Tag
system-calls
- Jan 15, 2026 Futex Wait and Wake: How a Lock Sleeps Without a Syscall on the Fast Path How a 32-bit word in user memory plus a hashed kernel wait queue gives uncontended locks no kernel entry at all, and what requeue and priority inheritance add for the contended cases. operating systems
- Mar 12, 2024 How strace Sees Every System Call Without Linking Into the Program The ptrace stop protocol behind syscall tracing, how entry and exit are paired from register state, and why tracing multiplies the cost of a syscall-heavy workload. systems programming