gather more statistics from kinfo_user (sys/user.h) on FreeBSD

- real time runtime information (in microsecs) ki_runtime
- start timeval ki_start
- count of copy-on-write fauls ki_cow

daemon/albatross_influx.ml

@@ -107,6 +107,9 @@ module P = struct
         "tsize", i64 mem.tsize ;
         "dsize", i64 mem.dsize ;
         "ssize", i64 mem.ssize ;
+        "cow_fauls", string_of_int mem.cow ;
+        "runtime", i64 mem.runtime ;
+        "start", tv mem.start ;
       ]
     in
     let fields = List.map (fun (k, v) -> k ^ "=" ^ v) fields in

src/vmm_asn.ml

@@ -122,18 +122,21 @@ let ru =
 
 let kinfo_mem =
   let open Stats in
-  let f (vsize, rss, tsize, dsize, ssize) =
-    { vsize ; rss ; tsize ; dsize ; ssize }
+  let f (vsize, (rss, (tsize, (dsize, (ssize, (runtime, (cow, start))))))) =
+    { vsize ; rss ; tsize ; dsize ; ssize ; runtime ; cow ; start }
   and g t =
-    (t.vsize, t.rss, t.tsize, t.dsize, t.ssize)
+    (t.vsize, (t.rss, (t.tsize, (t.dsize, (t.ssize, (t.runtime, (t.cow, t.start)))))))
   in
   Asn.S.map f g @@
-  Asn.S.(sequence5
+  Asn.S.(sequence @@
            (required ~label:"bsize" int64)
-         (required ~label:"rss" int64)
-         (required ~label:"tsize" int64)
-         (required ~label:"dsize" int64)
-         (required ~label:"ssize" int64))
+         @ (required ~label:"rss" int64)
+         @ (required ~label:"tsize" int64)
+         @ (required ~label:"dsize" int64)
+         @ (required ~label:"ssize" int64)
+         @ (required ~label:"runtime" int64)
+         @ (required ~label:"cow" int)
+        -@ (required ~label:"start" timeval))
 
 (* TODO is this good? *)
 let int32 =

src/vmm_core.ml

@@ -222,11 +222,14 @@ module Stats = struct
     tsize : int64 ;
     dsize : int64 ;
     ssize : int64 ;
+    runtime : int64 ;
+    cow : int ;
+    start : (int64 * int) ;
   }
 
   let pp_kinfo_mem ppf t =
-    Fmt.pf ppf "virtual-size %Lu rss %Lu text-size %Lu data-size %Lu stack-size %Lu"
-      t.vsize t.rss t.tsize t.dsize t.ssize
+    Fmt.pf ppf "virtual-size %Lu rss %Lu text-size %Lu data-size %Lu stack-size %Lu runtime %Lu cow %u start %Lu.%d"
+      t.vsize t.rss t.tsize t.dsize t.ssize t.runtime t.cow (fst t.start) (snd t.start)
 
   type vmm = (string * int64) list
   let pp_vmm ppf vmm =

src/vmm_core.mli

@@ -108,6 +108,9 @@ module Stats : sig
     tsize : int64 ;
     dsize : int64 ;
     ssize : int64 ;
+    runtime : int64 ;
+    cow : int ;
+    start : (int64 * int) ;
   }
 
   val pp_kinfo_mem : kinfo_mem Fmt.t

stats/albatross_stat_client.ml

@@ -1,11 +1,28 @@
 open Vmm_core
 open Albatross_stats_pure
 
-let timer pid vmmapi =
+let old_rt = ref 0L
+
+let timer pid vmmapi interval =
   let rusage = sysctl_rusage pid in
   Logs.app (fun m -> m "sysctl rusage: %a" Stats.pp_rusage_mem rusage) ;
   let kinfo_mem = sysctl_kinfo_mem pid in
   Logs.app (fun m -> m "kinfo mem: %a" Stats.pp_kinfo_mem kinfo_mem) ;
+  let delta, pct =
+    if !old_rt = 0L then
+      let delta = kinfo_mem.Stats.runtime in
+      let now = Unix.gettimeofday () in
+      let start =
+        Int64.to_float (fst kinfo_mem.start) +.
+        ((float_of_int (snd kinfo_mem.start)) /. 1_000_000_000.)
+      in
+      delta, Int64.to_float delta /. ((now -. start) *. 1_000_000.)
+    else
+      let delta = Int64.sub kinfo_mem.Stats.runtime !old_rt in
+      delta, Int64.to_float delta /. (interval *. 1_000_000.)
+  in
+  Logs.app (fun m -> m "delta %Lu pct %f" delta pct) ;
+  old_rt := kinfo_mem.Stats.runtime;
   match vmmapi with
   | None -> ()
   | Some vmctx -> match wrap vmmapi_stats vmctx with
@@ -31,7 +48,7 @@ let jump _ pid name interval =
           fill_descr vmctx ;
           Some vmctx
     in
-    let _ev = Lwt_engine.on_timer interval true (fun _e -> timer pid vmmapi) in
+    let _ev = Lwt_engine.on_timer interval true (fun _e -> timer pid vmmapi interval) in
     let t, _u = Lwt.task () in
     t)
 

stats/albatross_stats_stubs.c

@@ -23,7 +23,7 @@
 
 CAMLprim value vmmanage_sysctl_kinfo_mem (value pid_r) {
   CAMLparam1(pid_r);
-  CAMLlocal3(res, utime, stime);
+  CAMLlocal2(res, start);
   int name[4];
   int error;
   size_t len;
@@ -39,12 +39,18 @@ CAMLprim value vmmanage_sysctl_kinfo_mem (value pid_r) {
   if (error < 0)
     uerror("sysctl", Nothing);
 
-  res = caml_alloc(5, 0);
+  res = caml_alloc(8, 0);
   Store_field (res, 0, Val64(p.ki_size));
   Store_field (res, 1, Val64(p.ki_rssize));
   Store_field (res, 2, Val64(p.ki_tsize));
   Store_field (res, 3, Val64(p.ki_dsize));
   Store_field (res, 4, Val64(p.ki_ssize));
+  Store_field (res, 5, Val64(p.ki_runtime));
+  Store_field (res, 6, Val_int(p.ki_cow));
+  start = caml_alloc(2, 0);
+  Store_field (start, 0, Val64(p.ki_start.tv_sec));
+  Store_field (start, 1, Val_int(p.ki_start.tv_usec));
+  Store_field (res, 7, start);
 
   CAMLreturn(res);
 }