SlideShare une entreprise Scribd logo
1  sur  10
Télécharger pour lire hors ligne
Group photograph at Linaro Connect in Copenhagen
Monday 29 Oct 2012
LCA13, March 6, 2013
Robert Richter <robert.richter@calxeda.com>
BOF Reliability Accessibility
and Serviceability (RAS)
Slide www.linaro.org
Agenda
www.linaro.org
Existing subsystems and tools
• mcelog (http://www.mcelog.org/)
• EDAC drivers
• generic tracepoint: trace_mce_record()
(implemented only on x86)
• some other arch specific kernel implementations
(alpha, powerpc, sparc)
www.linaro.org
mcelog
• x86 shared kernel mce code for Intel and AMD
●
nmi handler
●
trace point
●
MCE device (/dev/mce) for Intel
●
AMD driver only logs to console
• buffers not mmap'ed
• mcelog tool works only for Intel
www.linaro.org
EDAC drivers
• many separate drivers available
• unified sysfs layout
• edac-util (using sysfs)
• memory only, no other events (cpu, io, power,
etc.)
• polls only sysfs, not event driven
www.linaro.org
Tracepoints
• trace_mce_record()
• include/trace/events/mce.h
• perf_event subsystem is used as kernel/user i/f
• currently only x86 kernel implementation
• usable for other archs since tracepoints are
generic in the kernel
www.linaro.org
Implementing RAS for ARM
• mcelog not suitable: maintained and developed by
Intel only
• edac: memory errors only, bunch of individual
drivers
• only arch dependent RAS solutions exist
Add another RAS for ARM?
No, let's implement an arch independent RAS
solution for Linux.
www.linaro.org
RAS daemon
• follow a proposal by Borislav Petkov of a generic
approach for a RAS daemon
• patch set, not yet upstream:
https://lkml.org/lkml/2011/4/23/72
• implement a generic and arch independent daemon
• use tracepoints and the perf_event subsystem to collect
events in a kernel ringbuffer
• reuse perf_event userland to access the event buffers
• add a RAS daemon to tools/ of the kernel repository
• do a reference implementation for x86 and arm
www.linaro.org
RAS daemon - Advantages
• generic approach
• reuse of existing code (esp. perf code)
• event-driven and mmap'ed buffers
• supported by the kernel community, x86
maintainers seem to like it
• standard and flexible framework allows easily
adding features by the kernel community (same
as for perf)
www.linaro.org
RAS daemon - Work to do
• start with memory error counting (ECC)
• kernel:
●
add persistent events to kernel:
– always enabled since early boot
– handle multiple users of event buffers
●
add machine check drivers for ARM
• userland
●
sharing code in tools/perf needs some rework
●
implement initial version of a RAS daemon with basic
feature set (logging and statistic)
●
define and add more features

Contenu connexe

Plus de Linaro

Intelligent Interconnect Architecture to Enable Next Generation HPC - Linaro ...
Intelligent Interconnect Architecture to Enable Next Generation HPC - Linaro ...Intelligent Interconnect Architecture to Enable Next Generation HPC - Linaro ...
Intelligent Interconnect Architecture to Enable Next Generation HPC - Linaro ...
Linaro
 
Andrew J Younge - Vanguard Astra - Petascale Arm Platform for U.S. DOE/ASC Su...
Andrew J Younge - Vanguard Astra - Petascale Arm Platform for U.S. DOE/ASC Su...Andrew J Younge - Vanguard Astra - Petascale Arm Platform for U.S. DOE/ASC Su...
Andrew J Younge - Vanguard Astra - Petascale Arm Platform for U.S. DOE/ASC Su...
Linaro
 
HKG18-501 - EAS on Common Kernel 4.14 and getting (much) closer to mainline
HKG18-501 - EAS on Common Kernel 4.14 and getting (much) closer to mainlineHKG18-501 - EAS on Common Kernel 4.14 and getting (much) closer to mainline
HKG18-501 - EAS on Common Kernel 4.14 and getting (much) closer to mainline
Linaro
 
HKG18-501 - EAS on Common Kernel 4.14 and getting (much) closer to mainline
HKG18-501 - EAS on Common Kernel 4.14 and getting (much) closer to mainlineHKG18-501 - EAS on Common Kernel 4.14 and getting (much) closer to mainline
HKG18-501 - EAS on Common Kernel 4.14 and getting (much) closer to mainline
Linaro
 
HKG18- 115 - Partitioning ARM Systems with the Jailhouse Hypervisor
HKG18- 115 - Partitioning ARM Systems with the Jailhouse HypervisorHKG18- 115 - Partitioning ARM Systems with the Jailhouse Hypervisor
HKG18- 115 - Partitioning ARM Systems with the Jailhouse Hypervisor
Linaro
 
HKG18-TR08 - Upstreaming SVE in QEMU
HKG18-TR08 - Upstreaming SVE in QEMUHKG18-TR08 - Upstreaming SVE in QEMU
HKG18-TR08 - Upstreaming SVE in QEMU
Linaro
 
HKG18-120 - Devicetree Schema Documentation and Validation
HKG18-120 - Devicetree Schema Documentation and Validation HKG18-120 - Devicetree Schema Documentation and Validation
HKG18-120 - Devicetree Schema Documentation and Validation
Linaro
 
HKG18-223 - Trusted FirmwareM: Trusted boot
HKG18-223 - Trusted FirmwareM: Trusted bootHKG18-223 - Trusted FirmwareM: Trusted boot
HKG18-223 - Trusted FirmwareM: Trusted boot
Linaro
 
HKG18-500K1 - Keynote: Dileep Bhandarkar - Emerging Computing Trends in the D...
HKG18-500K1 - Keynote: Dileep Bhandarkar - Emerging Computing Trends in the D...HKG18-500K1 - Keynote: Dileep Bhandarkar - Emerging Computing Trends in the D...
HKG18-500K1 - Keynote: Dileep Bhandarkar - Emerging Computing Trends in the D...
Linaro
 
HKG18-317 - Arm Server Ready Program
HKG18-317 - Arm Server Ready ProgramHKG18-317 - Arm Server Ready Program
HKG18-317 - Arm Server Ready Program
Linaro
 
HKG18-312 - CMSIS-NN
HKG18-312 - CMSIS-NNHKG18-312 - CMSIS-NN
HKG18-312 - CMSIS-NN
Linaro
 
HKG18-301 - Dramatically Accelerate 96Board Software via an FPGA with Integra...
HKG18-301 - Dramatically Accelerate 96Board Software via an FPGA with Integra...HKG18-301 - Dramatically Accelerate 96Board Software via an FPGA with Integra...
HKG18-301 - Dramatically Accelerate 96Board Software via an FPGA with Integra...
Linaro
 
HKG18-300K2 - Keynote: Tomas Evensen - All Programmable SoCs? – Platforms to ...
HKG18-300K2 - Keynote: Tomas Evensen - All Programmable SoCs? – Platforms to ...HKG18-300K2 - Keynote: Tomas Evensen - All Programmable SoCs? – Platforms to ...
HKG18-300K2 - Keynote: Tomas Evensen - All Programmable SoCs? – Platforms to ...
Linaro
 
HKG18-212 - Trusted Firmware M: Introduction
HKG18-212 - Trusted Firmware M: IntroductionHKG18-212 - Trusted Firmware M: Introduction
HKG18-212 - Trusted Firmware M: Introduction
Linaro
 
HKG18-116 - RAS Solutions for Arm64 Servers
HKG18-116 - RAS Solutions for Arm64 ServersHKG18-116 - RAS Solutions for Arm64 Servers
HKG18-116 - RAS Solutions for Arm64 Servers
Linaro
 

Plus de Linaro (20)

Intelligent Interconnect Architecture to Enable Next Generation HPC - Linaro ...
Intelligent Interconnect Architecture to Enable Next Generation HPC - Linaro ...Intelligent Interconnect Architecture to Enable Next Generation HPC - Linaro ...
Intelligent Interconnect Architecture to Enable Next Generation HPC - Linaro ...
 
Yutaka Ishikawa - Post-K and Arm HPC Ecosystem - Linaro Arm HPC Workshop Sant...
Yutaka Ishikawa - Post-K and Arm HPC Ecosystem - Linaro Arm HPC Workshop Sant...Yutaka Ishikawa - Post-K and Arm HPC Ecosystem - Linaro Arm HPC Workshop Sant...
Yutaka Ishikawa - Post-K and Arm HPC Ecosystem - Linaro Arm HPC Workshop Sant...
 
Andrew J Younge - Vanguard Astra - Petascale Arm Platform for U.S. DOE/ASC Su...
Andrew J Younge - Vanguard Astra - Petascale Arm Platform for U.S. DOE/ASC Su...Andrew J Younge - Vanguard Astra - Petascale Arm Platform for U.S. DOE/ASC Su...
Andrew J Younge - Vanguard Astra - Petascale Arm Platform for U.S. DOE/ASC Su...
 
HKG18-501 - EAS on Common Kernel 4.14 and getting (much) closer to mainline
HKG18-501 - EAS on Common Kernel 4.14 and getting (much) closer to mainlineHKG18-501 - EAS on Common Kernel 4.14 and getting (much) closer to mainline
HKG18-501 - EAS on Common Kernel 4.14 and getting (much) closer to mainline
 
HKG18-100K1 - George Grey: Opening Keynote
HKG18-100K1 - George Grey: Opening KeynoteHKG18-100K1 - George Grey: Opening Keynote
HKG18-100K1 - George Grey: Opening Keynote
 
HKG18-318 - OpenAMP Workshop
HKG18-318 - OpenAMP WorkshopHKG18-318 - OpenAMP Workshop
HKG18-318 - OpenAMP Workshop
 
HKG18-501 - EAS on Common Kernel 4.14 and getting (much) closer to mainline
HKG18-501 - EAS on Common Kernel 4.14 and getting (much) closer to mainlineHKG18-501 - EAS on Common Kernel 4.14 and getting (much) closer to mainline
HKG18-501 - EAS on Common Kernel 4.14 and getting (much) closer to mainline
 
HKG18-315 - Why the ecosystem is a wonderful thing, warts and all
HKG18-315 - Why the ecosystem is a wonderful thing, warts and allHKG18-315 - Why the ecosystem is a wonderful thing, warts and all
HKG18-315 - Why the ecosystem is a wonderful thing, warts and all
 
HKG18- 115 - Partitioning ARM Systems with the Jailhouse Hypervisor
HKG18- 115 - Partitioning ARM Systems with the Jailhouse HypervisorHKG18- 115 - Partitioning ARM Systems with the Jailhouse Hypervisor
HKG18- 115 - Partitioning ARM Systems with the Jailhouse Hypervisor
 
HKG18-TR08 - Upstreaming SVE in QEMU
HKG18-TR08 - Upstreaming SVE in QEMUHKG18-TR08 - Upstreaming SVE in QEMU
HKG18-TR08 - Upstreaming SVE in QEMU
 
HKG18-113- Secure Data Path work with i.MX8M
HKG18-113- Secure Data Path work with i.MX8MHKG18-113- Secure Data Path work with i.MX8M
HKG18-113- Secure Data Path work with i.MX8M
 
HKG18-120 - Devicetree Schema Documentation and Validation
HKG18-120 - Devicetree Schema Documentation and Validation HKG18-120 - Devicetree Schema Documentation and Validation
HKG18-120 - Devicetree Schema Documentation and Validation
 
HKG18-223 - Trusted FirmwareM: Trusted boot
HKG18-223 - Trusted FirmwareM: Trusted bootHKG18-223 - Trusted FirmwareM: Trusted boot
HKG18-223 - Trusted FirmwareM: Trusted boot
 
HKG18-500K1 - Keynote: Dileep Bhandarkar - Emerging Computing Trends in the D...
HKG18-500K1 - Keynote: Dileep Bhandarkar - Emerging Computing Trends in the D...HKG18-500K1 - Keynote: Dileep Bhandarkar - Emerging Computing Trends in the D...
HKG18-500K1 - Keynote: Dileep Bhandarkar - Emerging Computing Trends in the D...
 
HKG18-317 - Arm Server Ready Program
HKG18-317 - Arm Server Ready ProgramHKG18-317 - Arm Server Ready Program
HKG18-317 - Arm Server Ready Program
 
HKG18-312 - CMSIS-NN
HKG18-312 - CMSIS-NNHKG18-312 - CMSIS-NN
HKG18-312 - CMSIS-NN
 
HKG18-301 - Dramatically Accelerate 96Board Software via an FPGA with Integra...
HKG18-301 - Dramatically Accelerate 96Board Software via an FPGA with Integra...HKG18-301 - Dramatically Accelerate 96Board Software via an FPGA with Integra...
HKG18-301 - Dramatically Accelerate 96Board Software via an FPGA with Integra...
 
HKG18-300K2 - Keynote: Tomas Evensen - All Programmable SoCs? – Platforms to ...
HKG18-300K2 - Keynote: Tomas Evensen - All Programmable SoCs? – Platforms to ...HKG18-300K2 - Keynote: Tomas Evensen - All Programmable SoCs? – Platforms to ...
HKG18-300K2 - Keynote: Tomas Evensen - All Programmable SoCs? – Platforms to ...
 
HKG18-212 - Trusted Firmware M: Introduction
HKG18-212 - Trusted Firmware M: IntroductionHKG18-212 - Trusted Firmware M: Introduction
HKG18-212 - Trusted Firmware M: Introduction
 
HKG18-116 - RAS Solutions for Arm64 Servers
HKG18-116 - RAS Solutions for Arm64 ServersHKG18-116 - RAS Solutions for Arm64 Servers
HKG18-116 - RAS Solutions for Arm64 Servers
 

Dernier

+971581248768>> SAFE AND ORIGINAL ABORTION PILLS FOR SALE IN DUBAI AND ABUDHA...
+971581248768>> SAFE AND ORIGINAL ABORTION PILLS FOR SALE IN DUBAI AND ABUDHA...+971581248768>> SAFE AND ORIGINAL ABORTION PILLS FOR SALE IN DUBAI AND ABUDHA...
+971581248768>> SAFE AND ORIGINAL ABORTION PILLS FOR SALE IN DUBAI AND ABUDHA...
?#DUbAI#??##{{(☎️+971_581248768%)**%*]'#abortion pills for sale in dubai@
 

Dernier (20)

Developing An App To Navigate The Roads of Brazil
Developing An App To Navigate The Roads of BrazilDeveloping An App To Navigate The Roads of Brazil
Developing An App To Navigate The Roads of Brazil
 
How to Troubleshoot Apps for the Modern Connected Worker
How to Troubleshoot Apps for the Modern Connected WorkerHow to Troubleshoot Apps for the Modern Connected Worker
How to Troubleshoot Apps for the Modern Connected Worker
 
Apidays Singapore 2024 - Building Digital Trust in a Digital Economy by Veron...
Apidays Singapore 2024 - Building Digital Trust in a Digital Economy by Veron...Apidays Singapore 2024 - Building Digital Trust in a Digital Economy by Veron...
Apidays Singapore 2024 - Building Digital Trust in a Digital Economy by Veron...
 
Strategies for Unlocking Knowledge Management in Microsoft 365 in the Copilot...
Strategies for Unlocking Knowledge Management in Microsoft 365 in the Copilot...Strategies for Unlocking Knowledge Management in Microsoft 365 in the Copilot...
Strategies for Unlocking Knowledge Management in Microsoft 365 in the Copilot...
 
Axa Assurance Maroc - Insurer Innovation Award 2024
Axa Assurance Maroc - Insurer Innovation Award 2024Axa Assurance Maroc - Insurer Innovation Award 2024
Axa Assurance Maroc - Insurer Innovation Award 2024
 
Finology Group – Insurtech Innovation Award 2024
Finology Group – Insurtech Innovation Award 2024Finology Group – Insurtech Innovation Award 2024
Finology Group – Insurtech Innovation Award 2024
 
TrustArc Webinar - Unlock the Power of AI-Driven Data Discovery
TrustArc Webinar - Unlock the Power of AI-Driven Data DiscoveryTrustArc Webinar - Unlock the Power of AI-Driven Data Discovery
TrustArc Webinar - Unlock the Power of AI-Driven Data Discovery
 
Automating Google Workspace (GWS) & more with Apps Script
Automating Google Workspace (GWS) & more with Apps ScriptAutomating Google Workspace (GWS) & more with Apps Script
Automating Google Workspace (GWS) & more with Apps Script
 
Driving Behavioral Change for Information Management through Data-Driven Gree...
Driving Behavioral Change for Information Management through Data-Driven Gree...Driving Behavioral Change for Information Management through Data-Driven Gree...
Driving Behavioral Change for Information Management through Data-Driven Gree...
 
Strategies for Landing an Oracle DBA Job as a Fresher
Strategies for Landing an Oracle DBA Job as a FresherStrategies for Landing an Oracle DBA Job as a Fresher
Strategies for Landing an Oracle DBA Job as a Fresher
 
Workshop - Best of Both Worlds_ Combine KG and Vector search for enhanced R...
Workshop - Best of Both Worlds_ Combine  KG and Vector search for  enhanced R...Workshop - Best of Both Worlds_ Combine  KG and Vector search for  enhanced R...
Workshop - Best of Both Worlds_ Combine KG and Vector search for enhanced R...
 
Apidays New York 2024 - Scaling API-first by Ian Reasor and Radu Cotescu, Adobe
Apidays New York 2024 - Scaling API-first by Ian Reasor and Radu Cotescu, AdobeApidays New York 2024 - Scaling API-first by Ian Reasor and Radu Cotescu, Adobe
Apidays New York 2024 - Scaling API-first by Ian Reasor and Radu Cotescu, Adobe
 
A Year of the Servo Reboot: Where Are We Now?
A Year of the Servo Reboot: Where Are We Now?A Year of the Servo Reboot: Where Are We Now?
A Year of the Servo Reboot: Where Are We Now?
 
Boost PC performance: How more available memory can improve productivity
Boost PC performance: How more available memory can improve productivityBoost PC performance: How more available memory can improve productivity
Boost PC performance: How more available memory can improve productivity
 
🐬 The future of MySQL is Postgres 🐘
🐬  The future of MySQL is Postgres   🐘🐬  The future of MySQL is Postgres   🐘
🐬 The future of MySQL is Postgres 🐘
 
TrustArc Webinar - Stay Ahead of US State Data Privacy Law Developments
TrustArc Webinar - Stay Ahead of US State Data Privacy Law DevelopmentsTrustArc Webinar - Stay Ahead of US State Data Privacy Law Developments
TrustArc Webinar - Stay Ahead of US State Data Privacy Law Developments
 
Boost Fertility New Invention Ups Success Rates.pdf
Boost Fertility New Invention Ups Success Rates.pdfBoost Fertility New Invention Ups Success Rates.pdf
Boost Fertility New Invention Ups Success Rates.pdf
 
HTML Injection Attacks: Impact and Mitigation Strategies
HTML Injection Attacks: Impact and Mitigation StrategiesHTML Injection Attacks: Impact and Mitigation Strategies
HTML Injection Attacks: Impact and Mitigation Strategies
 
Exploring the Future Potential of AI-Enabled Smartphone Processors
Exploring the Future Potential of AI-Enabled Smartphone ProcessorsExploring the Future Potential of AI-Enabled Smartphone Processors
Exploring the Future Potential of AI-Enabled Smartphone Processors
 
+971581248768>> SAFE AND ORIGINAL ABORTION PILLS FOR SALE IN DUBAI AND ABUDHA...
+971581248768>> SAFE AND ORIGINAL ABORTION PILLS FOR SALE IN DUBAI AND ABUDHA...+971581248768>> SAFE AND ORIGINAL ABORTION PILLS FOR SALE IN DUBAI AND ABUDHA...
+971581248768>> SAFE AND ORIGINAL ABORTION PILLS FOR SALE IN DUBAI AND ABUDHA...
 

LCA13: BOF Reliability Accessibility and Serviceability (RAS)

  • 1. Group photograph at Linaro Connect in Copenhagen Monday 29 Oct 2012 LCA13, March 6, 2013 Robert Richter <robert.richter@calxeda.com> BOF Reliability Accessibility and Serviceability (RAS)
  • 3. www.linaro.org Existing subsystems and tools • mcelog (http://www.mcelog.org/) • EDAC drivers • generic tracepoint: trace_mce_record() (implemented only on x86) • some other arch specific kernel implementations (alpha, powerpc, sparc)
  • 4. www.linaro.org mcelog • x86 shared kernel mce code for Intel and AMD ● nmi handler ● trace point ● MCE device (/dev/mce) for Intel ● AMD driver only logs to console • buffers not mmap'ed • mcelog tool works only for Intel
  • 5. www.linaro.org EDAC drivers • many separate drivers available • unified sysfs layout • edac-util (using sysfs) • memory only, no other events (cpu, io, power, etc.) • polls only sysfs, not event driven
  • 6. www.linaro.org Tracepoints • trace_mce_record() • include/trace/events/mce.h • perf_event subsystem is used as kernel/user i/f • currently only x86 kernel implementation • usable for other archs since tracepoints are generic in the kernel
  • 7. www.linaro.org Implementing RAS for ARM • mcelog not suitable: maintained and developed by Intel only • edac: memory errors only, bunch of individual drivers • only arch dependent RAS solutions exist Add another RAS for ARM? No, let's implement an arch independent RAS solution for Linux.
  • 8. www.linaro.org RAS daemon • follow a proposal by Borislav Petkov of a generic approach for a RAS daemon • patch set, not yet upstream: https://lkml.org/lkml/2011/4/23/72 • implement a generic and arch independent daemon • use tracepoints and the perf_event subsystem to collect events in a kernel ringbuffer • reuse perf_event userland to access the event buffers • add a RAS daemon to tools/ of the kernel repository • do a reference implementation for x86 and arm
  • 9. www.linaro.org RAS daemon - Advantages • generic approach • reuse of existing code (esp. perf code) • event-driven and mmap'ed buffers • supported by the kernel community, x86 maintainers seem to like it • standard and flexible framework allows easily adding features by the kernel community (same as for perf)
  • 10. www.linaro.org RAS daemon - Work to do • start with memory error counting (ECC) • kernel: ● add persistent events to kernel: – always enabled since early boot – handle multiple users of event buffers ● add machine check drivers for ARM • userland ● sharing code in tools/perf needs some rework ● implement initial version of a RAS daemon with basic feature set (logging and statistic) ● define and add more features