1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
# rmtop - GPU htop Equivalent
> **Status: planned / not implemented.** There is no `tools/rmtop/` directory
> or build target today. The implemented RM-API tooling is the `rmq` subset
> (`tools/rmq/`, the host RM-API oracle); treat this page as a design sketch,
> not a user guide. See [tools/README.md](README.md).
## Overview
`rmtop` is an interactive, ncurses-based real-time GPU monitoring dashboard. Like `htop` but for NVIDIA GPUs, providing live visualization of engine utilization, memory, channels, power, thermals, and GSP-RM telemetry.
## Source Code Reuse
Same recycled components as `rmtool`:
- `gpumon_perfmon` - sampling infrastructure, perfmon counters
- `nvidia-smi` - GPU enumeration, NVML-style queries
- `nv2080` - direct RM control for real-time state
- `resserve` - resource server state
- `resman` - resource manager heaps/clients
## UI Layout
```
┌─────────────────────────────────────────────────────────────────────────────┐
│ rmtop 1.0 │ GPU 0: RTX 5090 (GB202) │ Driver: 610.XX │ 14:32:15 │
├─────────────────────────────────────────────────────────────────────────────┤
│ ENGINES │ UTIL │ FREQ │ POWER │ TEMP │ ACTIVE CHANNELS │
│ ├─ GR (Graphics) │ ████████░░ 82% │ 2850MHz │ 320W │ 78°C │ ch: 0,3,7,12 │
│ ├─ CE0 (Copy) │ ████░░░░░░ 41% │ 2100MHz │ │ │ ch: 1,4 │
│ ├─ CE1 (Copy) │ ░░░░░░░░░░ 0% │ 300MHz │ │ │ - │
│ ├─ NVDEC0 │ ██████████ 100% │ 1800MHz │ │ │ ch: 2 │
│ ├─ NVDEC1 │ ░░░░░░░░░░ 0% │ 300MHz │ │ │ - │
│ ├─ NVENC0 │ ████████░░ 82% │ 1800MHz │ │ │ ch: 5 │
│ ├─ NVENC1 │ ░░░░░░░░░░ 0% │ 300MHz │ │ │ - │
│ ├─ NVJPG │ ░░░░░░░░░░ 0% │ 300MHz │ │ │ - │
│ └─ OFA │ ░░░░░░░░░░ 0% │ 300MHz │ │ │ - │
├─────────────────────────────────────────────────────────────────────────────┤
│ MEMORY │ USED │ TOTAL │ FREE │ FRAG │ BAR1 │
│ ├─ VRAM │ 18.2G │ 24.0G │ 5.8G │ 12% │ 256M / 256M │
│ ├─ System RAM │ 4.1G │ 64.0G │ 59.9G │ 3% │ │
│ └─ BAR1 (CPU) │ 12M │ 256M │ 244M │ 1% │ │
├─────────────────────────────────────────────────────────────────────────────┤
│ CHANNELS / CONTEXTS (PID │ ENG │ CTX │ VRAM │ SYSMEM │ UTIL │ STATE) │
│ ├─ 1247 │ GR │ 0x3 │ 2.1G │ 512M │ 82% │ RUNNING │
│ ├─ 1247 │ CE0 │ 0x3 │ 128M │ 64M │ 41% │ RUNNING │
│ ├─ 1247 │ DEC │ 0x3 │ 4.0G │ 256M │ 100% │ RUNNING │
│ ├─ 1247 │ ENC │ 0x3 │ 1.5G │ 128M │ 82% │ RUNNING │
│ ├─ 3891 │ GR │ 0x7 │ 512M │ 128M │ 12% │ WAITING │
│ └─ 3891 │ CE0 │ 0x7 │ 64M │ 32M │ 5% │ WAITING │
├─────────────────────────────────────────────────────────────────────────────┤
│ POWER / CLOCKS / THERMALS │
│ ├─ Power Draw: 320W / 450W (71%) │ GPU Clock: 2850 MHz (max) │
│ ├─ Mem Clock: 1313 MHz (max) │ SM Clock: 2850 MHz │
│ ├─ Temp: 78°C (slowdown: 83°C) │ Fan: 65% (auto) │
│ └─ PState: P0 (Performance) │ Perf Cap: None │
├─────────────────────────────────────────────────────────────────────────────┤
│ GSP-RM TELEMETRY │
│ ├─ RPC Queue: GR=12 CE=3 DEC=0 ENC=1 (depth / max=64) │
│ ├─ Doorbell Rate: 45K/s │ Firmware Threads: 8/16 active │
│ ├─ WPR Regions: 3 active │ Migration: IDLE │
│ └─ Errors: 0 (CRC) 0 (Timeout) 0 (Page Fault) │
├─────────────────────────────────────────────────────────────────────────────┤
│ PCIe / NVLink │
│ ├─ Link: Gen4 x16 │ Throughput: 12.5 GB/s / 31.5 GB/s (40%) │
│ ├─ Replay Timer: 0 │ NAK: 0 │ L0→L1: 12 L1→L0: 12 │
│ └─ NVLink: N/A (single GPU) │
└─────────────────────────────────────────────────────────────────────────────┘
[F1] Help [F2] GPU Select [F3] Engine Detail [F4] Memory Detail [F5] Processes [F6] GSP [F10] Quit
```
## Key Bindings
| Key | Action |
|-----|--------|
| `↑/↓` | Navigate process list |
| `←/→` | Switch GPU (multi-GPU) |
| `F1` | Help |
| `F2` | GPU Select menu |
| `F3` | Engine detail view |
| `F4` | Memory detail view |
| `F5` | Process list (expanded) |
| `F6` | GSP-RM telemetry |
| `F7` | PCIe/NVLink detail |
| `F8` | Power/thermal graphs |
| `F9` | Configuration |
| `F10` / `q` | Quit |
| `Space` | Pause/resume updates |
| `s` | Change sample interval (100ms-10s) |
| `u` | Sort by GPU util / Memory / PID |
| `k` | Kill process (send SIGTERM to guest) |
| `e` | Export snapshot (JSON) |
## Engine Detail View (F3)
```
┌─ GR Engine Detail ────────────────────────────────────────────────────────┐
│ Channel 0 (PID 1247, CTX 0x3) │ Util: 82% │ Submitted: 1.2M ops │
│ ├─ Pushbuffer: 0x7f8a... │ Fence: 0x123456 │ Pending: 47 │
│ ├─ Context: 0x3 │ Page Tables: 0x100000 │ VRAM: 2.1G │
│ └─ Perf: SM=82% TEX=45% L2=67% ROPS=34% │
│ Channel 3 (PID 1247, CTX 0x3) │ Util: 12% │ Submitted: 45K ops │
│ └─ ... │
│ Channel 7 (PID 3891, CTX 0x7) │ Util: 5% │ Submitted: 12K ops │
│ └─ ... │
│ Channel 12 (PID 3891, CTX 0x7) │ Util: 0% │ Submitted: 0 ops │
│ └─ IDLE │
└────────────────────────────────────────────────────────────────────────────────┘
```
## Memory Detail View (F4)
```
┌─ Memory Detail ────────────────────────────────────────────────────────────┐
│ VRAM Allocations (by PID) │
│ ├─ 1247: 18.2G ████████████████████░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ 76% │
│ ├─ 3891: 0.6G ████░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ 2% │
│ └─ System: 0.1G ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ 0% │
│ │
│ Fragmentation: 12% │ Largest Free Block: 2.1G │ Allocation Count: 347 │
│ │
│ BAR1 Mappings (CPU→GPU) │
│ ├─ 0x7f8a00000000 → GPU VA 0x100000 (256M) RW PID 1247 │
│ └─ 0x7f8b00000000 → GPU VA 0x200000 (128M) RO PID 3891 │
└────────────────────────────────────────────────────────────────────────────────┘
```
## GSP-RM Telemetry View (F6)
```
┌─ GSP-RM Telemetry ────────────────────────────────────────────────────────┐
│ RPC Queues (depth / max=64) │
│ ├─ GR: ████████████░░░░░░░░░░ 12/64 │ Avg Latency: 2.3μs │
│ ├─ CE0: ███░░░░░░░░░░░░░░░░░░░░░ 3/64 │ Avg Latency: 1.1μs │
│ ├─ CE1: ░░░░░░░░░░░░░░░░░░░░░░░░ 0/64 │ - │
│ ├─ NVDEC: ██████████████████████ 64/64 │ Avg Latency: 4.7μs ⚠ SATURATED│
│ ├─ NVENC: ████████████░░░░░░░░░░░░░ 1/64 │ Avg Latency: 3.2μs │
│ └─ OFA: ░░░░░░░░░░░░░░░░░░░░░░░░ 0/64 │ - │
│ │
│ Doorbell Statistics │
│ ├─ Total Rate: 45,231/s │ Peak: 120,451/s │
│ ├─ GR: 28,123/s │ CE: 8,456/s │ DEC: 5,234/s │ ENC: 3,418/s │
│ └─ Errors: 0 (spurious) 0 (invalid) │
│ │
│ Firmware Threads (16 total) │
│ ├─ Active: 8 │ Idle: 6 │ Blocked: 2 │
│ ├─ Thread 0: GR Scheduler │ CPU: 45% │ RPC: 12,341/s │
│ ├─ Thread 1: CE Manager │ CPU: 12% │ RPC: 3,456/s │
│ ├─ Thread 2: DEC Manager │ CPU: 78% │ RPC: 5,234/s ⚠ HIGH │
│ └─ ... │
│ │
│ WPR State │
│ ├─ Region 0: 0x100000-0x200000 (1M) READ-ONLY PID 1247 │
│ ├─ Region 1: 0x300000-0x400000 (1M) NO-ACCESS PID 1247 │
│ └─ Region 2: 0x500000-0x600000 (1M) READ-WRITE PID 3891 │
└────────────────────────────────────────────────────────────────────────────────┘
```
## Multi-GPU Support
```
rmtop -g 0 # Start on GPU 0
rmtop -g all # Cycle through all GPUs (tab)
rmtop --layout=grid # Show all GPUs in grid (requires wide terminal)
```
## Configuration (`~/.config/rmtop/config.toml`)
```toml
[general]
sample_interval_ms = 500
theme = "dark" # dark, light, mono
show_gsp = true
show_pcie = true
show_nvlink = false
[colors]
engine_high = "red"
engine_medium = "yellow"
engine_low = "green"
warning = "red"
critical = "bright_red"
[columns]
# Show/hide columns in process list
pid = true
name = true
engine = true
context = true
vram = true
sysmem = true
util = true
state = true
[alerts]
gsp_queue_warning = 48 # 75% of max
gsp_queue_critical = 56 # 87.5% of max
temp_warning = 80
temp_critical = 85
power_warning = 400
```
## Build
```bash
cd open-iov/tools/rmtop
make
# Requires: ncursesw, libnvidia-rmapi.so, libgpumon.so, libpciaccess
```
## Architecture
```
rmtop/
├── src/
│ ├── main.c # ncurses init, main loop
│ ├── ui.c # Layout, rendering, input handling
│ ├── gpu_panel.c # GPU summary panel
│ ├── engine_panel.c # Engine utilization bars
│ ├── memory_panel.c # Memory breakdown
│ ├── process_panel.c # Process/channel list
│ ├── power_panel.c # Power/clocks/thermals
│ ├── gsp_panel.c # GSP-RM telemetry
│ ├── pcie_panel.c # PCIe/NVLink
│ ├── detail_views.c # F3-F8 detail panels
│ ├── sampler.c # Background sampling thread
│ └── config.c # Config file parsing
├── include/
│ └── rmtop.h
├── lib/
│ ├── librmapi.a
│ └── libgpumon.a
└── Makefile
```
## Future Extensions
- **Remote Dashboard**: WebSocket server for browser-based monitoring
- **Historical Graphs**: In-terminal sparklines for utilization history
- **Guest Correlation**: Map host channels to guest PIDs via vGPU VFIO
- **Workload Classification**: Auto-detect CUDA/Video/AI/Graphic workloads
- **Policy Visualization**: Show resserve reservations, quotas
- **Migration Tracking**: Live migration progress bars
- **Telemetry Export**: Background Prometheus/OpenTelemetry push
|
