From: SeongJae Park <sjpark@xxxxxxxxx>
On Fri, 23 Jul 2021 08:30:41 +0000 SeongJae Park <sj38.park@xxxxxxxxx> wrote:
> From: SeongJae Park <sjpark@xxxxxxxxx>
>
> Hello Dongjoo,
>
>
> On Fri, 23 Jul 2021 16:02:44 +0900 Dongjoo Seo <dseo3@xxxxxxx> wrote:
>
> > Hello, I am new user of this amazing tool.
>
> Thank you! It's always great to meet a new user!
>
> > I want to use this tool for Nvidia tx2 board with kernel version 4.9.140.
> >
> > Do you guys have any timeline or update schedule for different kernel version compatibility?
>
> I didn't have such a plan until now, but I think I can find a time slot to do
> one-time back porting of current DAMON on 4.9.140. I think continuous support
> would be not so easy, though. Nevertheless, if you need that, please feel free
> to let me know. Once it's done, I will notify you.
Thank you for waiting. I back-ported this patchset and another one for the
physical address space monitoring[1] on v4.9.140. The source code is available
at DAMON development tree[2].
BTW, I can also agree to Greg's opinion. For the reason, I also back-ported
the patches on latest v4.9.y[3]. I'd like to suggest you to try that first if
possible. I also hope this patchset to be merged in mainline in near future,
so that NVIDIA be attracted by DAMON and thus forward-port their drivers on the
latest mainline version.
Nevertheless, DAMOS[4] and DAMON_RECLAIM[5] patchsets are not back-ported
because those need more works, and you are apparently interested in only the
monitoring part.
Please note that this backport is for only one-time. In other words, I will
not backport the patches for every future 4.9.y release. Nevertheless, if you
need another backport, please remember I'm here for you.
Finally, a disclaimer. I did only minimal test for this, as below:
$ git clone https://github.com/sjp38/masim; make -C masim/
$ git clone https://github.com/awslabs/damo
$ # monitor a virtual address space of a process
$ sudo ./damo/damo record "./masim/masim ./masim/configs/zigzag.cfg"
$ ./damo/damo report heats --heatmap stdout
[...]
88888888888888888888888888888888888888600000000000000000000000000000000000000000
88888888888888888888888888888888888888600000000000000000000000000000000000000000
44444444444444444444444444444444444444444444444444444444444444444444444444444200
00000000000000000000000000000000000000288888888888888888888888888888888888888400
00000000000000000000000000000000000000288888888888888888888888888888888888888400
55555555555555555555555555555555555555422222222222222222222222222222222222222100
88888888888888888888888888888888888888600000000000000000000000000000000000000000
88888888888888888888888888888888888888600000000000000000000000000000000000000000
[...]
# x-axis: space (140021718388736-140021924798416: 196.848 MiB)
# y-axis: time (247055083700-317341924740: 1 m 10.287 s)
# resolution: 80x40 (2.461 MiB and 1.757 s for each character)
$ # monitor the physcial address space of the system
$ ./masim/masim ./masim/configs/zigzag.cfg &
$ sudo ./damo/damo record paddr
00000000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000020
00000000000000000000000000000000000000000000000000000000000000000000000000000040
[...]
# x-axis: space (4294967296-136303345616: 122.942 GiB)
# y-axis: time (356358198969-430518964169: 1 m 14.161 s)
# resolution: 80x40 (1.537 GiB and 1.854 s for each character)
Hope you get some fun with these backports.
[1] https://lore.kernel.org/linux-mm/20201216094221.11898-1-sjpark@xxxxxxxxxx/
[2] https://github.com/sjp38/linux/tree/damon/for-v4.9.140
[3] https://github.com/sjp38/linux/tree/damon/for-v4.9.276
[4] https://lore.kernel.org/linux-mm/20201216084404.23183-1-sjpark@xxxxxxxxxx/
[5] https://lore.kernel.org/linux-mm/20210720131309.22073-1-sj38.park@xxxxxxxxx/
Thanks,
SeongJae Park
[...]
