AVX Support in your VPS/Server

[Neiluj]

Going by the output of the "cat | grep" command, Cloud VPS from SSDnodes has AVX support.

[humptydumpty]

Contabo VPS L (AMD EPYC 7282)

flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm rep_good nopl cpuid extd_apicid tsc_known_freq pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm cmp_legacy cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw perfctr_core ssbd ibrs ibpb stibp vmmcall fsgsbase tsc_adjust bmi1 avx2 smep bmi2 rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves clzero xsaveerptr wbnoinvd arat umip rdpid arch_capabilities

Home server (Intel i5-6500T)

flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb invpcid_single pti ssbd ibrs ibpb stibp fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid mpx rdseed adx smap clflushopt intel_pt xsaveopt xsavec xgetbv1 xsaves dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp md_clear flush_l1d arch_capabilities

BTW, is there anything I need to do?

[luckow]

next output from

a netcup RS 4000 SAS G8SE:

flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave **avx** f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault invpcid_single pti ssbd ibrs ibpb stibp fsgsbase tsc_adjust bmi1 hle **avx2** smep bmi2 erms invpcid rtm mpx **avx512f** **avx512dq** rdseed adx smap clflushopt clwb **avx512cd** **avx512bw** **avx512vl** xsaveopt xsavec xgetbv1 xsaves arat umip pku ospke md_clear

a netcup RS 2000 SSD G8

flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave **avx** f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault invpcid_single ssbd ibrs ibpb stibp ibrs_enhanced fsgsbase tsc_adjust bmi1 hle **avx2** smep bmi2 erms invpcid rtm mpx **avx512f** **avx512dq** rdseed adx smap clflushopt clwb **avx512cd** **avx512bw** **avx512vl** xsaveopt xsavec xgetbv1 xsaves arat umip pku ospke **avx512_vnni** md_clear arch_capabilities

a netcup RS 2000 G9

flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm rep_good nopl cpuid extd_apicid tsc_known_freq pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave **avx** f16c rdrand hypervisor lahf_lm cmp_legacy cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw perfctr_core ssbd ibrs ibpb stibp vmmcall fsgsbase tsc_adjust bmi1 **avx2** smep bmi2 rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves clzero xsaveerptr wbnoinvd arat umip rdpid arch_capabilities

[malvim]

Kimsufi server over here, no avx support

[subven]

@girish said in AVX Support in your VPS/Server:

My Netcup server doesn't have AVX.

Netcup RS4000

root@my:~# cat /proc/cpuinfo | grep -i avx
flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm rep_good nopl cpuid extd_apicid tsc_known_freq pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm cmp_legacy cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw perfctr_core ssbd ibrs ibpb stibp vmmcall fsgsbase tsc_adjust bmi1 avx2 smep bmi2 rdseed adx smap clflushopt 
clwb sha_ni xsaveopt xsavec xgetbv1 xsaves clzero xsaveerptr wbnoinvd arat umip rdpid arch_capabilities

[imc67]

@girish said in AVX Support in your VPS/Server:

https://github.com/docker-library/mongo/issues/485

NetCup VPS 3000 G9: no AVX support
NetCup RS 8000 G9: AVX support
NetCup RS 4000 G9: AVX support

[NoLooseEnds]

Registered to chime in, I have netcup VPS 2000 G9

flags           : fpu de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx lm nopl cpuid tsc_known_freq pni pclmulqdq ssse3 cx16 sse4_1 sse4_2 x2apic popcnt aes xsave rdrand hypervisor lahf_lm cmp_legacy 3dnowprefetch ssbd ibpb vmmcall

So no avx.

EDIT: Sent a request to support about it.

[hcj-online]

netcup VPS 500 G10s

flags		: fpu de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pse36 clflush mmx fxsr sse sse2 syscall nx lm rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt aes xsave rdrand hypervisor lahf_lm abm cpuid_fault invpcid_single pti ssbd ibrs ibpb invpcid md_clear arch_capabilities

So no AVX.

[privsec]

What does this impact?

I havent noticed any issues

[girish]

@privsec Not currently but this will be a problem when we upgrade the mongodb addon to use Mongo 5.x and beyond. Currently, it is on Mongo 4.4 which is reaching end of life sometime next year.

So, unfortunately, we have no choice but to stop supporting servers which have no AVX when we upgrade Mongo.

[privsec]

@girish said in AVX Support in your VPS/Server:

cat /proc/cpuinfo | grep -i avx

VPS 8000 G9 12M iv No AVX support

[random_eric]

@girish said in AVX Support in your VPS/Server:

cat /proc/cpuinfo | grep -i avx

I have avx on my system.
AVX was launched ~2011 (https://en.wikipedia.org/wiki/Advanced_Vector_Extensions)

If a new system doesn't support avx, it's likely a celeron system or a lower speced system.

[privsec]

Do all Hetzner servers have AVX support?

Id love just one more reason to switch

[robi]

PSA:
Please note that AVX support is only a feature of the CPU generation, not any company or package bundle.

Virtualization platforms may choose to enable/disable CPU features, so there's that too.

[privsec]

@robi #Awesome
OK, thank you.

[nichu42]

For those who are on Windcloud:

The default flags are

fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx lm constant_tsc nopl xtopology cpuid tsc_known_freq pni cx16 x2apic hypervisor lahf_lm cpuid_fault pti

As per support, the following flags can be activated upon request (just open a ticket):

fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault invpcid_single pti ssbd ibrs ibpb stibp fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx avx512f avx512dq rdseed adx smap clflushopt clwb avx512cd avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves arat umip pku ospke arch_capabilities

The change requires a complete shutdown (restart is not enough). I have mentioned that future Cloudron versions will require the AVX flag to be set, so they might change the default setting for new Cloudron VPS orders. But better double-check...

[gsassen]

For my main cloudron, I'm using a netcup VPS which doesn't have AVX extensions. I could change to a bigger RS server there, then I'd be able to use AVX. Would be more expensive though.
At home, I have an Odroid H2 with Proxmox and Synology DS720+, both are using a Celeron J4105 / J4125 which don't have AVX, both are not too old (2 years or so).

When looking around, I noticed that the FreeBSD guys didn't like the AVX requirement as well and compiled recent mongodb versions without avx flag for their ports, maybe that would be an option for cloudron as well?
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=268510

-- Georg

[nebulon]

That might an alternative indeed, if ubuntu provides a ppa without AVX support. I am not sure if we should attempt to build our own mongodb for Cloudron. At least I am not a mongodb expert enough to forsee any potential side-effects

[girish]

I think we will probably implement this in such a way that just mongodb (and mongodb apps) won't run on non-AVX servers. Rest of Cloudron will be usable.

[necrevistonnezr]

For home server users like me: the CPU requirements are quite steep: i3 and up (no power saving - i.e. fanless - Pentium or Celeron) and even then you’re not save (from https://github.com/docker-library/mongo/issues/485#issuecomment-891991814) :

For Intel x86_64, MongoDB requires Sandy Bridge or later.
For AMD x86_64, MongoDB requires Bulldozer or later.

Starting in MongoDB 5.0, mongod, mongos, and the legacy mongo shell no longer support x86_64 platforms which do not meet this minimum microarchitecture requirement.

https://docs.mongodb.com/manual/administration/production-notes/#x86_64

the underling requirement for the MongoDB 5.0 binary server packages is CPUs with AVX instructions. These are broadly Sandy Bridge or newer Intel CPUs, but there is a caveat:

Not all CPUs from the listed families support AVX. Generally, CPUs with the commercial denomination Core i3/i5/i7/i9 support them, whereas Pentium and Celeron CPUs do not.

https://www.mongodb.com/community/forums/t/mongodb-5-0-cpu-intel-g4650-compatibility/116610/2*