Line data    Source code

       1              : use std::marker::PhantomData;
       2              : 
       3              : use measured::label::NoLabels;
       4              : use measured::metric::gauge::GaugeState;
       5              : use measured::metric::group::Encoding;
       6              : use measured::metric::name::MetricNameEncoder;
       7              : use measured::metric::{MetricEncoding, MetricFamilyEncoding, MetricType};
       8              : use measured::text::TextEncoder;
       9              : use measured::{LabelGroup, MetricGroup};
      10              : use tikv_jemalloc_ctl::{config, epoch, epoch_mib, stats, version};
      11              : 
      12              : pub struct MetricRecorder {
      13              :     epoch: epoch_mib,
      14              :     inner: Metrics,
      15              : }
      16              : 
      17              : #[derive(MetricGroup)]
      18              : struct Metrics {
      19              :     active_bytes: JemallocGaugeFamily<stats::active_mib>,
      20              :     allocated_bytes: JemallocGaugeFamily<stats::allocated_mib>,
      21              :     mapped_bytes: JemallocGaugeFamily<stats::mapped_mib>,
      22              :     metadata_bytes: JemallocGaugeFamily<stats::metadata_mib>,
      23              :     resident_bytes: JemallocGaugeFamily<stats::resident_mib>,
      24              :     retained_bytes: JemallocGaugeFamily<stats::retained_mib>,
      25              : }
      26              : 
      27              : impl<Enc: Encoding> MetricGroup<Enc> for MetricRecorder
      28              : where
      29              :     Metrics: MetricGroup<Enc>,
      30              : {
      31            0 :     fn collect_group_into(&self, enc: &mut Enc) -> Result<(), Enc::Err> {
      32            0 :         if self.epoch.advance().is_ok() {
      33            0 :             self.inner.collect_group_into(enc)?;
      34            0 :         }
      35            0 :         Ok(())
      36            0 :     }
      37              : }
      38              : 
      39              : impl MetricRecorder {
      40            0 :     pub fn new() -> Result<Self, anyhow::Error> {
      41            0 :         tracing::debug!(
      42            0 :             config = config::malloc_conf::read()?,
      43            0 :             version = version::read()?,
      44            0 :             "starting jemalloc recorder"
      45              :         );
      46              : 
      47              :         Ok(Self {
      48            0 :             epoch: epoch::mib()?,
      49              :             inner: Metrics {
      50            0 :                 active_bytes: JemallocGaugeFamily(stats::active::mib()?),
      51            0 :                 allocated_bytes: JemallocGaugeFamily(stats::allocated::mib()?),
      52            0 :                 mapped_bytes: JemallocGaugeFamily(stats::mapped::mib()?),
      53            0 :                 metadata_bytes: JemallocGaugeFamily(stats::metadata::mib()?),
      54            0 :                 resident_bytes: JemallocGaugeFamily(stats::resident::mib()?),
      55            0 :                 retained_bytes: JemallocGaugeFamily(stats::retained::mib()?),
      56              :             },
      57              :         })
      58            0 :     }
      59              : }
      60              : 
      61              : struct JemallocGauge<T>(PhantomData<T>);
      62              : 
      63              : impl<T> Default for JemallocGauge<T> {
      64            0 :     fn default() -> Self {
      65            0 :         JemallocGauge(PhantomData)
      66            0 :     }
      67              : }
      68              : impl<T> MetricType for JemallocGauge<T> {
      69              :     type Metadata = T;
      70              : }
      71              : 
      72              : struct JemallocGaugeFamily<T>(T);
      73              : impl<M, T: Encoding> MetricFamilyEncoding<T> for JemallocGaugeFamily<M>
      74              : where
      75              :     JemallocGauge<M>: MetricEncoding<T, Metadata = M>,
      76              : {
      77            0 :     fn collect_family_into(&self, name: impl MetricNameEncoder, enc: &mut T) -> Result<(), T::Err> {
      78            0 :         JemallocGauge::write_type(&name, enc)?;
      79            0 :         JemallocGauge(PhantomData).collect_into(&self.0, NoLabels, name, enc)
      80            0 :     }
      81              : }
      82              : 
      83              : macro_rules! jemalloc_gauge {
      84              :     ($stat:ident, $mib:ident) => {
      85              :         impl<W: std::io::Write> MetricEncoding<TextEncoder<W>> for JemallocGauge<stats::$mib> {
      86            0 :             fn write_type(
      87            0 :                 name: impl MetricNameEncoder,
      88            0 :                 enc: &mut TextEncoder<W>,
      89            0 :             ) -> Result<(), std::io::Error> {
      90            0 :                 GaugeState::write_type(name, enc)
      91            0 :             }
      92              : 
      93            0 :             fn collect_into(
      94            0 :                 &self,
      95            0 :                 mib: &stats::$mib,
      96            0 :                 labels: impl LabelGroup,
      97            0 :                 name: impl MetricNameEncoder,
      98            0 :                 enc: &mut TextEncoder<W>,
      99            0 :             ) -> Result<(), std::io::Error> {
     100            0 :                 if let Ok(v) = mib.read() {
     101            0 :                     GaugeState::new(v as i64).collect_into(&(), labels, name, enc)?;
     102            0 :                 }
     103            0 :                 Ok(())
     104            0 :             }
     105              :         }
     106              :     };
     107              : }
     108              : 
     109              : jemalloc_gauge!(active, active_mib);
     110              : jemalloc_gauge!(allocated, allocated_mib);
     111              : jemalloc_gauge!(mapped, mapped_mib);
     112              : jemalloc_gauge!(metadata, metadata_mib);
     113              : jemalloc_gauge!(resident, resident_mib);
     114              : jemalloc_gauge!(retained, retained_mib);