avoid collecting unnecessary statistics.

crates/psh-system/src/disk/handle.rs

@@ -36,6 +36,14 @@ impl DiskHandle {
     }
 
     pub fn stat(&self, interval: Option<Duration>) -> Result<Vec<DiskStat>> {
-        self.0.get(interval)
+        self.0
+            .get(interval)
+            // remove loop* devices from results
+            .map(|stats| {
+                stats
+                    .into_iter()
+                    .filter(|stat| !stat.name.starts_with("loop"))
+                    .collect()
+            })
     }
 }

crates/psh-system/src/network/handle.rs

@@ -36,6 +36,20 @@ impl NetworkHandle {
     }
 
     pub fn stat(&self, interval: Option<Duration>) -> Result<HashMap<String, DeviceStatus>> {
-        self.0.get(interval)
+        self.0.get(interval).map(|stats| {
+            stats
+                .into_iter()
+                .filter(|(dev, _)| {
+                    !(dev == "lo"
+                        // TODO: docker network interface statistics may be useful
+                        || dev.starts_with("docker")
+                        || dev.starts_with("veth")
+                        || dev.starts_with("br-")
+                        || dev.starts_with("virbr")
+                        || dev.starts_with("tun")
+                        || dev.starts_with("tap"))
+                })
+                .collect()
+        })
     }
 }

crates/psh-system/src/rps/raw.rs

@@ -33,6 +33,10 @@ fn parse_queue_impl(dir: fs::DirEntry) -> Option<RpsQueue> {
 
 fn parse_device_impl(dir: fs::DirEntry) -> Option<RpsDetails> {
     let dev_path = dir.path();
+    // Check if device file exists
+    if !dev_path.join("device").exists() {
+        return None;
+    }
     let cur_path = dev_path.join("queues");
     match (dev_path.file_name(), fs::read_dir(cur_path)) {
         (Some(dev_name), Ok(rx_list)) => {
@@ -78,20 +82,7 @@ mod tests {
         rps_path.push("./test_resources/arch/x86_64/intel/net");
         let result = parse_rps_impl(rps_path.to_str().unwrap());
 
-        assert_eq!(result.len(), 3);
-
-        let rps_lo = result.iter().find(|rps| rps.dev == "lo");
-        assert_eq!(
-            rps_lo,
-            Some(&RpsDetails {
-                dev: "lo".to_string(),
-                queues: vec![RpsQueue {
-                    name: "rx-0".to_string(),
-                    cpus: Some(CpuMask(vec![false; 20])),
-                    flow_cnt: Some(0),
-                }]
-            })
-        );
+        assert_eq!(result.len(), 2);
 
         let rps_enp3s0 = result.iter().find(|rps| rps.dev == "enp3s0");
         assert_eq!(