Merge pull request #2182 from Kobzol/update-runner-docs

Update benchmarking server specs

Author: Kobzol

docs/perf-runner.md

@@ -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`.
@@ -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.