2018-06-06 16:36:54 -07:00
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//! The `timing` module provides std::time utility functions.
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2018-05-07 16:49:15 -07:00
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use std::time::Duration;
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2018-05-08 17:59:01 -07:00
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use std::time::{SystemTime, UNIX_EPOCH};
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2018-05-07 16:49:15 -07:00
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2019-03-11 13:58:23 -07:00
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pub const NUM_TICKS_PER_SECOND: u64 = 100;
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2019-02-18 19:28:10 -08:00
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// At 10 ticks/s, 8 ticks per slot implies that leader rotation and voting will happen
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// every 800 ms. A fast voting cadence ensures faster finality and convergence
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2019-03-11 13:58:23 -07:00
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pub const DEFAULT_TICKS_PER_SLOT: u64 = 160;
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2019-03-05 17:56:51 -08:00
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pub const DEFAULT_SLOTS_PER_EPOCH: u64 = 16;
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2019-02-18 19:28:10 -08:00
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2019-03-02 09:17:03 -08:00
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/// The time window of recent block hash values that the bank will track the signatures
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/// of over. Once the bank discards a block hash, it will reject any transactions that use
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2019-03-02 10:25:16 -08:00
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/// that `recent_blockhash` in a transaction. Lowering this value reduces memory consumption,
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/// but requires clients to update its `recent_blockhash` more frequently. Raising the value
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2019-02-18 22:26:22 -08:00
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/// lengthens the time a client must wait to be certain a missing transaction will
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/// not be processed by the network.
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2019-03-01 12:16:20 -08:00
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pub const MAX_HASH_AGE_IN_SECONDS: usize = 120;
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2019-03-02 10:25:16 -08:00
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pub const MAX_RECENT_BLOCKHASHES: usize =
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2019-03-02 16:35:13 -08:00
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(NUM_TICKS_PER_SECOND * MAX_HASH_AGE_IN_SECONDS as u64 / DEFAULT_TICKS_PER_SLOT) as usize;
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2019-02-18 22:26:22 -08:00
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2018-06-22 10:44:31 -07:00
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pub fn duration_as_us(d: &Duration) -> u64 {
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2018-07-11 13:40:46 -07:00
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(d.as_secs() * 1000 * 1000) + (u64::from(d.subsec_nanos()) / 1_000)
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2018-06-22 10:44:31 -07:00
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}
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2018-05-07 16:49:15 -07:00
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pub fn duration_as_ms(d: &Duration) -> u64 {
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2018-07-11 13:40:46 -07:00
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(d.as_secs() * 1000) + (u64::from(d.subsec_nanos()) / 1_000_000)
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2018-05-07 16:49:15 -07:00
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}
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pub fn duration_as_s(d: &Duration) -> f32 {
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2018-07-11 13:40:46 -07:00
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d.as_secs() as f32 + (d.subsec_nanos() as f32 / 1_000_000_000.0)
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2018-05-07 16:49:15 -07:00
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}
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pub fn timestamp() -> u64 {
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2018-05-11 11:38:52 -07:00
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let now = SystemTime::now()
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.duration_since(UNIX_EPOCH)
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.expect("create timestamp in timing");
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2018-07-11 13:40:46 -07:00
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duration_as_ms(&now)
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2018-05-07 16:49:15 -07:00
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}
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