Hi,
There is a BoF session scheduled on Linux Plumbers Conference 2019 event.
If you plan attend the event feel free to join and discuss about the BoF
topic and beyond:
Linux Perf advancements for compute intensive and server systems:
"Modern server and compute intensive systems are naturally built around
several top performance CPUs with large amount of cores and equipped
by shared memory that spans a number of NUMA domains. Compute intensive
workloads usually implement highly parallel CPU bound cyclic codes
performing mathematics calculations that reference data located in
the shared memory. Performance observability and profiling of these
workloads on such systems have unique characteristics and impose specific
requirements on software performance tools. The requirements include
tools CPU scalability, coping with high rate and volume of collected
performance data as well as NUMA awareness. In order to fulfill that
requirements a number of extensions have been implemented in Linux Perf
tool that are currently a part of the Linux kernel source tree
[1], [2], [3], [4]"
Best regards,
Alexey
[1] https://marc.info/?l=linux-kernel&m=154149439404555&w=2
[2] https://marc.info/?l=linux-kernel&m=154817912621465&w=2
[3] https://marc.info/?l=linux-kernel&m=155293062518459&w=2
[4] https://www.kernel.org/doc/html/latest/admin-guide/perf-security.html
Em Mon, Aug 26, 2019 at 02:36:48PM +0300, Alexey Budankov escreveu:
>
> Hi,
>
> There is a BoF session scheduled on Linux Plumbers Conference 2019 event.
> If you plan attend the event feel free to join and discuss about the BoF
> topic and beyond:
>
> Linux Perf advancements for compute intensive and server systems:
>
> "Modern server and compute intensive systems are naturally built around
> several top performance CPUs with large amount of cores and equipped
> by shared memory that spans a number of NUMA domains. Compute intensive
> workloads usually implement highly parallel CPU bound cyclic codes
> performing mathematics calculations that reference data located in
> the shared memory. Performance observability and profiling of these
> workloads on such systems have unique characteristics and impose specific
> requirements on software performance tools. The requirements include
> tools CPU scalability, coping with high rate and volume of collected
> performance data as well as NUMA awareness. In order to fulfill that
> requirements a number of extensions have been implemented in Linux Perf
> tool that are currently a part of the Linux kernel source tree
> [1], [2], [3], [4]"
All those are already merged, after long reviewing phases and lots of
testing, right?
I think the next step for people working in this area, in preparation
for this BoF, is to list what are their current efforts, like Ian et all
did in:
https://linuxplumbersconf.org/event/4/contributions/291/
- Arnaldo
> Best regards,
> Alexey
>
> [1] https://marc.info/?l=linux-kernel&m=154149439404555&w=2
> [2] https://marc.info/?l=linux-kernel&m=154817912621465&w=2
> [3] https://marc.info/?l=linux-kernel&m=155293062518459&w=2
> [4] https://www.kernel.org/doc/html/latest/admin-guide/perf-security.html
--
- Arnaldo
On 26.08.2019 16:55, Arnaldo Carvalho de Melo wrote:
> Em Mon, Aug 26, 2019 at 02:36:48PM +0300, Alexey Budankov escreveu:
>>
>> Hi,
>>
>> There is a BoF session scheduled on Linux Plumbers Conference 2019 event.
>> If you plan attend the event feel free to join and discuss about the BoF
>> topic and beyond:
>>
>> Linux Perf advancements for compute intensive and server systems:
<SNIP>
>
> All those are already merged, after long reviewing phases and lots of
> testing, right?
Right. These changes now constitute parts of the Linux kernel source tree.
~Alexey
>
> I think the next step for people working in this area, in preparation
> for this BoF, is to list what are their current efforts, like Ian et all
> did in:
>
> https://linuxplumbersconf.org/event/4/contributions/291/
>
> - Arnaldo
>
>> Best regards,
>> Alexey
>>
>> [1] https://marc.info/?l=linux-kernel&m=154149439404555&w=2
>> [2] https://marc.info/?l=linux-kernel&m=154817912621465&w=2
>> [3] https://marc.info/?l=linux-kernel&m=155293062518459&w=2
>> [4] https://www.kernel.org/doc/html/latest/admin-guide/perf-security.html
>
>
> >
> > All those are already merged, after long reviewing phases and lots of
> > testing, right?
>
> Right. These changes now constitute parts of the Linux kernel source tree.
Might be better to focus on future areas that haven't been merged yet.
-Andi
Em Mon, Aug 26, 2019 at 10:57:58AM -0700, Andi Kleen escreveu:
> >
> > >
> > > All those are already merged, after long reviewing phases and lots of
> > > testing, right?
> >
> > Right. These changes now constitute parts of the Linux kernel source tree.
>
> Might be better to focus on future areas that haven't been merged yet.
Agreed, we can have a initial, short report on what has been done to
address these issues, and I think Alexey could take care of that, but
then we should try and list here what else in addition to what Ian et
all listed on their talk.
And perhaps even things that ammeliorate the problems they list there,
i.e. Ian, Stephane, the things that Alexey listed were already
tested/considered by you guys?
- Arnaldo
On Mon, Aug 26, 2019 at 07:10:21PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Mon, Aug 26, 2019 at 10:57:58AM -0700, Andi Kleen escreveu:
> > >
> > > >
> > > > All those are already merged, after long reviewing phases and lots of
> > > > testing, right?
> > >
> > > Right. These changes now constitute parts of the Linux kernel source tree.
> >
> > Might be better to focus on future areas that haven't been merged yet.
>
> Agreed, we can have a initial, short report on what has been done to
> address these issues, and I think Alexey could take care of that, but
> then we should try and list here what else in addition to what Ian et
> all listed on their talk.
>
> And perhaps even things that ammeliorate the problems they list there,
> i.e. Ian, Stephane, the things that Alexey listed were already
> tested/considered by you guys?
there's also ongoing work on adding threads to perf record:
https://lore.kernel.org/lkml/[email protected]/#t
currently being stuck on me sending the perf_sesion changes
Alexey ran some initial benchmarks and it seems to perform nicely,
not sure we discussed the results on list thought
jirka