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proxmox-rrd: new helpers: slot, slot_start_time & slot_end_time 

Signed-off-by: Dietmar Maurer <dietmar@proxmox.com>
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
This commit is contained in:
Dietmar Maurer 2021-10-13 10:24:49 +02:00 committed by Thomas Lamprecht
parent 5885767b91
commit 79b3113361
1 changed files with 22 additions and 9 deletions
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31
proxmox-rrd/src/rrd.rs
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@ -135,6 +135,18 @@ impl RRA {
}
}
pub fn slot_end_time(&self, time: u64) -> u64 {
self.resolution * (time / self.resolution + 1)
}
pub fn slot_start_time(&self, time: u64) -> u64 {
self.resolution * (time / self.resolution)
}
pub fn slot(&self, time: u64) -> usize {
((time / self.resolution) as usize) % self.data.len()
}
// directly overwrite data slots
// the caller need to set last_update value on the DataSource manually.
pub(crate) fn insert_data(
@ -146,8 +158,8 @@ impl RRA {
if resolution != self.resolution {
bail!("inser_data failed: got wrong resolution");
}
let num_entries = self.data.len() as u64;
let mut index = ((start/self.resolution) % num_entries) as usize;
let mut index = self.slot(start);
for i in 0..data.len() {
if let Some(v) = data[i] {
@ -167,7 +179,9 @@ impl RRA {
let min_time = epoch - num_entries*reso;
let min_time = (min_time/reso + 1)*reso;
let mut t = last_update.saturating_sub(num_entries*reso);
let mut index = ((t/reso) % num_entries) as usize;
let mut index = self.slot(t);
for _ in 0..num_entries {
t += reso;
index += 1; if index >= self.data.len() { index = 0; }
@ -183,12 +197,11 @@ impl RRA {
let epoch = time as u64;
let last_update = last_update as u64;
let reso = self.resolution;
let num_entries = self.data.len() as u64;
let index = ((epoch/reso) % num_entries) as usize;
let last_index = ((last_update/reso) % num_entries) as usize;
let index = self.slot(epoch);
let last_index = self.slot(last_update);
if (epoch - (last_update as u64)) > reso || index != last_index {
if (epoch - last_update) > reso || index != last_index {
self.last_count = 0;
}
@ -233,11 +246,11 @@ impl RRA {
let mut list = Vec::new();
let rrd_end = reso*(last_update/reso + 1);
let rrd_end = self.slot_end_time(last_update);
let rrd_start = rrd_end.saturating_sub(reso*num_entries);
let mut t = start;
let mut index = ((t/reso) % num_entries) as usize;
let mut index = self.slot(t);
for _ in 0..num_entries {
if t > end { break; };
if t < rrd_start || t > rrd_end {