From: Jason Gunthorpe <jgg@nvidia.com>
To: Zhangfei Gao <zhangfei.gao@linaro.org>
Cc: Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>,
Nicolin Chen <nicolinc@nvidia.com>,
Robin Murphy <robin.murphy@arm.com>,
"kevin.tian@intel.com" <kevin.tian@intel.com>,
"yi.l.liu@intel.com" <yi.l.liu@intel.com>,
"eric.auger@redhat.com" <eric.auger@redhat.com>,
"baolu.lu@linux.intel.com" <baolu.lu@linux.intel.com>,
"jean-philippe@linaro.org" <jean-philippe@linaro.org>,
"iommu@lists.linux.dev" <iommu@lists.linux.dev>,
qianweili <qianweili@huawei.com>
Subject: Re: Cache Invalidation Solution for Nested IOMMU
Date: Thu, 6 Apr 2023 08:40:04 -0300 [thread overview]
Message-ID: <ZC6vlI7onlUgBidX@nvidia.com> (raw)
In-Reply-To: <CABQgh9G_Xa6h7ujRJkCogp02N87OAugBTEuXyccQREw28VfZCQ@mail.gmail.com>
On Thu, Apr 06, 2023 at 02:23:17PM +0800, Zhangfei Gao wrote:
> We are using ioctl method now.
> From the testing, the TLB miss impacts performance a lot, so we use
> huge page method.
> After using huge page method, guest can achieve comparable performance
> with host.
Looks like these tests are not stressing the MM, just measuring pure
BW of the DMA, so they don't get into the invalidation regime..
You need to measure a more real application that is actually using the
MM (eg alloc/free memory, fork, etc) while it operates and turn on SVA.
Jason
next prev parent reply other threads:[~2023-04-06 11:40 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-03 0:33 Cache Invalidation Solution for Nested IOMMU Nicolin Chen
2023-04-03 7:26 ` Liu, Yi L
2023-04-03 8:39 ` Tian, Kevin
2023-04-03 15:24 ` Nicolin Chen
2023-04-04 2:42 ` Tian, Kevin
2023-04-04 3:12 ` Nicolin Chen
2023-04-03 12:23 ` Jason Gunthorpe
2023-04-03 8:00 ` Tian, Kevin
2023-04-03 14:29 ` Nicolin Chen
2023-04-04 2:15 ` Tian, Kevin
2023-04-04 2:47 ` Nicolin Chen
2023-04-03 14:08 ` Jason Gunthorpe
2023-04-03 14:51 ` Nicolin Chen
2023-04-03 19:15 ` Robin Murphy
2023-04-04 0:02 ` Nicolin Chen
2023-04-04 16:20 ` Jason Gunthorpe
2023-04-04 16:50 ` Shameerali Kolothum Thodi
2023-04-05 11:57 ` Jason Gunthorpe
2023-04-06 6:23 ` Zhangfei Gao
2023-04-06 6:39 ` Nicolin Chen
2023-04-06 11:40 ` Jason Gunthorpe [this message]
2023-04-10 1:08 ` Nicolin Chen
2023-04-11 9:07 ` Jean-Philippe Brucker
2023-04-11 11:57 ` Jason Gunthorpe
2023-04-11 18:39 ` Nicolin Chen
2023-04-11 18:41 ` Jason Gunthorpe
2023-04-11 19:02 ` Nicolin Chen
2023-04-11 18:43 ` Nicolin Chen
2023-04-12 2:47 ` Zhangfei Gao
2023-04-12 5:47 ` Nicolin Chen
2023-05-03 15:14 ` Shameerali Kolothum Thodi
2023-05-03 23:44 ` Nicolin Chen
2023-04-05 5:45 ` Nicolin Chen
2023-04-05 11:37 ` Jason Gunthorpe
2023-04-05 15:34 ` Nicolin Chen
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