NET] Rx performance improvement The current performance are not good enough, the problem lies in qemu tap handling code that caused to pass packets one at a time and also to copy them to a temporal buffer. This patch