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proxmox-rrd: rename last_counter to last_value

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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 10:24:51 +02:00 committed by Thomas Lamprecht
parent bff7c027c9
commit 6728d0977b
2 changed files with 11 additions and 9 deletions
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18
proxmox-rrd/src/rrd.rs
View File

@ -63,7 +63,7 @@ pub struct DataSource {
pub last_update: f64,
/// Stores the last value, used to compute differential value for
/// derive/counters
pub counter_value: f64,
pub last_value: f64,
}
impl DataSource {
@ -72,7 +72,7 @@ impl DataSource {
Self {
dst,
last_update: 0.0,
counter_value: f64::NAN,
last_value: f64::NAN,
}
}
@ -94,21 +94,23 @@ impl DataSource {
if is_counter || self.dst == DST::Derive {
let time_diff = time - self.last_update;
let diff = if self.counter_value.is_nan() {
let diff = if self.last_value.is_nan() {
0.0
} else if is_counter && value < 0.0 {
bail!("got negative value for counter");
} else if is_counter && value < self.counter_value {
} else if is_counter && value < self.last_value {
// Note: We do not try automatic overflow corrections, but
// we update counter_value anyways, so that we can compute the diff
// we update last_value anyways, so that we can compute the diff
// next time.
self.counter_value = value;
self.last_value = value;
bail!("conter overflow/reset detected");
} else {
value - self.counter_value
value - self.last_value
};
self.counter_value = value;
self.last_value = value;
value = diff/time_diff;
} else {
self.last_value = value;
}
Ok(value)

2
proxmox-rrd/src/rrd_v1.rs
View File

@ -285,7 +285,7 @@ impl RRDv1 {
let source = DataSource {
dst,
counter_value: f64::NAN,
last_value: f64::NAN,
last_update: self.hour_avg.last_update, // IMPORTANT!
};
Ok(RRD {