From: Peter Xu <peterx@redhat.com>
To: "Eugenio Pérez" <eperezma@redhat.com>
Cc: "Peter Maydell" <peter.maydell@linaro.org>,
"Aleksandar Rikalo" <aleksandar.rikalo@syrmia.com>,
"Yan Zhao" <yan.y.zhao@intel.com>,
"Eduardo Habkost" <ehabkost@redhat.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
"Jason Wang" <jasowang@redhat.com>,
"Juan Quintela" <quintela@redhat.com>,
"Hervé Poussineau" <hpoussin@reactos.org>,
qemu-devel@nongnu.org, "Eric Auger" <eric.auger@redhat.com>,
qemu-arm@nongnu.org, qemu-ppc@nongnu.org,
"Avi Kivity" <avi@redhat.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"David Gibson" <david@gibson.dropbear.id.au>,
"Richard Henderson" <rth@twiddle.net>
Subject: Re: [PATCH 4/5] intel_iommu: Skip page walking on device iotlb invalidations
Date: Fri, 4 Sep 2020 14:32:10 -0400 [thread overview]
Message-ID: <20200904183210.GA148776@xz-x1> (raw)
In-Reply-To: <20200903161446.29615-5-eperezma@redhat.com>
On Thu, Sep 03, 2020 at 06:14:45PM +0200, Eugenio Pérez wrote:
> Although they didn't reach the notifier because of the filtering in
> memory_region_notify_iommu_one, the vt-d was still splitting huge
> memory invalidations in chunks. Skipping it.
>
> This improves performance in case of netperf with vhost-net:
> * TCP_STREAM: From 1923.6Mbit/s to 2175.13Mbit/s (13%)
> * TCP_RR: From 8464.73 trans/s to 8932.703333 trans/s (5.5%)
> * UDP_RR: From 8562.08 trans/s to 9005.62/s (5.1%)
> * UDP_STREAM: No change observed (insignificant 0.1% improvement)
>
> Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
--
Peter Xu
next prev parent reply other threads:[~2020-09-04 18:33 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-25 19:16 [RFC 0/1] memory: Delete assertion in memory_region_unregister_iommu_notifier Eugenio Pérez
2020-06-25 19:16 ` [RFC 1/1] " Eugenio Pérez
2020-06-25 19:29 ` [RFC 0/1] " no-reply
2020-08-26 14:36 ` [RFC v6 00/13] " Eugenio Pérez
2020-08-26 14:36 ` [RFC v6 01/13] memory: Rename memory_region_notify_one to memory_region_notify_iommu_one Eugenio Pérez
2020-08-26 14:36 ` [RFC v6 02/13] memory: Add IOMMUTLBNotificationType to IOMMUTLBEntry Eugenio Pérez
2020-08-26 15:42 ` Peter Xu
2020-08-27 6:11 ` Eugenio Perez Martin
2020-08-26 14:36 ` [RFC v6 03/13] hw/alpha/typhoon: Mark all IOMMUTLBEntry as IOMMU_IOTLB_NONE type Eugenio Pérez
2020-08-26 15:50 ` Peter Xu
2020-08-26 14:36 ` [RFC v6 04/13] amd_iommu: " Eugenio Pérez
2020-08-26 14:36 ` [RFC v6 05/13] hw/arm/smmu: Fill IOMMUTLBEntry notifier type Eugenio Pérez
2020-08-26 14:36 ` [RFC v6 06/13] dma/rc4030: Mark all IOMMUTLBEntry as IOMMU_IOTLB_NONE type Eugenio Pérez
2020-08-26 14:36 ` [RFC v6 07/13] intel_iommu: Mark IOMMUTLBEntry of page notification as IOMMU_IOTLB_UNMAP type Eugenio Pérez
2020-08-26 14:36 ` [RFC v6 08/13] virtio-iommu: Mark virtio_iommu_translate IOTLB as IOMMU_IOTLB_NONE type Eugenio Pérez
2020-08-26 14:36 ` [RFC v6 09/13] intel_iommu: Set IOMMUTLBEntry type in vtd_page_walk_level Eugenio Pérez
2020-08-26 14:36 ` [RFC v6 10/13] memory: Notify IOMMU IOTLB based on entry type, not permissions Eugenio Pérez
2020-08-26 14:36 ` [RFC v6 11/13] memory: Add IOMMU_DEVIOTLB_UNMAP IOMMUTLBNotificationType Eugenio Pérez
2020-08-26 14:36 ` [RFC v6 12/13] intel_iommu: Do not notify regular iotlb to device-iotlb notifiers Eugenio Pérez
2020-08-26 16:51 ` 罗勇刚(Yonggang Luo)
2020-08-27 6:56 ` Eugenio Perez Martin
2020-08-26 14:36 ` [RFC v6 13/13] memory: Skip bad range assertion if notifier is DEVIOTLB type Eugenio Pérez
2020-08-26 15:00 ` [RFC v6 00/13] memory: Delete assertion in memory_region_unregister_iommu_notifier Eugenio Perez Martin
2020-08-26 15:54 ` Peter Xu
2020-08-27 6:53 ` Eugenio Perez Martin
2020-09-03 16:14 ` [PATCH 0/5] memory: Skip " Eugenio Pérez
2020-09-03 16:14 ` [PATCH 1/5] memory: Rename memory_region_notify_one to memory_region_notify_iommu_one Eugenio Pérez
2020-09-03 16:14 ` [PATCH 2/5] memory: Add IOMMUTLBEvent Eugenio Pérez
2020-09-03 16:14 ` [PATCH 3/5] memory: Add IOMMU_NOTIFIER_DEVIOTLB_UNMAP IOMMUTLBNotificationType Eugenio Pérez
2020-09-03 16:14 ` [PATCH 4/5] intel_iommu: Skip page walking on device iotlb invalidations Eugenio Pérez
2020-09-04 18:32 ` Peter Xu [this message]
2020-09-03 16:14 ` [PATCH 5/5] memory: Skip bad range assertion if notifier is DEVIOTLB_UNMAP type Eugenio Pérez
2020-09-04 4:34 ` Jason Wang
2020-09-28 9:05 ` Eugenio Perez Martin
2020-09-28 17:48 ` Peter Xu
2020-10-03 17:38 ` Michael S. Tsirkin
2020-10-05 6:32 ` Eugenio Perez Martin
2020-10-15 7:50 ` Jason Wang
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