TiFlash process get blocked when cpu_quota is less than 1 cpu

[JaySon-Huang]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

Deploy a tidb cluster using tiup with cpu_quota less than 100%

tiflash_servers:
- host: 127.0.0.1
  ...
  resource_control:
    cpu_quota: 80%

2. What did you expect to see? (Required)

tiflash starts normally or exit with explicit error message

3. What did you see instead (Required)

tiflash blocks forever

4. What is your TiFlash version? (Required)

master

[JaySon-Huang]

the logcial cpu is int, so 80% cpu_quota turns into 0 logical CPU cores. And some thread pools inited incorrectly.

[2024/09/27 18:49:50.158 +08:00] [INFO] [getNumberOfCPUCores.cpp:76] ["logical cpu cores: 0, hardware logical cpu cores: 72, hardware physical cpu cores: 36, physical cpu cores: 0, number_of_physical_cpu_cores: 1"] [thread_id=1]
[2024/09/27 18:49:50.158 +08:00] [INFO] [Server.cpp:1093] ["ServerInfo: CPU: \n     logical cores: 0\n     physical cores: 36\n     frequency: 0MHz\n     l1 cache size: 32768\n     l1 cache line size: 64\n     l2 cache size: 1048576\n     l2 cache line size: 64\n     l3 cache size: 25952256\n     l3 cache line size: 64\n     arch: amd64\nDisk: \n     name: /de
v/nvme0n1\n     type: SSD\n     total space: 3936820731904\n     free space: 1425970372608\n     mount point: /DATA/disk1\n     fstype: ext4\nDisk: \n     name: /dev/nvme1n1\n     type: SSD\n     total space: 3936820731904\n     free space: 2052457152512\n     mount point: /DATA/disk2\n     fstype: ext4\nDisk: \n     name: /dev/nvme2n1\n     type: SSD\n     to
tal space: 3936820731904\n     free space: 1677164838912\n     mount point: /DATA/disk3\n     fstype: ext4\nDisk: \n     name: /dev/nvme3n1\n     type: SSD\n     total space: 3936820731904\n     free space: 1707853307904\n     mount point: /DATA/disk4\n     fstype: ext4\nDisk: \n     name: /dev/sda2\n     type: SSD\n     total space: 3953205248\n     free spac
e: 3457921024\n     mount point: /boot\n     fstype: ext4\nDisk: \n     name: /dev/sda3\n     type: SSD\n     total space: 467794132992\n     free space: 234318372864\n     mount point: /\n     fstype: ext4\nDisk: \n     name: /dev/sda3\n     type: SSD\n     total space: 467794132992\n     free space: 234318372864\n     mount point: /var/lib/containers/storage
/overlay\n     fstype: ext4\nMemory: \n     capacity: 403782103040\n"] [thread_id=1]
...
[2024/09/27 18:49:50.832 +08:00] [INFO] [SegmentReader.cpp:146] ["Create start, thread_count=0 cpus=[11, 9, 48, 7, 38, 46, 5, 36, 16, 44, 3, 52, 14, 42, 1, 50, 12, 40, 49, 10, 8, 39, 47, 6, 37, 17, 45, 4, 53, 15, 43, 2, 51, 13, 41, 0]"] [thread_id=1]
[2024/09/27 18:49:50.832 +08:00] [INFO] [SegmentReader.cpp:151] ["Create end, thread_count=0 cpus=[11, 9, 48, 7, 38, 46, 5, 36, 16, 44, 3, 52, 14, 42, 1, 50, 12, 40, 49, 10, 8, 39, 47, 6, 37, 17, 45, 4, 53, 15, 43, 2, 51, 13, 41, 0]"] [thread_id=1]
[2024/09/27 18:49:50.832 +08:00] [INFO] [SegmentReader.cpp:146] ["Create start, thread_count=0 cpus=[21, 68, 58, 66, 28, 56, 18, 64, 26, 54, 34, 62, 24, 70, 32, 60, 22, 69, 30, 59, 20, 67, 29, 57, 19, 65, 27, 55, 35, 63, 25, 71, 33, 61, 23, 31]"] [thread_id=1]
[2024/09/27 18:49:50.832 +08:00] [INFO] [SegmentReader.cpp:151] ["Create end, thread_count=0 cpus=[21, 68, 58, 66, 28, 56, 18, 64, 26, 54, 34, 62, 24, 70, 32, 60, 22, 69, 30, 59, 20, 67, 29, 57, 19, 65, 27, 55, 35, 63, 25, 71, 33, 61, 23, 31]"] [thread_id=1]