VPP/AArch64

Meeting Details

Weekly on Wednesdays, 8-9am PT. FD.io Zoom Meeting room

Join from PC, Mac, Linux, iOS or Android: https://zoom.us/j/5301185804 or https://zoom.us/my/fastdata

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    Meeting ID: 530 118 5804
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IRC Channel

#fdio-arm on freenode.net

FD.io Lab

Platform	Status
SoftIron OverDrive 1000	Arrived - One unit RMA'd. LF RT ticket open to add these machines as Jenkins slaves for CI build jobs.
Huawei TaiShan 2280	Shipping
Marvell MACCHIATObin	Ordering

Build, unit test, packaging

The following is tracked manually until hardware is integrated into upstream FD.io CI

Cmd	Status	timing
`make bootstrap`	OK	0m45
`make build`	OK	11m45
`make build-release`	OK	14m56
`make test`	OK	26m7
`make test-all`	OK	36m15
`make test-debug`	OK	22m32
`make test-all-debug`	OK	33m29

Status on commit: ceb4d05ba0fb9771069b0081b928a9e75401fc87 (Thu Dec 14 09:25:31 2017)

Timing consideration on platform: Hierofalcon with Cortex-A57 & Fedora 26

Might want to have a look at this patch which adds make config: https://gerrit.fd.io/r/#/c/9200/

Also this other patch proposal (probably not as complete) allows to toggle off some parts of the code such as libvom, and therefore allows compilation on small systems: https://gerrit.fd.io/r/#/c/9186/

Distro	Cmd	Status
Fedora 26 (Server Edition)	`make pkg-rpm`	OK
Ubuntu 17.10	`make pkg-deb`	OK
Ubuntu 16.04.3 LTS	`make pkg-deb`	OK

CSIT

https://wiki.fd.io/view/CSIT/AArch64

AArch64 Porting & Tuning

JIRA issues with ARM64 label

Review use of Arm architected timer in src/vppinfra/time.[ch]
- https://gerrit.fd.io/r/#/c/5796/

Review use of __sync_xxx/__atomic_xxx builtins to ensure correct memory ordering on non-TSO machines.

Investigate memcpy performance (src/vppinfra/string.h); both inlined-by-compiler and libc versions.

Investigate dual/quad loop tuning, e.g. l2_forward().

SIMD

CLIB_HAVE_VEC128 also covers 256-bit. Add CLIB_HAVE_VEC256?
ixge.[ch] - 128-bit vector types with plain C. Needs to be enabled.
mheap.c - requires NEON implementation of is_equal
hash.h - requires NEON implementation of irotate
vnet_classify.h - 128-bit vector types with plain C. Needs to be enabled.
vhost-user.c - SSE4.2 only. Implement range search using NEON.
ip4_mtrie.h - 128-bit vector types with plain C. Needs to be enabled.

Known Issues

Compilation may fail on systems with less than 1GB memory per core. One workaround is to search for -j in build-root/Makefile and multiply by 1 instead of 2.

GCC 5.3.x ICEs during FP register allocation. Please use GCC 5.4+.

Try disabling ASLR if experiencing random crashes: sysctl -w kernel.randomize_va_space=0

Recent Patches

show cpu microarchitecture		https://gerrit.fd.io/r/#/c/9929/		Gabriel Ganne
more extended tests fixes	Merged 12/16	https://gerrit.fd.io/r/#/c/9880/		Gabriel Ganne
Use crc32 wrapper	Merged 12/16	https://gerrit.fd.io/r/#/c/9854/		Gabriel Ganne
implement clib_smp_pause() for arm and aarch64 platform	Merged 12/15	https://gerrit.fd.io/r/#/c/9820/	VPP-1066	Kevin Wang
make "test-all" target pass again (for all platforms)	Merged 12/13	https://gerrit.fd.io/r/#/c/9702/		Gabriel Ganne
add NEON versions for ethernet_frame_is_tagged()		https://gerrit.fd.io/r/#/c/9749/		Gabriel Ganne
fill "show cpu" Flag list on aarch64 platforms	Merged 12/06	https://gerrit.fd.io/r/#/c/9727/		Gabriel Ganne
remove smp dead code (VPP-1066)	Merged 12/06	https://gerrit.fd.io/r/#/c/9730/		Gabriel Ganne
net/virtio: support modern device id	Merged 11/28	https://gerrit.fd.io/r/#/c/9596/		Gabriel Ganne
armv8 crc32 - fix macro name	Merged 11/15	https://gerrit.fd.io/r/#/c/9418/		Gabriel Ganne
bier - fix node table declaration	Merged 11/14	https://gerrit.fd.io/r/#/c/9413/		Gabriel Ganne
Map SVM regions at a sane offset on arm64	Merged 11/10	https://gerrit.fd.io/r/#/c/9342/		Brian Brooks
bfd tests fix	Merged 11/07	https://gerrit.fd.io/r/#/c/9243/		Gabriel Ganne
debian packaging fix	Merged 11/06	https://gerrit.fd.io/r/#/c/9239/		Gabriel Ganne
lb test fix	Merged 10/31	https://gerrit.fd.io/r/#/c/9067/		Gabriel Ganne
conditional x86intrin.h inclusion	Merged 10/25	https://gerrit.fd.io/r/#/c/8952/		Gabriel Ganne
fix test_lb_ip4_gre6() cleanup (not enough to fix the tests completely)	Merged 10/24	https://gerrit.fd.io/r/#/c/8992/		Gabriel Ganne
null-terminate some formatted string	Merged 10/20	https://gerrit.fd.io/r/#/c/8922/		Gabriel Ganne
lb plugin - fix format() type mismatches	Merged 10/16	https://gerrit.fd.io/r/#/c/8755/		Gabriel Ganne
Use AESNI=y only on x86_64 machines	Merged 10/14	https://gerrit.fd.io/r/#/c/8622/		Brian Brooks
Improved arm64 chip detection	Merged 09/11	https://gerrit.fd.io/r/#/c/8372/		Brian Brooks
Native arm64 build: dpdk/Makefile change	Merged 08/31	https://gerrit.fd.io/r/#/c/8228/		Brian Brooks

Meeting Minutes

1/3/2018

FD.io lab
- One OD1000 sent for RMA
- Huawei PO sent out
- Cavium PO sent out (?)
VPP
- Gabriel working on patch for "show cpu" to display MIDR as human readable
- Nitin sent preliminary patch for vhost-user NEON impl
  - Seeing perf differences on different cores; tradeoff is single-threaded perf vs. NEON
- Kumar built and unit test successfully on D03
- Nitin to resume patch for supporting different cache line sizes for the same arch
CSIT
- Gabriel cleaned up WIP patch; ready for review
- Kumar starting CSIT func tests with Ubuntu VMs
  - Scripts for running on dedicated hardware need to be modified, e.g. PCIe resources
- Kumar to send doc on testing
Performance
- Kumar to start thread on performance testing
AIs
- Brian: Check with Tina on shipping and open LF RT ticket once they have arrived
- Brian: Need a way to choose either SW or NEON impl based on chip
- Gabriel: Create list of broken CSIT tests for 2-node topology

12/20/2017

No meeting next week - Dec 27

FD.io lab
- OD1000s - build only
  - 1 of 3 needs to be RMAd
  - Can these be up in time to show 'make test' passes on ARM for 18.01 release report?
- TaiShan
  - PO in progress
- ThunderX - build only
  - PO went out
VPP
- Patches / JIRAs
  - Patch for extended test failure, but still more (new) extended test failures - Gabriel
  - Nitin to post vhost-user.c changes for NEON
    - Nitin will finish Gabriel's original NEON patch to add CLIB_HAVE_VEC_128
- Can we share code on Github e.g. NEON perf tests?
CSIT
- Leading question: How many CSIT test cases are passing/failing?
- Environment issues preventing running through all CSIT test cases; Gabriel needs dedicated machines or more RAM
- Cavium & Huawei will join Gabriel in CSIT replication on ARM hardware next week
  - Cavium previously ran vhost test cases manually, now moving to CSIT

12/13/2017

VPP
- Quick overview of work items
- Waiting to hear back from LF about OD1000 connectivity
  - Changes needed to ci-mgmt
CSIT
- Starting to reproduce CSIT on x86 and ARM (with Gabriel's WIP patch)
  - Some issues with environment variables (perf tests on 2-node)
- Need Nexus to support aarch64 packages
  - Need a contact for Nexus
Share known issues on wiki!
Request CSIT 'deep dive'

12/06/2017

Can we access the OD1000 in csit lab ?
- currently mainly working with VMs
added dedicated wiki page for CSIT : https://wiki.fd.io/view/CSIT/AArch64
WIP : https://gerrit.fd.io/r/#/c/9474/

11/29/2017

VPP
- vhost-user.c - SSE4.2 only. Implement range search using NEON. (nitin)
- OD1000 status ?
  - build only
  - can we access them ?
  - what wan we do to help in general ?
- x86 intrinsic review
- build VPP on ARM VM on x86
CSIT
- what platforms wil lbe made available

11/22/2017

VPP CI
- 3 ThunderX for Chrismas
CSIT
- func on VM vs perfs on HW
- func on x86 VMs OK with 2 nodes
- DPDK integration WIP : https://gerrit.fd.io/r/#/c/9474/
- issues
  - how to access the lab ?
Next steps
- VPP
- CSIT
  - structure work & send email (Gabriel)
  - is xxhash vs crc32 finished ? (Gabriel)
  - ask Maciek & setup a presentation meeting with someone from CSIT (Tina)
  - find a time to reschedule this meeting before the CSIT weekly call (Brian)

11/15/2017

VPP upstream status
- build && build-release OK
- "make test" && "make test-debug" OK
- packaging:
  - Ubuntu 16.04 OK
  - Ubuntu 17.10 ? (TBC)
  - fedora-26 OK
vpp continuous test
- all task required for jenkin's "verify" job are ready
- TODO: request gerrit hook to Dave Barachs / vpp-dev (NB & GG)
- set up ci in fdio lab
CSIT
- setting up env
- ThunderX platforms should arrive this week
- csit work sharing

11/8/2017

Unit tests
- Tests pass except for random initialization failures
- Need to hear back from upstream about Extended unit tests
Should we run plugins such as NSH SFC?
Hardware to lab
- Huawei h/w stalled
- 3x ThunderX shipping to FD.io lab
CSIT replication
- Cavium replicating on ThunderX2; getting started
Let's track our work in Jira; Brian to migrate tasks to Jira

10/25/2017

Gabriel working on vpp init failure in linux_pci_init()
Kumar to check with GeorgeZ on Huawei boards shipped to CSIT; need to verify tests also on this environment (package versions from distro)
Brian to check whether anything else needs to be done besides 'make test' for upstream enablement

VPP/AArch64

Contents

Meeting Details

IRC Channel

FD.io Lab

Build, unit test, packaging

CSIT

AArch64 Porting & Tuning

Known Issues

Recent Patches

Meeting Minutes

1/3/2018

12/20/2017

12/13/2017

12/06/2017

11/29/2017

11/22/2017

11/15/2017

11/8/2017

10/25/2017

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