Intel & FreeBSD: Better Together. Ben Widawsky

Transcription

1 Intel & FreeBSD: Better Together Ben Widawsky

2 Agenda Introduction (OTC & Me) Intel s past involvement with BSD Intel s latest involvement with BSD What s next Power Management deep-dive Q&A

3 Ben Widawsky Introduced to FreeBSD 5.0 in 2003 by Software Developer at Intel since 2005 Focus switched to FreeBSD upstream work in 2018 Diverse career

4 Intel Open Source Technology Center (OTC) Organization specializing in Open Source 20 years building expertise and acquiring industry talent The other Alan Cox Contributes to over 100 community projects Community Friendly licensing Match the ecosystem when possible GPLv2 or GPLv3 for utilities close to Linux Kernel Apache for cloud

5 BSD-Friendly Case Studies Intel Linux Graphics Intel Network Drivers Intel releases code GPL/BSD Intel develops Linux driver Community ports to FreeBSD Internally developed Intel releases GPL code for Linux and BSD code for FreeBSD Work required from community Licenses can become mixed Developed largely in the open Easy for community to contribute No work required from community Licenses are clear Developed largely internally Difficult to take community contributions

6 Agenda Introduction (OTC & Me) Intel s past involvement with BSD

7 Intel s Past Contributions 2011 jimharris@ started on integrated SAS controller in the Intel C jimharris@ merged isci(4), nvme(4), nvd(4), nvmecontrol(8) 2013 NTB (Non-Transparent Bridge) driver (by carl@) jimharris@ ported VTune drivers to FreeBSD 2014 jimharris@ merged ismt(4) DPDK on FreeBSD jimharris@ ported pcm

8 Intel s Past Contributions (cont d) 2015 Intel Ethernet team designates FreeBSD as Tier 1 OS cem@ merged an ioat(4) based on version developed by jimharris@ 2017 Intel Ethernet adopts iflib(9) as standard for future Ethernet driver releases Intel Ethernet releases iflib(9) drivers for 10Gbe Ethernet Products Glenn Weinberg ported PMDK Intel and FreeBSD Foundation establish collaborative relationship

9 Intel Adopts Security First Pledge Intel is working closely with our partners with the shared goal of restoring confidence in the security of our customers data Intel engages with FreeBSD Foundation to help ensure coordinated disclosure method to help mitigate side-channel security issues Intel works collaboratively ahead of public disclosure to develop: Engineering mitigation Relevant guidance and documentation 2-way communication channel Results in mitigated software and guidance in advance of disclosure

10 Agenda Introduction (OTC & Me) Intel s past involvement with BSD Intel s latest involvement with BSD

11 Humble Beginnings (2018) OTC forms a FreeBSD team Liaison and support for security mitigations OS/Hardware enabling in spare time Early tasks Laundry list of things to enable Scrubbing and prioritizing Goal - Be useful Doing instead of talking

12 The Context Switch Environment adjusting Decreasing build times Remote debugging (serial ports, kgdb, ddb, etc) Obtaining machines Acclimatize to community Get small patches committed Port a useful tool Turbostat Participate in community discussion/reviews 7 patches since July Session leader BSDCam 2018 Power Management Nvdimm testing Find 10 year old bug UFS + Quota + rename

13 Do Things People Care About Current Active Work iflib(9) drivers for Intel 40Gbe Ethernet products nvdimm namespace support working on setting attributes in geom power management improvements done debugging Thunderbolt scoping

14 Agenda Introduction (OTC & Me) Intel s past involvement with BSD Intel s new involvement with BSD What s next

15 Figuring Out What to Do Ideally: 1. community wants 2. sales interest 3. has a developer available and interested 4. customers are ready to deploy.

16 Stated Goal Make Intel products run better on FreeBSD. - Ben Widawsky 10/10/18

17 Requests So Far Device Drivers Intel Wireless Intel Graphics Thunderbolt evdev/udev Power Management / Performance Suspend Resume Improvements Robustness S4 Turbo Boost Bhyve GPU passthrough USB passthrough Internal/External APIs CUDA + Other HPC ALTQ replacement inotify/fsevents Code Cleanup Unification of i386, amd64, and x86 Tools Powertop port Device Drivers Intel Networking 100Gbe Better NVMe Error Handling QAT DSA (Data Streaming Accelerator) Power Management / Performance Runtime Power Management Internal/External APIs Security Enabling root of trust KPT Stability CI / test farm Tools/Libraries CET DPDK SPDK Snap RDT Better VTune support Nvme firmware updater

18 Prioritization

19 Rating What We re Doing PM NVDIMM TB

20 Call to Action Help me prioritize the work Help me understand where we can co-invest Help me find new work If a task has impact for Intel, Alliance with communities, and is feasible, send it my way! Power Management If you have ideas on how runtime power management should look Help me move the point in the Venn diagram Be nice :-)

21 Agenda Introduction (OTC & Me) Intel s past involvement with BSD Intel s new involvement with BSD What s next Power Management deep-dive

22 Power Management Goals Goal 1.Understand the existing suspend/resume path 2.Add a suspend-to-idle option Reality 3.Emulated S3 a.enable s0ix for platforms which support it 4.Design a runtime power management framework 5.Take a platform and make that work The definition of insanity is doing the same thing over and over and expecting different results. Albert Einstein

23 Sleep Flow Lid Close S3 Sleep Button Power Button Sx Down Devices ACPI Prep Event S5 Power Off Restore CPU ACPI Wake Up Devices Down CPU

24 Emulated S3 Flow aka Suspend to Idle Lid Close S3 Sleep Button Power Button Down Devices ACPI Prep Event Sx Idle CPU S5 Power Off Restore CPU ACPI Wake Up Devices Down CPU

25 Opportunistic Idle Delay hysteresis LPI? Idle CPU Wake Event Device Idle Device Idle Device Idle Device Idle Device Idle Up Devices Refcount vs. Poll All devices or just some?

26 Power Management Status Suspend-to-idle debugging Random wakeups Random poweroff Dead Beginning to think about runtime PM Wishlist rtcwake equivalent (help remote testing) serial portless debugging nvme(4) robustification Bring devices back up on failures in sleep path Example: prints in wakeup events

27 Agenda Introduction (OTC & Me) Intel s past involvement with BSD Intel s new involvement with BSD What s next Power Management deep-dive Q&A

28 Thanks + Q&A Jim Harris - Contributing the non-network Intel history Shan Greer - Contributing network driver Intel history Eric Joyner - Explaining the licensing in network driver team John Venn FreeBSD community jhb@ emaste@

29 Contacts/Links - official stuff - FreeBSD stuff - everything else Personal Personal Blog - Add to the blog Docs/Links Low Power Idle