From: tosher 1 <akm2tosher@yahoo.com>
To: "Roger Pau Monné" <roger.pau@citrix.com>
Cc: Xen-devel <xen-devel@lists.xenproject.org>
Subject: Re: Xen network domain performance for 10Gb NIC
Date: Tue, 28 Apr 2020 05:23:55 +0000 (UTC) [thread overview]
Message-ID: <1693679742.27711.1588051435928@mail.yahoo.com> (raw)
In-Reply-To: <20200427070317.GL28601@Air-de-Roger>
> Driver domains with passthrough devices need to perform IOMMU
operations in order to add/remove page table entries when doing grant
maps (ie: IOMMU TLB flushes), while dom0 doesn't need to because it
has the whole RAM identity mapped in the IOMMU tables. Depending on
how fast your IOMMU is and what capabilities it has doing such
operations can introduce a significant amount of overhead.
It makes sense to me. Do you know, in general, how to measure IOMMU performance, and what features/properties of IOMMU can contribute to getting a better network throughput? Please let me know.
Thanks!
next prev parent reply other threads:[~2020-04-28 5:24 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1359850718.562651.1587928713792.ref@mail.yahoo.com>
2020-04-26 19:18 ` Xen network domain performance for 10Gb NIC tosher 1
2020-04-27 5:28 ` Jürgen Groß
2020-04-27 19:27 ` tosher 1
2020-04-27 7:03 ` Roger Pau Monné
2020-04-28 5:23 ` tosher 1 [this message]
2020-04-28 7:07 ` Roger Pau Monné
2020-04-28 16:08 ` tosher 1
2020-04-28 16:21 ` Roger Pau Monné
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