shared-public-infra/docs/epyc.md

# epyc

```
System:    Host: epyc Kernel: 6.7.7 x86_64 bits: 64 compiler: gcc v: 12.3.0 
           parameters: initrd=\efi\nixos\48dkb2vcxwmxxfk7wpl0qx884ibz5gk5-initrd-linux-6.7.7-initrd.efi 
           init=/nix/store/vz6r23gya5q3b8lr1yiadkv6h5lcjmmz-nixos-system-epyc-23.11pre-git/init 
           console=tty0 console=ttyS0,115200 pci=realloc console=ttyS1,115200n8 console=tty1 
           loglevel=4 
           Console: N/A Distro: NixOS 23.11 (Tapir) 
Machine:   Type: Server System: Supermicro product: Super Server v: 0123456789 serial: 0123456789 
           Chassis: type: 17 v: 0123456789 serial: 0123456789 
           Mobo: Supermicro model: H12SSL-i v: 1.01 serial: WM21AS601818 UEFI: American Megatrends 
           v: 2.4 date: 04/14/2022 
Memory:    RAM: total: 251.54 GiB used: 4.56 GiB (1.8%) 
           Array-1: capacity: 4 TiB note: check slots: 8 EC: Multi-bit ECC 
           max-module-size: 512 GiB note: est. 
           Device-1: DIMMA1 size: 64 GiB speed: 3200 MT/s type: DDR4 
           detail: synchronous registered (buffered) bus-width: 64 bits total: 72 bits 
           manufacturer: Samsung part-no: M393A8G40AB2-CWE serial: H0S100013847D8748B 
           Device-2: DIMMB1 size: 64 GiB speed: 3200 MT/s type: DDR4 
           detail: synchronous registered (buffered) bus-width: 64 bits total: 72 bits 
           manufacturer: Samsung part-no: M393A8G40AB2-CWE serial: H0MK00013847D79D40 
           Device-3: DIMMC1 size: 64 GiB speed: 3200 MT/s type: DDR4 
           detail: synchronous registered (buffered) bus-width: 64 bits total: 72 bits 
           manufacturer: Samsung part-no: M393A8G40AB2-CWE serial: Y10R120249249E38E1 
           Device-4: DIMMD1 size: 64 GiB speed: 3200 MT/s type: DDR4 
           detail: synchronous registered (buffered) bus-width: 64 bits total: 72 bits 
           manufacturer: Samsung part-no: M393A8G40AB2-CWE serial: Y10R120249249E38E8 
           Device-5: DIMME1 size: No Module Installed 
           Device-6: DIMMF1 size: No Module Installed 
           Device-7: DIMMG1 size: No Module Installed 
           Device-8: DIMMH1 size: No Module Installed 
PCI Slots: Slot: 1 type: x16 PCI Express 4 x16 CPU SLOT1 PCI-E 4.0 X16 status: Available 
           length: Long 
           Slot: 2 type: x8 PCI Express 4 x8 CPU SLOT2 PCI-E 4.0 X8 status: Available length: Long 
           Slot: 3 type: x16 PCI Express 4 x16 CPU SLOT3 PCI-E 4.0 X16 status: Available 
           length: Long 
           Slot: 4 type: x8 PCI Express 4 x8 CPU SLOT4 PCI-E 4.0 X8 status: Available length: Long 
           Slot: 5 type: x16 PCI Express 4 x16 CPU SLOT5 PCI-E 4.0 X16 status: Available 
           length: Long 
           Slot: 6 type: x16 PCI Express 4 x16 CPU SLOT6 PCI-E 4.0 X16 status: Available 
           length: Long 
           Slot: 7 type: x16 PCI Express 4 x16 CPU SLOT7 PCI-E 4.0 X16 status: Available 
           length: Long 
           Slot: N/A type: x4 M.2 Socket 3 PCI-E M.2-M1 status: Available length: Short 
           Slot: N/A type: x4 M.2 Socket 3 PCI-E M.2-M2 status: Available length: Short 
CPU:       Info: 64-Core model: AMD EPYC 7763 socket: SP3 bits: 64 type: MT MCP arch: Zen 3 
           family: 19 (25) model-id: 1 stepping: 1 microcode: A0011D3 cache: L1: 4 MiB L2: 32 MiB 
           L3: 256 MiB 
           flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm bogomips: 627200 
           Speed: 2450 MHz min/max: 1500/2450 MHz base/boost: 2450/3525 boost: enabled 
           volts: 1.1 V ext-clock: 100 MHz Core speeds (MHz): 1: 2450 2: 2450 3: 2450 4: 2450 
           5: 2450 6: 2450 7: 2450 8: 2450 9: 2450 10: 2450 11: 2450 12: 2450 13: 2450 14: 2450 
           15: 2450 16: 2450 17: 2450 18: 2450 19: 2450 20: 2450 21: 2450 22: 2450 23: 2450 
           24: 2450 25: 2450 26: 2450 27: 2450 28: 2450 29: 2450 30: 2450 31: 2450 32: 2450 
           33: 2450 34: 2450 35: 2450 36: 2450 37: 2450 38: 2450 39: 2450 40: 2450 41: 2450 
           42: 2450 43: 2450 44: 2450 45: 3525 46: 2450 47: 2450 48: 2450 49: 2450 50: 2450 
           51: 2450 52: 2450 53: 2450 54: 2450 55: 2450 56: 2450 57: 2450 58: 2450 59: 2450 
           60: 2450 61: 2450 62: 2450 63: 2450 64: 2450 65: 2450 66: 2450 67: 2450 68: 2450 
           69: 2450 70: 2450 71: 2450 72: 2450 73: 2450 74: 2450 75: 2450 76: 2450 77: 2450 
           78: 2450 79: 2450 80: 2450 81: 2450 82: 2450 83: 2450 84: 2450 85: 2450 86: 2450 
           87: 2450 88: 2450 89: 2450 90: 2450 91: 2450 92: 2450 93: 2450 94: 2450 95: 2450 
           96: 2450 97: 2450 98: 2450 99: 2450 100: 2450 101: 2450 102: 2450 103: 2450 104: 2450 
           105: 2450 106: 2450 107: 2450 108: 2450 109: 2450 110: 2450 111: 2450 112: 2450 
           113: 2450 114: 2450 115: 2450 116: 2450 117: 2450 118: 2450 119: 2450 120: 2450 
           121: 2450 122: 2450 123: 2450 124: 2450 125: 2450 126: 2450 127: 2450 128: 2450 
           Vulnerabilities: Type: gather_data_sampling status: Not affected 
           Type: itlb_multihit status: Not affected 
           Type: l1tf status: Not affected 
           Type: mds status: Not affected 
           Type: meltdown status: Not affected 
           Type: mmio_stale_data status: Not affected 
           Type: retbleed status: Not affected 
           Type: spec_rstack_overflow mitigation: Safe RET 
           Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via prctl 
           Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer sanitization 
           Type: spectre_v2 mitigation: Retpolines, IBPB: conditional, IBRS_FW, STIBP: always-on, 
           RSB filling, PBRSB-eIBRS: Not affected 
           Type: srbds status: Not affected 
           Type: tsx_async_abort status: Not affected 
Graphics:  Device-1: ASPEED Graphics Family vendor: Super Micro H12SSL-i driver: ast v: kernel 
           bus-ID: 45:00.0 chip-ID: 1a03:2000 class-ID: 0300 
           Display: server: No display server data found. Headless machine? tty: N/A 
           Message: Advanced graphics data unavailable in console for root. 
Audio:     Message: No device data found. 
Network:   Device-1: Broadcom NetXtreme BCM5720 Gigabit Ethernet PCIe vendor: Super Micro H12SSL-i 
           driver: tg3 v: kernel port: N/A bus-ID: 47:00.0 chip-ID: 14e4:165f class-ID: 0200 
           IF: nat-lan state: up speed: 1000 Mbps duplex: full mac: 3c:ec:ef:7e:bd:c8 
           IP v4: 10.32.65.13/20 type: dynamic scope: global 
           IP v6: fe80::3eec:efff:fe7e:bdc8/64 virtual: proto kernel_ll scope: link 
           Device-2: Broadcom NetXtreme BCM5720 Gigabit Ethernet PCIe vendor: Super Micro H12SSL-i 
           driver: tg3 v: kernel port: N/A bus-ID: 47:00.1 chip-ID: 14e4:165f class-ID: 0200 
           IF: wan state: up speed: 1000 Mbps duplex: full mac: 3c:ec:ef:7e:bd:c9 
           IP v6: 2001:bc8:38ee:100::500/128 scope: global 
           IP v6: fe80::3eec:efff:fe7e:bdc9/64 virtual: proto kernel_ll scope: link 
           IF-ID-1: enp73s0f3u1u2c2 state: down mac: be:3a:f2:b6:05:9f 
           WAN IP: 82.65.118.1 
Bluetooth: Device-1: Insyde RNDIS/Ethernet Gadget type: USB driver: rndis_host v: kernel 
           bus-ID: 7-1.2:4 chip-ID: 0b1f:03ee class-ID: 0a00 
           Report: This feature requires one of these tools: hciconfig/bt-adapter 
Drives:    Local Storage: total: 9.82 TiB used: 1.06 TiB (10.7%) 
           ID-1: /dev/nvme0n1 maj-min: 259:2 vendor: Samsung model: MZWLJ7T6HALA-00AU3 
           size: 6.19 TiB block-size: physical: 512 B logical: 512 B rotation: SSD 
           serial: S5RTNG0T110589 rev: EPK96R5Q temp: 40 Celsius C scheme: GPT 
           SMART: yes health: PASSED on: 273d 5h cycles: 113 read-units: 192,543,495 [98.5 TB] 
           written-units: 258,494,659 [132 TB] 
           ID-2: /dev/nvme1n1 maj-min: 259:0 vendor: Intel model: SSDPE2KX040T8 size: 3.64 TiB 
           block-size: physical: 512 B logical: 512 B speed: 31.6 Gb/s lanes: 4 rotation: SSD 
           serial: PHLJ940301WZ4P0DGN rev: VDV10131 temp: 33 Celsius C 
           SMART: yes health: PASSED on: 2y 188d 9h cycles: 36 read-units: 9,478,214,631 [4.85 PB] 
           written-units: 9,225,614,032 [4.72 PB] 
Partition: ID-1: / raw-size: 6.18 TiB size: 6.18 TiB (100.00%) used: 1.06 TiB (17.1%) fs: btrfs 
           block-size: 4096 B dev: /dev/dm-0 maj-min: 254:0 mapped: nixroot 
           ID-2: /boot raw-size: 1023 MiB size: 1021 MiB (99.80%) used: 23.9 MiB (2.3%) fs: vfat 
           block-size: 512 B dev: /dev/nvme0n1p1 maj-min: 259:3 
Swap:      Kernel: swappiness: 60 (default) cache-pressure: 100 (default) 
           ID-1: swap-1 type: partition size: 8 GiB used: 0 KiB (0.0%) priority: -2 
           dev: /dev/nvme0n1p2 maj-min: 259:4 
Sensors:   Message: No ipmi sensor data found. 
           Message: No sensor data found. Is lm-sensors configured? 
Info:      Processes: 1226 Uptime: N/A wakeups: 0 Init: systemd v: 254 target: multi-user.target 
           tool: systemctl Compilers: gcc: 12.3.0 Packages: nix-default: 0 nix-sys: 415 lib: 65 
           nix-usr: 0 Client: Sudo v: 1.9.15p2 inxi: 3.3.04 
```
![hardware topology](epyc.lstopo.svg)