[Possible Bug]: CPU Metrics when multiple IO Threads

[PinoOG]

Preconditions (Any important steps we need to know) in redis.conf

io-threads X (where X != 1) io-threads-do-reads yes

Steps to reproduce (How to reproduce what you found step by step) // It depends on the redis node cpu usage (displayed by btop/htop)

Actual behavior (A short description of what you found) When redis-server cpu usage is more than 100% on btop/htop the value in redis insight only reflects up to 100%

Expected behavior (A short description of what you expected to find) Detecting when io-threads are enabled and displaying the CPU output in a format which could be like this %/THREAD_AMOUNT*100

Example: 4 threads 250/400%

Screenshots (Paste or drag-and-drop a screenshot or a link to a recording) // Not really needed

Additional context (Operating system, version of Redis Insight, Redis database version, Redis module version, database type, connection type, logs, or any other information) os: Linux 6.12.48+deb13-amd64 x86_64 redis-server: 8.2.2 redis-insight: 3.0.0

[valkirilov]

Thanks for reporting this odd issue @PinoOG, I managed to reproduce it. We'll take a deeper look at whether it's actually a bug, and we'll let you know when we have more info and progress on this.

For clarity, here is the Docker setup that I used:

• docker-compose.yml

version: "3.9"

services:
  redis:
    image: redis:8.2
    container_name: redis-io-threads-test
    command: ["redis-server", "/usr/local/etc/redis/redis.conf"]
    volumes:
      - ./redis.conf:/usr/local/etc/redis/redis.conf:ro
    ports:
      - "6379:6379"
    networks:
      - redis-net

  redisinsight:
    image: redis/redisinsight:latest
    container_name: redisinsight-io-threads-test
    depends_on:
      - redis
    ports:
      - "5540:5540"
    networks:
      - redis-net
    # For RedisInsight in Docker, default URL is http://localhost:5540

  loadgen:
    image: redis:8.2
    container_name: redis-loadgen
    depends_on:
      - redis
    networks:
      - redis-net
    entrypoint: ["/bin/sh", "-c"]
    command: >
      "sleep 5;
      echo 'Starting redis-benchmark load loop...';
      while true; do
        redis-benchmark -h redis -p 6379 \
          -n 10000000 \
          -c 500 \
          -P 32 \
          -t get,set,incr,lpush,rpush,lpop,rpop,sadd,spop,lrange,mset;
      done"

networks:
  redis-net:
    driver: bridge

• redis.conf

# Basic config
port 6379
bind 0.0.0.0
protected-mode no

# Enable I/O threads
# Choose any value > 1, here we use 4 as in your example
io-threads 4
io-threads-do-reads yes

# Optional: lower logging noise
loglevel notice

# Optional: explicitly disable persistence for faster benchmark
save ""
appendonly no

And I run it via the following commands:

# Start Docker containers for Redis, Redis Insight, and the Benchmark script
docker-compose up --build

# Monitor current CPU usage
docker stats redis-io-threads-test

[PinoOG]

Thank you! I will wait for your news.