From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Sheng Yang <sheng@linux.intel.com>
Cc: Keir Fraser <keir.fraser@eu.citrix.com>,
Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>,
xen-devel <xen-devel@lists.xensource.com>,
Eddie Dong <eddie.dong@intel.com>,
linux-kernel@vger.kernel.org,
Jun Nakajima <jun.nakajima@intel.com>
Subject: Re: [Xen-devel] [RFC][PATCH 0/10] Xen Hybrid extension support
Date: Wed, 16 Sep 2009 09:31:04 -0400 [thread overview]
Message-ID: <20090916133104.GB14725@phenom.dumpdata.com> (raw)
In-Reply-To: <1253090551-7969-1-git-send-email-sheng@linux.intel.com>
On Wed, Sep 16, 2009 at 04:42:21PM +0800, Sheng Yang wrote:
> Hi, Keir & Jeremy
>
> This patchset enabled Xen Hybrid extension support.
>
> As we know that PV guest have performance issue with x86_64 that guest kernel
> and userspace resistent in the same ring, then the necessary TLB flushes when
> switch between guest userspace and guest kernel cause overhead, and much more
> syscall overhead is also introduced. The Hybrid Extension estimated these
> overhead by putting guest kernel back in (non-root) ring0 then achieve the better
> performance than PV guest.
What was the overhead? Is there a step-by-step list of operations you did
to figure out the performance numbers?
I am asking this b/c at some point I would like to compare the pv-ops vs native
and I am not entirely sure what is the best way to do this.
next prev parent reply other threads:[~2009-09-16 13:45 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-16 8:42 [RFC][PATCH 0/10] Xen Hybrid extension support Sheng Yang
2009-09-16 8:42 ` [RFC][PATCH 01/10] xen/pvhvm: add support for hvm_op Sheng Yang
2009-09-16 8:42 ` [RFC][PATCH 02/10] xen/hybrid: Import cpuid.h from Xen Sheng Yang
2009-09-16 8:42 ` [RFC][PATCH 03/10] xen/hybrid: Xen Hybrid Extension initialization Sheng Yang
2009-09-16 20:24 ` [Xen-devel] " Jeremy Fitzhardinge
2009-09-17 6:22 ` Keir Fraser
2009-09-17 16:46 ` Jeremy Fitzhardinge
2009-09-16 8:42 ` [RFC][PATCH 04/10] xen/hybrid: Modify pv_init_ops and xen_info Sheng Yang
2009-09-16 8:42 ` [RFC][PATCH 05/10] xen/hybrid: Add PV halt support Sheng Yang
2009-09-16 8:42 ` [RFC][PATCH 06/10] xen/hybrid: Add shared_info page for xen Sheng Yang
2009-09-16 8:42 ` [RFC][PATCH 07/10] xen/hybrid: Add PV timer support Sheng Yang
2009-09-16 20:25 ` [Xen-devel] " Jeremy Fitzhardinge
2009-09-17 5:54 ` Sheng Yang
2009-09-16 8:42 ` [RFC][PATCH 08/10] x86: Don't ack_APIC_irq() if lapic is disabled in GENERIC_INTERRUPT_VECTOR handler Sheng Yang
2009-09-16 8:58 ` Cyrill Gorcunov
2009-09-16 9:03 ` Cyrill Gorcunov
2009-09-16 9:37 ` Cyrill Gorcunov
2009-09-17 3:54 ` Sheng Yang
2009-09-16 8:42 ` [RFC][PATCH 09/10] xen/hybrid: Make event channel work with QEmu emulated devices Sheng Yang
2009-09-16 20:35 ` [Xen-devel] " Jeremy Fitzhardinge
2009-09-17 5:58 ` Sheng Yang
2009-09-16 8:42 ` [RFC][PATCH 10/10] xen/hybrid: Enable grant table and xenbus Sheng Yang
2009-09-16 13:31 ` Konrad Rzeszutek Wilk [this message]
2009-09-17 8:59 ` [Xen-devel] [RFC][PATCH 0/10] Xen Hybrid extension support Sheng Yang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20090916133104.GB14725@phenom.dumpdata.com \
--to=konrad.wilk@oracle.com \
--cc=eddie.dong@intel.com \
--cc=jeremy.fitzhardinge@citrix.com \
--cc=jun.nakajima@intel.com \
--cc=keir.fraser@eu.citrix.com \
--cc=linux-kernel@vger.kernel.org \
--cc=sheng@linux.intel.com \
--cc=xen-devel@lists.xensource.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.