https://linuxplumbersconf.org/event/11/contributions/954/

    
Download current event:
Calendar file
Detailed timetable calendar file
In order to enable an iCal export link, your account needs to have an
API key created. This key enables other applications to access data
from within Indico even when you are neither using nor logged into
the Indico system yourself with the link provided. Once created, you
can manage your key at any time by going to 'My Profile' and looking
under the tab entitled 'HTTP API'. Further information about HTTP API
keys can be found in the Indico documentation.
[ ] I have read and understood the above. [Accept & Create]
Additionally to having an API key associated with your account,
exporting private event information requires the usage of a
persistent signature. This enables API URLs which do not expire after
a few minutes so while the setting is active, anyone in possession of
the link provided can access the information. Due to this, it is
extremely important that you keep these links private and for your
use only. If you think someone else may have acquired access to a
link using this key in the future, you must immediately create a new
key pair on the 'My Profile' page under the 'HTTP API' and update the
iCalendar links afterwards.
[ ] I have read and understood the above.
[Accept & Create]
[                    ] [                    ]
Permanent link for public information only:
Permanent link for all public and protected information:
Please use CTRL + C to copy this URL
[ ] Detailed timetable
 

  * Compact style
  * Compact style
  * Indico style
  * Indico style - inline minutes
  * Indico Weeks View

 
Choose Timezone
(*) Use the event/category timezone
( ) Specify a timezone
[US/Mountain                   ]
Save
US/Pacific English

  * English (United Kingdom)
  * Espanol (Espana)
  * Francais (France)
  * Portugues (Brasil)
  * Zhong Wen  (Zhong Guo )

Login

Linux Plumbers Conference 2021

20-24 September 2021
US/Pacific timezone
[*]

  * LPC 2021 - Overview
  * LPC blog
  * Accepted Microconferences
  * 
  * Schedule Overview
      + Microconferences
      + LPC Refereed Track
      + Kernel Summit Track
      + Networking & BPF Summit Track
      + GNU Tools Track
      + Birds of a Feather (BoF)
      + Detailed Schedule
  * 
  * Job Board
  * Graphic Resources
  * LPC Slides submission guide
  * Attend
  * 
  * Anti-harassment policy
  * Call for Proposals
  * Contact
  * FAQs
  * LPC 2020 site

2021

  * contact@linuxplumbersconf.org

Use of eBPF in cpu scheduler

  
Download current contribution:
Calendar file
In order to enable an iCal export link, your account needs to have an
API key created. This key enables other applications to access data
from within Indico even when you are neither using nor logged into
the Indico system yourself with the link provided. Once created, you
can manage your key at any time by going to 'My Profile' and looking
under the tab entitled 'HTTP API'. Further information about HTTP API
keys can be found in the Indico documentation.
[ ] I have read and understood the above. [Accept & Create]
Additionally to having an API key associated with your account,
exporting private event information requires the usage of a
persistent signature. This enables API URLs which do not expire after
a few minutes so while the setting is active, anyone in possession of
the link provided can access the information. Due to this, it is
extremely important that you keep these links private and for your
use only. If you think someone else may have acquired access to a
link using this key in the future, you must immediately create a new
key pair on the 'My Profile' page under the 'HTTP API' and update the
iCalendar links afterwards.
[ ] I have read and understood the above.
[Accept & Create]
[                    ] [                    ]
Permanent link for public information only:
Permanent link for all public and protected information:
Please use CTRL + C to copy this URL
20 Sep 2021, 07:50
40m
Networking and BPF Summit/Virtual-Room (LPC Virtual)

Networking and BPF Summit/Virtual-Room

LPC Virtual

150
Networking & BPF Summit (Closed) BPF & Networking Summit

Speakers

Hao Luo (Google) Barret Rhoden (Google)

Description

eBPF has been used extensively in performance profiling and
monitoring. In this talk, I will describe a set of eBPF applications
that help monitor and enhance cpu scheduling performances. These
applications include:

  * Profiling scheduling latencies. I will talk about an application
    of eBPF to collect scheduling latency stats.

  * Profiling resource efficiency. For background, I will first
    introduce the scheduler feature core scheduling which is
    developed for mitigating L1TF cpu vulnerability. Then I will
    introduce the eBPF feature ksym which enables this application
    and describe how eBPF can help report the forced idle time, a
    type of cpu usage inefficiency caused by core scheduling.

  * The third application of eBPF is to assist userspace scheduling.
    ghOSt is a framework open sourced by Google to enable
    general-purpose delegation of scheduling policy to userspace
    processes in a Linux environment. ghOSt uses BPF acceleration for
    policy actions that need to happen closer to scheduling edges. We
    use this to maximize CPU utilization (pick_next_task), minimize
    jitter (task_tick elision) and control tail latency
    (select_task_rq on wakeup). We are also experimenting with BPF to
    implement a scaled-down variant of the scheduling policy while
    upgrading the main userspace ghOSt agent.

I agree to abide by the anti-harassment policy I agree

Primary authors

Hao Luo (Google) Barret Rhoden (Google)

Presentation Materials

There are no materials yet.
                          Powered by Indico
                     Hosting donated by LWN.net