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Update benchmarking server specs #2182

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109 changes: 72 additions & 37 deletions docs/perf-runner.md
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Original file line number Diff line number Diff line change
@@ -1,53 +1,88 @@
# CI benchmarking machine
The machine that actually executes the benchmarks in CI has the following configuration.
# Benchmarking machine
The machine that actually executes the benchmarks is the `AX-42` server running on [Hetzner](https://www.hetzner.com/dedicated-rootserver/). It has the following configuration.

## Hardware
- 6-core AMD Ryzen 5 3600 with HyperThreading (12 hardware threads total)
- 8-core AMD Ryzen 7 PRO 8700GE with HyperThreading (16 hardware threads total)
<details>
<summary>Output of `lscpu`</summary>

```
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 12
On-line CPU(s) list: 0-11
Thread(s) per core: 2
Core(s) per socket: 6
Socket(s): 1
NUMA node(s): 1
Vendor ID: AuthenticAMD
CPU family: 23
Model: 113
Model name: AMD Ryzen 5 3600 6-Core Processor
Stepping: 0
CPU MHz: 3819.020
CPU max MHz: 3600.0000
CPU min MHz: 2200.0000
BogoMIPS: 7186.58
Virtualization: AMD-V
L1d cache: 32K
L1i cache: 32K
L2 cache: 512K
L3 cache: 16384K
NUMA node0 CPU(s): 0-11
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 constant_tsc rep_good nopl xtopology nonstop_tsc cpuid extd_apicid aperfmperf pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate sme ssbd ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf xsaveerptr arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif umip rdpid overflow_recov succor smca
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Address sizes: 48 bits physical, 48 bits virtual
Byte Order: Little Endian
CPU(s): 16
On-line CPU(s) list: 0-7
Off-line CPU(s) list: 8-15
Vendor ID: AuthenticAMD
Model name: AMD Ryzen 7 PRO 8700GE w/ Radeon 780M Graphics
CPU family: 25
Model: 117
Thread(s) per core: 1
Core(s) per socket: 8
Socket(s): 1
Stepping: 2
CPU(s) scaling MHz: 88%
CPU max MHz: 5184.0000
CPU min MHz: 0.0000
BogoMIPS: 7300.19
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 cl
flush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm co
nstant_tsc rep_good amd_lbr_v2 nopl nonstop_tsc cpuid extd_apicid aperfmpe
rf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt ae
s xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4
a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core p
erfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate ssbd mba pe
rfmon_v2 ibrs ibpb stibp ibrs_enhanced vmmcall fsgsbase bmi1 avx2 smep bmi
2 erms invpcid cqm rdt_a avx512f avx512dq rdseed adx smap avx512ifma clflu
shopt clwb avx512cd sha_ni avx512bw avx512vl xsaveopt xsavec xgetbv1 xsave
s cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local user_shstk avx512_bf16
clzero irperf xsaveerptr rdpru wbnoinvd cppc arat npt lbrv svm_lock nrip_
save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshol
d avic vgif x2avic v_spec_ctrl vnmi avx512vbmi umip pku ospke avx512_vbmi2
gfni vaes vpclmulqdq avx512_vnni avx512_bitalg avx512_vpopcntdq rdpid ove
rflow_recov succor smca fsrm flush_l1d
Virtualization features:
Virtualization: AMD-V
Caches (sum of all):
L1d: 256 KiB (8 instances)
L1i: 256 KiB (8 instances)
L2: 8 MiB (8 instances)
L3: 16 MiB (1 instance)
NUMA:
NUMA node(s): 1
NUMA node0 CPU(s): 0-7
Vulnerabilities:
Gather data sampling: Not affected
Itlb multihit: Not affected
L1tf: Not affected
Mds: Not affected
Meltdown: Not affected
Mmio stale data: Not affected
Reg file data sampling: Not affected
Retbleed: Not affected
Spec rstack overflow: Mitigation; Safe RET
Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl
Spectre v1: Mitigation; usercopy/swapgs barriers and __user pointer sanitization
Spectre v2: Mitigation; Enhanced / Automatic IBRS; IBPB conditional; STIBP always-on;
RSB filling; PBRSB-eIBRS Not affected; BHI Not affected
Srbds: Not affected
Tsx async abort: Not affected
```

</details>
- 64 GiB RAM, 32 GiB of swap
- 64 GiB RAM, swap disabled

## Software
- Kernel: `4.15.0-191-generic`
- OS: Ubuntu `18.04`
- Kernel: `6.8.0-60-generic`
- OS: Ubuntu `24.04`

## Configuration
### HyperThreading & Turboboost
As of November 2022, both are disabled.

Prior to October 2022, both were enabled. During October 2022 some
[experimentation](https://github.com/rust-lang/rustc-perf/issues/1450) was done
which found that disabling both reduced variance significantly.
The machine is configured via [this](https://github.com/rust-lang/simpleinfra/blob/master/ansible/playbooks/rustc-perf.yml) Ansible script.

### HyperThreading & Turboboost
Both are disabled.

### CPU scaling
Scaling governor set to `performance`.
Expand All @@ -62,4 +97,4 @@ Note that ASLR is also
Disabled with `kernel.nmi_watchdog=0` in `sysctl.conf`.

### Swap
`vm.swappiness` set to `60`.
`vm.swappiness` set to `10`. Swap is disabled anyway though.
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