From: Rob Gardner <rob.gardner@hp.com>
To: Rob Gardner <rob.gardner@hp.com>
Cc: "Magenheimer,
Dan (HP Labs Fort Collins)" <dan.magenheimer@hp.com>,
Ian Pratt <m+Ian.Pratt@cl.cam.ac.uk>,
xen-devel@lists.xensource.com
Subject: Re: Recent trace patch not arch-neutral
Date: Mon, 31 Oct 2005 16:26:19 -0700 [thread overview]
Message-ID: <4366A81B.2050509@hp.com> (raw)
In-Reply-To: <4366A2B4.6070406@hp.com>
[-- Attachment #1.1: Type: text/plain, Size: 706 bytes --]
Rob Gardner wrote:
>
> Now, to answer Dan's question- the rdtscll thing is just a time stamp
> counter, expressed in cycles. So on ia64 you could probably replace it
> with an asm statement to read ar.itc to make everything work. We just
> need a little wrapper to do the right thing for each architecture. Now
> Dan, if you were more conveniently located, perhaps we could work
> together and fix this. ;)
>
I imagine we just need something that looks like this in trace.c:
#ifdef x86
rdtscll(rec->cycles);
#endif
#ifdef IA64
__asm__ __volatile ("mov %0=ar.itc;;" : "=r"(rec->cycles) ::
"memory");
#endif
Dan, perhaps you know the nice clean way of doing this sort of thing?
Rob
[-- Attachment #1.2: Type: text/html, Size: 1186 bytes --]
[-- Attachment #2: Type: text/plain, Size: 138 bytes --]
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel
next prev parent reply other threads:[~2005-10-31 23:26 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-31 22:18 Recent trace patch not arch-neutral Ian Pratt
2005-10-31 23:03 ` Rob Gardner
2005-10-31 23:26 ` Rob Gardner [this message]
2005-11-01 6:18 ` Muli Ben-Yehuda
2005-11-01 6:38 ` Rob Gardner
2005-11-01 6:45 ` Muli Ben-Yehuda
2005-11-01 9:27 ` Keir Fraser
-- strict thread matches above, loose matches on Subject: below --
2005-11-02 17:47 Magenheimer, Dan (HP Labs Fort Collins)
2005-11-01 13:25 Magenheimer, Dan (HP Labs Fort Collins)
2005-11-01 13:59 ` Keir Fraser
2005-10-31 22:32 Magenheimer, Dan (HP Labs Fort Collins)
2005-10-31 21:33 Magenheimer, Dan (HP Labs Fort Collins)
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=4366A81B.2050509@hp.com \
--to=rob.gardner@hp.com \
--cc=dan.magenheimer@hp.com \
--cc=m+Ian.Pratt@cl.cam.ac.uk \
--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.