(* 'top'-like tool for libvirt domains.
- * $Id: virt_top.ml,v 1.5 2007/08/30 13:52:40 rjones Exp $
- *)
+ (C) Copyright 2007 Richard W.M. Jones, Red Hat Inc.
+ http://libvirt.org/
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ This file contains utility functions.
+*)
+
+open Printf
+
+module C = Libvirt.Connect
+module D = Libvirt.Domain
+module N = Libvirt.Network
let (//) = Filename.concat
+(* Int64 operators for convenience. *)
+let (+^) = Int64.add
+let (-^) = Int64.sub
+let ( *^ ) = Int64.mul
+let (/^) = Int64.div
+
(* Input a whole file as a list of lines. *)
let input_all_lines chan =
let lines = ref [] in
let key, value = ExtString.String.split line " " in
lineno, trim key, trim value
) lines
+
+(* Pad a string to the full width with spaces. If too long, truncate. *)
+let pad width str =
+ let n = String.length str in
+ if n = width then str
+ else if n > width then String.sub str 0 width
+ else (* if n < width then *) str ^ String.make (width-n) ' '
+
+module Show = struct
+ (* Show a percentage in 4 chars. *)
+ let percent percent =
+ if percent <= 0. then " 0.0"
+ else if percent <= 9.9 then sprintf " %1.1f" percent
+ else if percent <= 99.9 then sprintf "%2.1f" percent
+ else "100 "
+
+ (* Show an int64 option in 4 chars. *)
+ let rec int64_option = function
+ | None -> " "
+ | Some n -> int64 n
+ (* Show an int64 in 4 chars. *)
+ and int64 = function
+ | n when n < 0L -> "-!!!"
+ | n when n <= 9999L ->
+ sprintf "%4Ld" n
+ | n when n /^ 1024L <= 999L ->
+ sprintf "%3LdK" (n /^ 1024L)
+ | n when n /^ 1_048_576L <= 999L ->
+ sprintf "%3LdM" (n /^ 1_048_576L)
+ | n when n /^ 1_073_741_824L <= 999L ->
+ sprintf "%3LdG" (n /^ 1_073_741_824L)
+ | _ -> ">!!!"
+
+ (* Format the total time (may be large!) in 9 chars. *)
+ let time ns =
+ let secs_in_ns = 1_000_000_000L in
+ let mins_in_ns = 60_000_000_000L in
+ let hours_in_ns = 3_600_000_000_000L in
+
+ let hours = ns /^ hours_in_ns in
+ let ns = ns -^ (hours *^ hours_in_ns) in
+ let mins = ns /^ mins_in_ns in
+ let ns = ns -^ (mins *^ mins_in_ns) in
+ let secs = ns /^ secs_in_ns in
+ let ns = ns -^ (secs *^ secs_in_ns) in
+ let pennies = ns /^ 10_000_000L in
+
+ if hours < 12L then
+ sprintf "%3Ld:%02Ld.%02Ld" (hours *^ 60L +^ mins) secs pennies
+ else if hours <= 999L then
+ sprintf "%3Ld:%02Ld:%02Ld" hours mins secs
+ else (
+ let days = hours /^ 24L in
+ let hours = hours -^ (days *^ 24L) in
+ sprintf "%3Ldd%02Ld:%02Ld" days hours mins
+ )
+end
+
+(* Sum Domain.block_stats structures together. Missing fields
+ * get forced to 0. Empty list returns all 0.
+ *)
+let zero_block_stats =
+ { D.rd_req = 0L; rd_bytes = 0L; wr_req = 0L; wr_bytes = 0L; errs = 0L }
+let add_block_stats bs1 bs2 =
+ let add f1 f2 = if f1 >= 0L && f2 >= 0L then f1 +^ f2 else 0L in
+ { D.rd_req = add bs1.D.rd_req bs2.D.rd_req;
+ rd_bytes = add bs1.D.rd_bytes bs2.D.rd_bytes;
+ wr_req = add bs1.D.wr_req bs2.D.wr_req;
+ wr_bytes = add bs1.D.wr_bytes bs2.D.wr_bytes;
+ errs = add bs1.D.errs bs2.D.errs }
+let sum_block_stats =
+ List.fold_left add_block_stats zero_block_stats
+
+(* Get the difference between two block_stats structures. Missing data
+ * forces the difference to -1.
+ *)
+let diff_block_stats curr prev =
+ let sub f1 f2 = if f1 >= 0L && f2 >= 0L then f1 -^ f2 else -1L in
+ { D.rd_req = sub curr.D.rd_req prev.D.rd_req;
+ rd_bytes = sub curr.D.rd_bytes prev.D.rd_bytes;
+ wr_req = sub curr.D.wr_req prev.D.wr_req;
+ wr_bytes = sub curr.D.wr_bytes prev.D.wr_bytes;
+ errs = sub curr.D.errs prev.D.errs }
+
+(* Sum Domain.interface_stats structures together. Missing fields
+ * get forced to 0. Empty list returns all 0.
+ *)
+let zero_interface_stats =
+ { D.rx_bytes = 0L; rx_packets = 0L; rx_errs = 0L; rx_drop = 0L;
+ tx_bytes = 0L; tx_packets = 0L; tx_errs = 0L; tx_drop = 0L }
+let add_interface_stats is1 is2 =
+ let add f1 f2 = if f1 >= 0L && f2 >= 0L then f1 +^ f2 else 0L in
+ { D.rx_bytes = add is1.D.rx_bytes is2.D.rx_bytes;
+ rx_packets = add is1.D.rx_packets is2.D.rx_packets;
+ rx_errs = add is1.D.rx_errs is2.D.rx_errs;
+ rx_drop = add is1.D.rx_drop is2.D.rx_drop;
+ tx_bytes = add is1.D.tx_bytes is2.D.tx_bytes;
+ tx_packets = add is1.D.tx_packets is2.D.tx_packets;
+ tx_errs = add is1.D.tx_errs is2.D.tx_errs;
+ tx_drop = add is1.D.tx_drop is2.D.tx_drop }
+let sum_interface_stats =
+ List.fold_left add_interface_stats zero_interface_stats
+
+(* Get the difference between two interface_stats structures.
+ * Missing data forces the difference to -1.
+ *)
+let diff_interface_stats curr prev =
+ let sub f1 f2 = if f1 >= 0L && f2 >= 0L then f1 -^ f2 else -1L in
+ { D.rx_bytes = sub curr.D.rx_bytes prev.D.rx_bytes;
+ rx_packets = sub curr.D.rx_packets prev.D.rx_packets;
+ rx_errs = sub curr.D.rx_errs prev.D.rx_errs;
+ rx_drop = sub curr.D.rx_drop prev.D.rx_drop;
+ tx_bytes = sub curr.D.tx_bytes prev.D.tx_bytes;
+ tx_packets = sub curr.D.tx_packets prev.D.tx_packets;
+ tx_errs = sub curr.D.tx_errs prev.D.tx_errs;
+ tx_drop = sub curr.D.tx_drop prev.D.tx_drop }
git.annexia.org / virt-top.git / blobdiff