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[tracing] tracepoints to utxocache add, spent and uncache

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Signed-off-by: Arnab Sen <arnabsen1729@gmail.com>
This commit is contained in:
Arnab Sen
2021-09-03 22:08:53 +05:30
parent a26e8eef43
commit 2bc51c5c32
6 changed files with 208 additions and 10 deletions
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59
contrib/tracing/README.md
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@@ -234,3 +234,62 @@ Histogram of block connection times in milliseconds (ms).
[16, 32) 9 | |
[32, 64) 4 | |
```
### log_utxocache_flush.py
A BCC Python script to log the cache and index flushes. Based on the
`utxocache:flush` tracepoint.
```bash
$ python3 contrib/tracing/log_utxocache_flush.py ./src/bitcoind
```
```
Logging utxocache flushes. Ctrl-C to end...
Duration (µs) Mode Coins Count Memory Usage Prune Full Flush
0 PERIODIC 28484 3929.87 kB False False
1 PERIODIC 28485 3930.00 kB False False
0 PERIODIC 28489 3930.51 kB False False
1 PERIODIC 28490 3930.64 kB False False
0 PERIODIC 28491 3930.77 kB False False
0 PERIODIC 28491 3930.77 kB False False
0 PERIODIC 28496 3931.41 kB False False
1 PERIODIC 28496 3931.41 kB False False
0 PERIODIC 28497 3931.54 kB False False
1 PERIODIC 28497 3931.54 kB False False
1 PERIODIC 28499 3931.79 kB False False
.
.
.
53788 ALWAYS 30076 4136.27 kB False False
7463 ALWAYS 0 245.84 kB False False
```
### log_utxos.bt
A `bpftrace` script to log information about the coins that are added, spent, or
uncached from the UTXO set. Based on the `utxocache:add`, `utxocache:spend` and
`utxocache:uncache` tracepoints.
```bash
$ bpftrace contrib/tracing/log_utxos.bt
```
It should produce an output similar to the following.
```bash
Attaching 4 probes...
OP Outpoint Value Height Coinbase
Added 6ba9ad857e1ef2eb2a2c94f06813c414c7ab273e3d6bd7ad64e000315a887e7c:1 10000 2094512 No
Spent fa7dc4db56637a151f6649d8f26732956d1c5424c82aae400a83d02b2cc2c87b:0 182264897 2094512 No
Added eeb2f099b1af6a2a12e6ddd2eeb16fc5968582241d7f08ba202d28b60ac264c7:0 10000 2094512 No
Added eeb2f099b1af6a2a12e6ddd2eeb16fc5968582241d7f08ba202d28b60ac264c7:1 182254756 2094512 No
Added a0c7f4ec9cccef2d89672a624a4e6c8237a17572efdd4679eea9e9ee70d2db04:0 10072679 2094513 Yes
Spent 25e0df5cc1aeb1b78e6056bf403e5e8b7e41f138060ca0a50a50134df0549a5e:2 540 2094508 No
Spent 42f383c04e09c26a2378272ec33aa0c1bf4883ca5ab739e8b7e06be5a5787d61:1 3848399 2007724 No
Added f85e3b4b89270863a389395cc9a4123e417ab19384cef96533c6649abd6b0561:0 3788399 2094513 No
Added f85e3b4b89270863a389395cc9a4123e417ab19384cef96533c6649abd6b0561:2 540 2094513 No
Spent a05880b8c77971ed0b9f73062c7c4cdb0ff3856ab14cbf8bc481ed571cd34b83:1 5591281046 2094511 No
Added eb689865f7d957938978d6207918748f74e6aa074f47874724327089445b0960:0 5589696005 2094513 No
Added eb689865f7d957938978d6207918748f74e6aa074f47874724327089445b0960:1 1565556 2094513 No
```