Rongsong Shen
367af11af1
A plain kill sent one SIGTERM and never escalated, and a plain stop sent one uncatchable SIGSTOP. Following LSF's TERMINATE and SUSPEND actions, a plain kill now sends SIGINT, then SIGTERM, then SIGKILL, and a plain stop sends SIGTSTP (the job can catch it, prepare and stop itself), then SIGSTOP if it has not stopped; each next signal follows after the grace period and only while the job is alive (or not yet stopped). A resume cancels a pending stop; the job's exit ends any sequence. An explicit signal is delivered once; a force kill is SIGKILL at once. - JobSignal gains grace (capnp @2, xce_signal_t.grace): > 0 asks for the sequence, in seconds between signals. - apiserver: job.terminate_interval (default 10 s, LSF's JOB_TERMINATE_INTERVAL); jobCtrlParams sends kill = SIGKILL and stop = SIGSTOP with that grace when no signal is given; the handler no longer pre-fills a default signal. - worker: grace travels through the job-control task, the kept-signal table (pending_signal_*_ex) and the IPC message; the job process runs the sequence (job_signal_seq_*, uv timer) and checks stop state in /proc. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> |
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Cross-Platform Xcecd Process
This is a cross-platform process manager implementation in C that supports both Linux and Windows platforms. The xcecd provides the following features:
- Sending status to the remote controller module at port 6789 and receive job requests
- Maintains a configurable thread pool for request processing
- Periodically collects and updates system resource status
- Manages child processes spawned from received commands
- Caches job status information
- Uses Unix Domain Sockets for communication between the main process and worker processes
Building
Prerequisites
- C compiler with C11 support
- Windows: Visual Studio
- Linux: GCC and development tools
Build Instructions
On Linux
make
On Windows
nmake
Configuration
The xcecd can be configured through the following parameters in main.c:
thread_pool_size: Number of threads in the thread pool (default: 4)resource_update_interval: Interval for updating system resource status in seconds (default: 1)job_status_update_interval: Interval for updating job status in seconds (default: 1)port: Port number to listen on (default: 7869)acct_file_path: Path to the accounting file (default:/tmp/xcecd.acct)log_file_path: Path to the log file (default:/tmp/xcecd.log)domain_sock_path: Path to the Unix Domain Socket file (default:/tmp/xcecd.sock)remote_host: Remote server address (default:lchen02)remote_port: Remote server port (default: 6789)update_interval: Interval for sending status updates to the remote server (default: 1 second)
Usage
Starting the Xcecd
On Windows:
xcecd.exe
On Linux:
./xcecd
Features
-
Cross-Platform Support
- Works on both Windows and Linux
- Abstracts platform-specific implementations
-
Thread Pool
- Configurable number of worker threads
- Efficient request handling
-
System Monitoring
- CPU usage monitoring
- Memory usage monitoring
- Disk space monitoring
-
Process Management
- Spawns child processes for received commands
- Tracks process status
- Manages process lifecycle
-
Network Communication
- TCP socket-based communication
- Simple text-based protocol
-
Unix Domain Socket Communication
- Uses Unix Domain Sockets for communication between the main process and worker processes
Architecture
The xcecd is composed of several key components:
- Main Process: Coordinates all components and manages the lifecycle
- Thread Pool: Handles concurrent request processing
- System Monitor: Collects and updates system resource information
- Process Manager: Manages child processes and their status
- Network Handler: Handles network communication and request receiving
- Resource Sync: Synchronizes and aggregates resource collection thread, system monitor, and job information
Contributing
Feel free to submit issues and enhancement requests!