- no states shared with other threads
- Deterministic computation
- Output depends on the input
- Reproducible
- output does not depend on the order and timing of other threads
- Shared states
- _Nondeterministic
- Nonreproducable
- shared resources
- speedup
- occurs when threads use different resources at the same times
- Modularity
- an application can be decomposed into threads
- if threads work on different data the scheduling doe not matter
- unless one relys on anothers data :)
- race conditions occur when threads share data, and their results depend on timing of executions
- an atomic operation always runs to completion; all or nothing
- Many operations are not atomic