* Hypercall overhead measurement on Xen/ARM
@ 2015-01-16 16:17 Jintack Lim
2015-01-19 12:58 ` Stefano Stabellini
0 siblings, 1 reply; 2+ messages in thread
From: Jintack Lim @ 2015-01-16 16:17 UTC (permalink / raw)
To: xen-devel; +Cc: Christoffer Dall, Shih-Wei Li
Hi,
I'm trying to measure number of cycles for hypercalls.
I'm working on ARM v7 and v8.
Xentrace seems to be a right tool to use according to this discussion.
http://lists.xen.org/archives/html/xen-devel/2008-10/msg00480.html
However when I ran it on ARM, it gave an error.
The error is the same as in this discussion in 2014 below.
Xentrace on ARM is not supported?
http://lists.xen.org/archives/html/xen-devel/2014-02/msg00154.html
http://lists.xen.org/archives/html/xen-devel/2014-02/msg00206.html
Are there other tools for this purpose?
Thanks,
Jintack
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Hypercall overhead measurement on Xen/ARM
2015-01-16 16:17 Hypercall overhead measurement on Xen/ARM Jintack Lim
@ 2015-01-19 12:58 ` Stefano Stabellini
0 siblings, 0 replies; 2+ messages in thread
From: Stefano Stabellini @ 2015-01-19 12:58 UTC (permalink / raw)
To: Jintack Lim; +Cc: Christoffer Dall, Shih-Wei Li, xen-devel
On Fri, 16 Jan 2015, Jintack Lim wrote:
> Hi,
>
> I'm trying to measure number of cycles for hypercalls.
> I'm working on ARM v7 and v8.
>
> Xentrace seems to be a right tool to use according to this discussion.
> http://lists.xen.org/archives/html/xen-devel/2008-10/msg00480.html
>
> However when I ran it on ARM, it gave an error.
> The error is the same as in this discussion in 2014 below.
> Xentrace on ARM is not supported?
> http://lists.xen.org/archives/html/xen-devel/2014-02/msg00154.html
> http://lists.xen.org/archives/html/xen-devel/2014-02/msg00206.html
>
> Are there other tools for this purpose?
Hello Jintack,
xentrance has not been ported to ARM yet, but it would be great to have
it!
Otherwise you can just read CNTPCT (you can call get_s_time()) at the
right places.
Cheers,
Stefano
^ permalink raw reply [flat|nested] 2+ messages in thread
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2015-01-19 12:58 ` Stefano Stabellini
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