1 (* 'top'-like tool for libvirt domains.
2 (C) Copyright 2007 Richard W.M. Jones, Red Hat Inc.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 module C = Libvirt.Connect
27 module D = Libvirt.Domain
28 module N = Libvirt.Network
30 (* Hook for XML support (see virt_top_xml.ml). *)
31 let parse_device_xml : (int -> [>`R] D.t -> string list * string list) ref =
36 (* Hooks for CSV support (see virt_top_csv.ml). *)
37 let csv_start : (string -> unit) ref =
39 fun _ -> failwith "virt-top was compiled without support for CSV"
41 let csv_write : (string list -> unit) ref =
46 (* Int64 operators for convenience. *)
49 let ( *^ ) = Int64.mul
54 | DomainID | DomainName | Processor | Memory | Time
55 | NetRX | NetTX | BlockRdRq | BlockWrRq
56 let all_sort_fields = [
57 DomainID; DomainName; Processor; Memory; Time;
58 NetRX; NetTX; BlockRdRq; BlockWrRq
60 let printable_sort_order = function
63 | Time -> "TIME (CPU time)"
64 | DomainID -> "Domain ID"
65 | DomainName -> "Domain name"
66 | NetRX -> "Net RX bytes"
67 | NetTX -> "Net TX bytes"
68 | BlockRdRq -> "Block read reqs"
69 | BlockWrRq -> "Block write reqs"
70 let sort_order_of_cli = function
71 | "cpu" | "processor" -> Processor
72 | "mem" | "memory" -> Memory
75 | "name" -> DomainName
76 | "netrx" -> NetRX | "nettx" -> NetTX
77 | "blockrdrq" -> BlockRdRq | "blockwrrq" -> BlockWrRq
78 | str -> failwith (str ^ ": sort order should be: cpu|mem|time|id|name|netrx|nettx|blockrdrq|blockwrrq")
79 let cli_of_sort_order = function
84 | DomainName -> "name"
87 | BlockRdRq -> "blockrdrq"
88 | BlockWrRq -> "blockwrrq"
90 (* Current major display mode: TaskDisplay is the normal display. *)
91 type display = TaskDisplay | PCPUDisplay | BlockDisplay | NetDisplay
93 let display_of_cli = function
94 | "task" -> TaskDisplay
95 | "pcpu" -> PCPUDisplay
96 | "block" -> BlockDisplay
98 | str -> failwith (str ^ ": display should be task|pcpu|block|net")
99 let cli_of_display = function
100 | TaskDisplay -> "task"
101 | PCPUDisplay -> "pcpu"
102 | BlockDisplay -> "block"
103 | NetDisplay -> "net"
106 type init_file = NoInitFile | DefaultInitFile | InitFile of string
110 let delay = ref 3000 (* milliseconds *)
111 let historical_cpu_delay = ref 20 (* secs *)
112 let iterations = ref (-1)
113 let batch_mode = ref false
114 let secure_mode = ref false
115 let sort_order = ref Processor
116 let display_mode = ref TaskDisplay
118 let debug_file = ref ""
119 let csv_enabled = ref false
120 let csv_cpu = ref true
121 let csv_block = ref true
122 let csv_net = ref true
123 let init_file = ref DefaultInitFile
124 let script_mode = ref false
126 (* Function to read command line arguments and go into curses mode. *)
128 (* Read command line arguments. *)
129 let rec set_delay newdelay =
130 if newdelay <= 0. then
131 failwith "-d: cannot set a negative delay";
132 delay := int_of_float (newdelay *. 1000.)
133 and set_uri = function "" -> uri := None | u -> uri := Some u
134 and set_sort order = sort_order := sort_order_of_cli order
135 and set_pcpu_mode () = display_mode := PCPUDisplay
136 and set_net_mode () = display_mode := NetDisplay
137 and set_block_mode () = display_mode := BlockDisplay
138 and set_csv filename =
139 (!csv_start) filename;
141 and no_init_file () = init_file := NoInitFile
142 and set_init_file filename = init_file := InitFile filename
144 let argspec = Arg.align [
145 "-1", Arg.Unit set_pcpu_mode, " Start by displaying pCPUs (default: tasks)";
146 "-2", Arg.Unit set_net_mode, " Start by displaying network interfaces";
147 "-3", Arg.Unit set_block_mode, " Start by displaying block devices";
148 "-b", Arg.Set batch_mode, " Batch mode";
149 "-c", Arg.String set_uri, "uri Connect to URI (default: Xen)";
150 "--connect", Arg.String set_uri, "uri Connect to URI (default: Xen)";
151 "--csv", Arg.String set_csv, "file Log statistics to CSV file";
152 "--no-csv-cpu", Arg.Clear csv_cpu, " Disable CPU stats in CSV";
153 "--no-csv-block", Arg.Clear csv_block, " Disable block device stats in CSV";
154 "--no-csv-net", Arg.Clear csv_net, " Disable net stats in CSV";
155 "-d", Arg.Float set_delay, "delay Delay time interval (seconds)";
156 "--debug", Arg.Set_string debug_file, "file Send debug messages to file";
157 "--hist-cpu", Arg.Set_int historical_cpu_delay, "secs Historical CPU delay";
158 "--init-file", Arg.String set_init_file, "file Set name of init file";
159 "--no-init-file", Arg.Unit no_init_file, " Do not read init file";
160 "-n", Arg.Set_int iterations, "iterations Number of iterations to run";
161 "-o", Arg.String set_sort, "sort Set sort order (cpu|mem|time|id|name)";
162 "-s", Arg.Set secure_mode, " Secure (\"kiosk\") mode";
163 "--script", Arg.Set script_mode, " Run from a script (no user interface)";
165 let anon_fun str = raise (Arg.Bad (str ^ ": unknown parameter")) in
166 let usage_msg = "virt-top : a 'top'-like utility for virtualization
172 Arg.parse argspec anon_fun usage_msg;
174 (* Read the init file. *)
175 let try_to_read_init_file filename =
176 let config = read_config_file filename in
179 | _, "display", mode -> display_mode := display_of_cli mode
180 | _, "delay", secs -> set_delay (float_of_string secs)
181 | _, "hist-cpu", secs -> historical_cpu_delay := int_of_string secs
182 | _, "iterations", n -> iterations := int_of_string n
183 | _, "sort", order -> set_sort order
184 | _, "connect", uri -> set_uri uri
185 | _, "debug", filename -> debug_file := filename
186 | _, "csv", filename -> set_csv filename
187 | _, "csv-cpu", b -> csv_cpu := bool_of_string b
188 | _, "csv-block", b -> csv_block := bool_of_string b
189 | _, "csv-net", b -> csv_net := bool_of_string b
190 | _, "batch", b -> batch_mode := bool_of_string b
191 | _, "secure", b -> secure_mode := bool_of_string b
192 | _, "script", b -> script_mode := bool_of_string b
193 | _, "overwrite-init-file", "false" -> no_init_file ()
195 eprintf "%s:%d: configuration item ``%s'' ignored\n%!"
199 (match !init_file with
202 let home = try Sys.getenv "HOME" with Not_found -> "/" in
203 let filename = home // ".virt-toprc" in
204 try_to_read_init_file filename
205 | InitFile filename ->
206 try_to_read_init_file filename
209 (* Connect to the hypervisor before going into curses mode, since
210 * this is the most likely thing to fail.
214 try C.connect_readonly ?name ()
216 Libvirt.Virterror err ->
217 prerr_endline (Libvirt.Virterror.to_string err);
218 (* If non-root and no explicit connection URI, print a warning. *)
219 if Unix.geteuid () <> 0 && name = None then (
220 print_endline "NB: If you want to monitor a local Xen hypervisor, you usually need to be root";
224 (* Get the node_info. This never changes, right? So we get it just once. *)
225 let node_info = C.get_node_info conn in
227 (* Hostname and libvirt library version also don't change. *)
229 try C.get_hostname conn
231 (* qemu:/// and other URIs didn't support virConnectGetHostname until
232 * libvirt 0.3.3. Before that they'd throw a virterror. *)
233 | Libvirt.Virterror _
234 | Invalid_argument "virConnectGetHostname not supported" -> "unknown" in
236 let libvirt_version =
237 let v, _ = Libvirt.get_version () in
238 v / 1_000_000, (v / 1_000) mod 1_000, v mod 1_000 in
240 (* Open debug file if specified.
241 * NB: Do this just before jumping into curses mode.
243 (match !debug_file with
244 | "" -> (* No debug file specified, send stderr to /dev/null unless
245 * we're in script mode.
247 if not !script_mode then (
248 let fd = Unix.openfile "/dev/null" [Unix.O_WRONLY] 0o644 in
249 Unix.dup2 fd Unix.stderr;
252 | filename -> (* Send stderr to the named file. *)
254 Unix.openfile filename [Unix.O_WRONLY;Unix.O_CREAT;Unix.O_TRUNC]
256 Unix.dup2 fd Unix.stderr;
260 (* Curses voodoo (see ncurses(3)). *)
261 if not !script_mode then (
266 let stdscr = stdscr () in
267 intrflush stdscr false;
272 (* This tuple of static information is called 'setup' in other parts
273 * of this program, and is passed to other functions such as redraw and
274 * main_loop. See virt_top_main.ml.
277 !batch_mode, !script_mode, !csv_enabled, (* immutable modes *)
278 node_info, hostname, libvirt_version (* info that doesn't change *)
281 (* Show a percentage in 4 chars. *)
282 let show_percent percent =
283 if percent <= 0. then " 0.0"
284 else if percent <= 9.9 then sprintf " %1.1f" percent
285 else if percent <= 99.9 then sprintf "%2.1f" percent
288 (* Show an int64 option in 4 chars. *)
289 let rec show_int64_option = function
291 | Some n -> show_int64 n
292 (* Show an int64 in 4 chars. *)
293 and show_int64 = function
294 | n when n < 0L -> "-!!!"
295 | n when n <= 9999L ->
297 | n when n /^ 1024L <= 999L ->
298 sprintf "%3LdK" (n /^ 1024L)
299 | n when n /^ 1_048_576L <= 999L ->
300 sprintf "%3LdM" (n /^ 1_048_576L)
301 | n when n /^ 1_073_741_824L <= 999L ->
302 sprintf "%3LdG" (n /^ 1_073_741_824L)
305 (* Format the total time (may be large!) in 9 chars. *)
307 let secs_in_ns = 1_000_000_000L in
308 let mins_in_ns = 60_000_000_000L in
309 let hours_in_ns = 3_600_000_000_000L in
311 let hours = ns /^ hours_in_ns in
312 let ns = ns -^ (hours *^ hours_in_ns) in
313 let mins = ns /^ mins_in_ns in
314 let ns = ns -^ (mins *^ mins_in_ns) in
315 let secs = ns /^ secs_in_ns in
316 let ns = ns -^ (secs *^ secs_in_ns) in
317 let pennies = ns /^ 10_000_000L in
320 sprintf "%3Ld:%02Ld.%02Ld" (hours *^ 60L +^ mins) secs pennies
321 else if hours <= 999L then
322 sprintf "%3Ld:%02Ld:%02Ld" hours mins secs
324 let days = hours /^ 24L in
325 let hours = hours -^ (days *^ 24L) in
326 sprintf "%3Ldd%02Ld:%02Ld" days hours mins
329 (* Show a domain state (the 'S' column). *)
330 let show_state = function
331 | D.InfoNoState -> '?'
332 | D.InfoRunning -> 'R'
333 | D.InfoBlocked -> 'S'
334 | D.InfoPaused -> 'P'
335 | D.InfoShutdown -> 'D'
336 | D.InfoShutoff -> 'O'
337 | D.InfoCrashed -> 'X'
339 (* Sum Domain.block_stats structures together. Missing fields
340 * get forced to 0. Empty list returns all 0.
342 let zero_block_stats =
343 { D.rd_req = 0L; rd_bytes = 0L; wr_req = 0L; wr_bytes = 0L; errs = 0L }
344 let add_block_stats bs1 bs2 =
345 let add f1 f2 = if f1 >= 0L && f2 >= 0L then f1 +^ f2 else 0L in
346 { D.rd_req = add bs1.D.rd_req bs2.D.rd_req;
347 rd_bytes = add bs1.D.rd_bytes bs2.D.rd_bytes;
348 wr_req = add bs1.D.wr_req bs2.D.wr_req;
349 wr_bytes = add bs1.D.wr_bytes bs2.D.wr_bytes;
350 errs = add bs1.D.errs bs2.D.errs }
351 let sum_block_stats =
352 List.fold_left add_block_stats zero_block_stats
354 (* Get the difference between two block_stats structures. Missing data
355 * forces the difference to -1.
357 let diff_block_stats curr prev =
358 let sub f1 f2 = if f1 >= 0L && f2 >= 0L then f1 -^ f2 else -1L in
359 { D.rd_req = sub curr.D.rd_req prev.D.rd_req;
360 rd_bytes = sub curr.D.rd_bytes prev.D.rd_bytes;
361 wr_req = sub curr.D.wr_req prev.D.wr_req;
362 wr_bytes = sub curr.D.wr_bytes prev.D.wr_bytes;
363 errs = sub curr.D.errs prev.D.errs }
365 (* Sum Domain.interface_stats structures together. Missing fields
366 * get forced to 0. Empty list returns all 0.
368 let zero_interface_stats =
369 { D.rx_bytes = 0L; rx_packets = 0L; rx_errs = 0L; rx_drop = 0L;
370 tx_bytes = 0L; tx_packets = 0L; tx_errs = 0L; tx_drop = 0L }
371 let add_interface_stats is1 is2 =
372 let add f1 f2 = if f1 >= 0L && f2 >= 0L then f1 +^ f2 else 0L in
373 { D.rx_bytes = add is1.D.rx_bytes is2.D.rx_bytes;
374 rx_packets = add is1.D.rx_packets is2.D.rx_packets;
375 rx_errs = add is1.D.rx_errs is2.D.rx_errs;
376 rx_drop = add is1.D.rx_drop is2.D.rx_drop;
377 tx_bytes = add is1.D.tx_bytes is2.D.tx_bytes;
378 tx_packets = add is1.D.tx_packets is2.D.tx_packets;
379 tx_errs = add is1.D.tx_errs is2.D.tx_errs;
380 tx_drop = add is1.D.tx_drop is2.D.tx_drop }
381 let sum_interface_stats =
382 List.fold_left add_interface_stats zero_interface_stats
384 (* Get the difference between two interface_stats structures.
385 * Missing data forces the difference to -1.
387 let diff_interface_stats curr prev =
388 let sub f1 f2 = if f1 >= 0L && f2 >= 0L then f1 -^ f2 else -1L in
389 { D.rx_bytes = sub curr.D.rx_bytes prev.D.rx_bytes;
390 rx_packets = sub curr.D.rx_packets prev.D.rx_packets;
391 rx_errs = sub curr.D.rx_errs prev.D.rx_errs;
392 rx_drop = sub curr.D.rx_drop prev.D.rx_drop;
393 tx_bytes = sub curr.D.tx_bytes prev.D.tx_bytes;
394 tx_packets = sub curr.D.tx_packets prev.D.tx_packets;
395 tx_errs = sub curr.D.tx_errs prev.D.tx_errs;
396 tx_drop = sub curr.D.tx_drop prev.D.tx_drop }
398 (* Update the display and sleep for given number of seconds. *)
399 let sleep n = refresh (); Unix.sleep n
401 (* The curses getstr/getnstr functions are just weird.
402 * This helper function also enables echo temporarily.
404 let get_string maxlen =
406 let str = String.create maxlen in
407 let ok = getstr str in (* Safe because binding calls getnstr. *)
411 (* Chop at first '\0'. *)
413 let i = String.index str '\000' in
416 Not_found -> str (* it is full maxlen bytes *)
419 (* Pad a string to the full width with spaces. If too long, truncate. *)
421 let n = String.length str in
422 if n = width then str
423 else if n > width then String.sub str 0 width
424 else (* if n < width then *) str ^ String.make (width-n) ' '
428 let summary_lineno = 1 (* this takes 2 lines *)
429 let message_lineno = 3
430 let header_lineno = 4
431 let domains_lineno = 5
433 (* Print in the "message area". *)
434 let clear_msg () = move message_lineno 0; clrtoeol ()
435 let print_msg str = clear_msg (); mvaddstr message_lineno 0 str; ()
437 (* Intermediate "domain + stats" structure that we use to collect
438 * everything we know about a domain within the collect function.
440 type rd_domain = Inactive | Active of rd_active
442 rd_domid : int; (* Domain ID. *)
443 rd_dom : [`R] D.t; (* Domain object. *)
444 rd_info : D.info; (* Domain CPU info now. *)
445 rd_block_stats : (string * D.block_stats) list;
446 (* Domain block stats now. *)
447 rd_interface_stats : (string * D.interface_stats) list;
448 (* Domain net stats now. *)
449 rd_prev_info : D.info option; (* Domain CPU info previously. *)
450 rd_prev_block_stats : (string * D.block_stats) list;
451 (* Domain block stats prev. *)
452 rd_prev_interface_stats : (string * D.interface_stats) list;
453 (* Domain interface stats prev. *)
454 (* The following are since the last slice, or 0 if cannot be calculated: *)
455 rd_cpu_time : float; (* CPU time used in nanoseconds. *)
456 rd_percent_cpu : float; (* CPU time as percent of total. *)
457 (* The following are since the last slice, or None if cannot be calc'd: *)
458 rd_block_rd_reqs : int64 option; (* Number of block device read rqs. *)
459 rd_block_wr_reqs : int64 option; (* Number of block device write rqs. *)
460 rd_net_rx_bytes : int64 option; (* Number of bytes received. *)
461 rd_net_tx_bytes : int64 option; (* Number of bytes transmitted. *)
465 let collect, clear_pcpu_display_data =
466 (* We cache the list of block devices and interfaces for each domain
467 * here, so we don't need to reparse the XML each time.
469 let devices = Hashtbl.create 13 in
471 (* Function to get the list of block devices, network interfaces for
472 * a particular domain. Get it from the devices cache, and if not
473 * there then parse the domain XML.
475 let get_devices id dom =
476 try Hashtbl.find devices id
478 let blkdevs, netifs = (!parse_device_xml) id dom in
479 Hashtbl.replace devices id (blkdevs, netifs);
483 (* We save the state of domains across redraws here, which allows us
484 * to deduce %CPU usage from the running total.
486 let last_info = Hashtbl.create 13 in
487 let last_time = ref (Unix.gettimeofday ()) in
489 (* Save vcpuinfo structures across redraws too (only for pCPU display). *)
490 let last_vcpu_info = Hashtbl.create 13 in
492 let clear_pcpu_display_data () =
493 (* Clear out vcpu_info used by PCPUDisplay display_mode
494 * when we switch back to TaskDisplay mode.
496 Hashtbl.clear last_vcpu_info
499 let collect (conn, _, _, _, node_info, _, _) =
500 (* Number of physical CPUs (some may be disabled). *)
501 let nr_pcpus = C.maxcpus_of_node_info node_info in
503 (* Get the current time. *)
504 let time = Unix.gettimeofday () in
505 let tm = Unix.localtime time in
507 sprintf "%02d:%02d:%02d" tm.Unix.tm_hour tm.Unix.tm_min tm.Unix.tm_sec in
509 (* What's the total CPU time elapsed since we were last called? (ns) *)
510 let total_cpu_per_pcpu = 1_000_000_000. *. (time -. !last_time) in
511 (* Avoid division by zero. *)
512 let total_cpu_per_pcpu =
513 if total_cpu_per_pcpu <= 0. then 1. else total_cpu_per_pcpu in
514 let total_cpu = float node_info.C.cpus *. total_cpu_per_pcpu in
516 (* Get the domains. Match up with their last_info (if any). *)
518 (* Active domains. *)
519 let n = C.num_of_domains conn in
521 if n > 0 then Array.to_list (C.list_domains conn n)
527 let dom = D.lookup_by_id conn id in
528 let name = D.get_name dom in
529 let blkdevs, netifs = get_devices id dom in
531 (* Get current CPU, block and network stats. *)
532 let info = D.get_info dom in
534 try List.map (fun dev -> dev, D.block_stats dom dev) blkdevs
536 | Invalid_argument "virDomainBlockStats not supported"
537 | Libvirt.Virterror _ -> [] in
538 let interface_stats =
539 try List.map (fun dev -> dev, D.interface_stats dom dev) netifs
541 | Invalid_argument "virDomainInterfaceStats not supported"
542 | Libvirt.Virterror _ -> [] in
544 let prev_info, prev_block_stats, prev_interface_stats =
546 let prev_info, prev_block_stats, prev_interface_stats =
547 Hashtbl.find last_info id in
548 Some prev_info, prev_block_stats, prev_interface_stats
549 with Not_found -> None, [], [] in
552 rd_domid = id; rd_dom = dom; rd_info = info;
553 rd_block_stats = block_stats;
554 rd_interface_stats = interface_stats;
555 rd_prev_info = prev_info;
556 rd_prev_block_stats = prev_block_stats;
557 rd_prev_interface_stats = prev_interface_stats;
558 rd_cpu_time = 0.; rd_percent_cpu = 0.;
559 rd_block_rd_reqs = None; rd_block_wr_reqs = None;
560 rd_net_rx_bytes = None; rd_net_tx_bytes = None;
563 Libvirt.Virterror _ -> None (* ignore transient error *)
566 (* Inactive domains. *)
569 let n = C.num_of_defined_domains conn in
571 if n > 0 then Array.to_list (C.list_defined_domains conn n)
573 List.map (fun name -> name, Inactive) names
575 (* Ignore transient errors, in particular errors from
576 * num_of_defined_domains if it cannot contact xend.
578 | Libvirt.Virterror _ -> [] in
580 doms @ doms_inactive in
582 (* Calculate the CPU time (ns) and %CPU used by each domain. *)
586 (* We have previous CPU info from which to calculate it? *)
587 | name, Active ({ rd_prev_info = Some prev_info } as rd) ->
589 Int64.to_float (rd.rd_info.D.cpu_time -^ prev_info.D.cpu_time) in
590 let percent_cpu = 100. *. cpu_time /. total_cpu in
592 rd_cpu_time = cpu_time;
593 rd_percent_cpu = percent_cpu } in
595 (* For all other domains we can't calculate it, so leave as 0 *)
599 (* Calculate the number of block device read/write requests across
600 * all block devices attached to a domain.
605 (* Do we have stats from the previous slice? *)
606 | name, Active ({ rd_prev_block_stats = ((_::_) as prev_block_stats) }
608 let block_stats = rd.rd_block_stats in (* stats now *)
610 (* Add all the devices together. Throw away device names. *)
611 let prev_block_stats =
612 sum_block_stats (List.map snd prev_block_stats) in
614 sum_block_stats (List.map snd block_stats) in
616 (* Calculate increase in read & write requests. *)
618 block_stats.D.rd_req -^ prev_block_stats.D.rd_req in
620 block_stats.D.wr_req -^ prev_block_stats.D.wr_req in
623 rd_block_rd_reqs = Some read_reqs;
624 rd_block_wr_reqs = Some write_reqs } in
626 (* For all other domains we can't calculate it, so leave as None. *)
630 (* Calculate the same as above for network interfaces across
631 * all network interfaces attached to a domain.
636 (* Do we have stats from the previous slice? *)
637 | name, Active ({ rd_prev_interface_stats =
638 ((_::_) as prev_interface_stats) }
640 let interface_stats = rd.rd_interface_stats in (* stats now *)
642 (* Add all the devices together. Throw away device names. *)
643 let prev_interface_stats =
644 sum_interface_stats (List.map snd prev_interface_stats) in
645 let interface_stats =
646 sum_interface_stats (List.map snd interface_stats) in
648 (* Calculate increase in rx & tx bytes. *)
650 interface_stats.D.rx_bytes -^ prev_interface_stats.D.rx_bytes in
652 interface_stats.D.tx_bytes -^ prev_interface_stats.D.tx_bytes in
655 rd_net_rx_bytes = Some rx_bytes;
656 rd_net_tx_bytes = Some tx_bytes } in
658 (* For all other domains we can't calculate it, so leave as None. *)
662 (* Collect some extra information in PCPUDisplay display_mode. *)
664 if !display_mode = PCPUDisplay then (
665 (* Get the VCPU info and VCPU->PCPU mappings for active domains.
666 * Also cull some data we don't care about.
668 let doms = List.filter_map (
670 | (name, Active rd) ->
672 let domid = rd.rd_domid in
673 let maplen = C.cpumaplen nr_pcpus in
674 let maxinfo = rd.rd_info.D.nr_virt_cpu in
675 let nr_vcpus, vcpu_infos, cpumaps =
676 D.get_vcpus rd.rd_dom maxinfo maplen in
678 (* Got previous vcpu_infos for this domain? *)
679 let prev_vcpu_infos =
680 try Some (Hashtbl.find last_vcpu_info domid)
681 with Not_found -> None in
682 (* Update last_vcpu_info. *)
683 Hashtbl.replace last_vcpu_info domid vcpu_infos;
685 (match prev_vcpu_infos with
686 | Some prev_vcpu_infos
687 when Array.length prev_vcpu_infos = Array.length vcpu_infos ->
688 Some (domid, name, nr_vcpus, vcpu_infos, prev_vcpu_infos,
690 | _ -> None (* ignore missing / unequal length prev_vcpu_infos *)
693 Libvirt.Virterror _ -> None(* ignore transient libvirt errs *)
695 | (_, Inactive) -> None (* ignore inactive doms *)
697 let nr_doms = List.length doms in
699 (* Rearrange the data into a matrix. Major axis (down) is
700 * pCPUs. Minor axis (right) is domains. At each node we store:
701 * cpu_time (on this pCPU only, nanosecs),
702 * average? (if set, then cpu_time is an average because the
703 * vCPU is pinned to more than one pCPU)
704 * running? (if set, we were instantaneously running on this pCPU)
706 let empty_node = (0L, false, false) in
707 let pcpus = Array.make_matrix nr_pcpus nr_doms empty_node in
710 fun di (domid, name, nr_vcpus, vcpu_infos, prev_vcpu_infos,
712 (* Which pCPUs can this dom run on? *)
713 for v = 0 to nr_vcpus-1 do
714 let pcpu = vcpu_infos.(v).D.cpu in (* instantaneous pCPU *)
715 let nr_poss_pcpus = ref 0 in (* how many pcpus can it run on? *)
716 for p = 0 to nr_pcpus-1 do
717 (* vcpu v can reside on pcpu p *)
718 if C.cpu_usable cpumaps maplen v p then
721 let nr_poss_pcpus = Int64.of_int !nr_poss_pcpus in
722 for p = 0 to nr_pcpus-1 do
723 (* vcpu v can reside on pcpu p *)
724 if C.cpu_usable cpumaps maplen v p then
725 let vcpu_time_on_pcpu =
726 vcpu_infos.(v).D.vcpu_time
727 -^ prev_vcpu_infos.(v).D.vcpu_time in
728 let vcpu_time_on_pcpu =
729 vcpu_time_on_pcpu /^ nr_poss_pcpus in
731 (vcpu_time_on_pcpu, nr_poss_pcpus > 1L, p = pcpu)
736 (* Sum the CPU time used by each pCPU, for the %CPU column. *)
737 let pcpus_cpu_time = Array.map (
739 let cpu_time = ref 0L in
740 for di = 0 to Array.length row-1 do
741 let t, _, _ = row.(di) in
742 cpu_time := !cpu_time +^ t
744 Int64.to_float !cpu_time
747 Some (doms, pcpus, pcpus_cpu_time)
751 (* Calculate totals. *)
752 let totals = List.fold_left (
753 fun (count, running, blocked, paused, shutdown, shutoff,
754 crashed, active, inactive,
755 total_cpu_time, total_memory, total_domU_memory) ->
757 | (name, Active rd) ->
758 let test state orig =
759 if rd.rd_info.D.state = state then orig+1 else orig
761 let running = test D.InfoRunning running in
762 let blocked = test D.InfoBlocked blocked in
763 let paused = test D.InfoPaused paused in
764 let shutdown = test D.InfoShutdown shutdown in
765 let shutoff = test D.InfoShutoff shutoff in
766 let crashed = test D.InfoCrashed crashed in
768 let total_cpu_time = total_cpu_time +. rd.rd_cpu_time in
769 let total_memory = total_memory +^ rd.rd_info.D.memory in
770 let total_domU_memory = total_domU_memory +^
771 if rd.rd_domid > 0 then rd.rd_info.D.memory else 0L in
773 (count+1, running, blocked, paused, shutdown, shutoff,
774 crashed, active+1, inactive,
775 total_cpu_time, total_memory, total_domU_memory)
777 | (name, Inactive) -> (* inactive domain *)
778 (count+1, running, blocked, paused, shutdown, shutoff,
779 crashed, active, inactive+1,
780 total_cpu_time, total_memory, total_domU_memory)
781 ) (0,0,0,0,0,0,0,0,0, 0.,0L,0L) doms in
783 (* Update last_time, last_info. *)
785 Hashtbl.clear last_info;
789 let info = rd.rd_info, rd.rd_block_stats, rd.rd_interface_stats in
790 Hashtbl.add last_info rd.rd_domid info
795 time, printable_time,
796 nr_pcpus, total_cpu, total_cpu_per_pcpu,
801 collect, clear_pcpu_display_data
803 (* Redraw the display. *)
805 (* Keep a historical list of %CPU usages. *)
806 let historical_cpu = ref [] in
807 let historical_cpu_last_time = ref (Unix.gettimeofday ()) in
809 (_, _, _, _, node_info, _, _) (* setup *)
811 time, printable_time,
812 nr_pcpus, total_cpu, total_cpu_per_pcpu,
814 pcpu_display) (* state *) ->
817 (* Get the screen/window size. *)
818 let lines, cols = get_size () in
821 mvaddstr top_lineno 0 ("virt-top " ^ printable_time ^ " - ");
823 (* Basic node_info. *)
824 addstr (sprintf "%s %d/%dCPU %dMHz %LdMB "
825 node_info.C.model node_info.C.cpus nr_pcpus node_info.C.mhz
826 (node_info.C.memory /^ 1024L));
827 (* Save the cursor position for when we come to draw the
828 * historical CPU times (down in this function).
830 let stdscr = stdscr () in
831 let historical_cursor = getyx stdscr in
833 (match !display_mode with
834 | TaskDisplay -> (*---------- Showing domains ----------*)
835 (* Sort domains on current sort_order. *)
838 match !sort_order with
840 (fun _ -> 0) (* fallthrough to default name compare *)
843 | Active rd1, Active rd2 ->
844 compare rd2.rd_percent_cpu rd1.rd_percent_cpu
845 | Active _, Inactive -> -1
846 | Inactive, Active _ -> 1
847 | Inactive, Inactive -> 0)
850 | Active { rd_info = info1 }, Active { rd_info = info2 } ->
851 compare info2.D.memory info1.D.memory
852 | Active _, Inactive -> -1
853 | Inactive, Active _ -> 1
854 | Inactive, Inactive -> 0)
857 | Active { rd_info = info1 }, Active { rd_info = info2 } ->
858 compare info2.D.cpu_time info1.D.cpu_time
859 | Active _, Inactive -> -1
860 | Inactive, Active _ -> 1
861 | Inactive, Inactive -> 0)
864 | Active { rd_domid = id1 }, Active { rd_domid = id2 } ->
866 | Active _, Inactive -> -1
867 | Inactive, Active _ -> 1
868 | Inactive, Inactive -> 0)
871 | Active { rd_net_rx_bytes = r1 }, Active { rd_net_rx_bytes = r2 } ->
873 | Active _, Inactive -> -1
874 | Inactive, Active _ -> 1
875 | Inactive, Inactive -> 0)
878 | Active { rd_net_tx_bytes = r1 }, Active { rd_net_tx_bytes = r2 } ->
880 | Active _, Inactive -> -1
881 | Inactive, Active _ -> 1
882 | Inactive, Inactive -> 0)
885 | Active { rd_block_rd_reqs = r1 }, Active { rd_block_rd_reqs = r2 } ->
887 | Active _, Inactive -> -1
888 | Inactive, Active _ -> 1
889 | Inactive, Inactive -> 0)
892 | Active { rd_block_wr_reqs = r1 }, Active { rd_block_wr_reqs = r2 } ->
894 | Active _, Inactive -> -1
895 | Inactive, Active _ -> 1
896 | Inactive, Inactive -> 0)
898 let cmp (name1, dom1) (name2, dom2) =
899 let r = cmp (dom1, dom2) in
901 else compare name1 name2
903 List.sort ~cmp doms in
907 mvaddstr header_lineno 0
908 (pad cols " ID S RDRQ WRRQ RXBY TXBY %CPU %MEM TIME NAME");
911 let rec loop lineno = function
913 | (name, Active rd) :: doms ->
914 if lineno < lines then (
915 let state = show_state rd.rd_info.D.state in
916 let rd_req = show_int64_option rd.rd_block_rd_reqs in
917 let wr_req = show_int64_option rd.rd_block_wr_reqs in
918 let rx_bytes = show_int64_option rd.rd_net_rx_bytes in
919 let tx_bytes = show_int64_option rd.rd_net_tx_bytes in
920 let percent_cpu = show_percent rd.rd_percent_cpu in
922 100L *^ rd.rd_info.D.memory /^ node_info.C.memory in
923 let percent_mem = Int64.to_float percent_mem in
924 let percent_mem = show_percent percent_mem in
925 let time = show_time rd.rd_info.D.cpu_time in
927 let line = sprintf "%5d %c %s %s %s %s %s %s %s %s"
928 rd.rd_domid state rd_req wr_req rx_bytes tx_bytes
929 percent_cpu percent_mem time name in
930 let line = pad cols line in
931 mvaddstr lineno 0 line;
934 | (name, Inactive) :: doms -> (* inactive domain *)
935 if lineno < lines then (
940 let line = pad cols line in
941 mvaddstr lineno 0 line;
945 loop domains_lineno doms
947 | PCPUDisplay -> (*---------- Showing physical CPUs ----------*)
948 let doms, pcpus, pcpus_cpu_time =
949 match pcpu_display with
951 | None -> failwith "internal error: no pcpu_display data" in
953 (* Display the pCPUs. *)
957 fun (_, name, _, _, _, _, _) ->
958 let len = String.length name in
959 let width = max (len+1) 7 in
964 mvaddstr header_lineno 0 (pad cols ("PHYCPU %CPU " ^ dom_names));
969 mvaddstr (p+domains_lineno) 0 (sprintf "%4d " p);
970 let cpu_time = pcpus_cpu_time.(p) in (* ns used on this CPU *)
971 let percent_cpu = 100. *. cpu_time /. total_cpu_per_pcpu in
972 addstr (show_percent percent_cpu);
976 fun di (domid, name, _, _, _, _, _) ->
977 let t, is_average, is_running = pcpus.(p).(di) in
978 let len = String.length name in
979 let width = max (len+1) 7 in
983 let t = Int64.to_float t in
984 let percent = 100. *. t /. total_cpu_per_pcpu in
985 sprintf "%s%c%c " (show_percent percent)
986 (if is_average then '=' else ' ')
987 (if is_running then '#' else ' ')
989 addstr (pad width str);
994 | NetDisplay -> (*---------- Showing network interfaces ----------*)
995 (* Only care about active domains. *)
996 let doms = List.filter_map (
998 | (name, Active rd) -> Some (name, rd)
999 | (_, Inactive) -> None
1002 (* For each domain we have a list of network interfaces seen
1003 * this slice, and seen in the previous slice, which we now
1004 * match up to get a list of (domain, interface) for which
1005 * we have current & previous knowledge. (And ignore the rest).
1013 (* Have prev slice stats for this device? *)
1015 List.assoc dev rd.rd_prev_interface_stats in
1016 Some (dev, name, rd, stats, prev_stats)
1017 with Not_found -> None
1018 ) rd.rd_interface_stats
1021 (* Finally we have a list of:
1022 * device name, domain name, rd_* stuff, curr stats, prev stats.
1024 let devs : (string * string * rd_active *
1025 D.interface_stats * D.interface_stats) list =
1026 List.flatten devs in
1028 (* Difference curr slice & prev slice. *)
1029 let devs = List.map (
1030 fun (dev, name, rd, curr, prev) ->
1031 dev, name, rd, diff_interface_stats curr prev
1034 (* Sort by current sort order, but map some of the standard
1035 * sort orders into ones which makes sense here.
1039 match !sort_order with
1041 (fun _ -> 0) (* fallthrough to default name compare *)
1043 (fun (_, { rd_domid = id1 }, _, { rd_domid = id2 }) ->
1045 | Processor | Memory | Time | BlockRdRq | BlockWrRq
1046 (* fallthrough to RXBY comparison. *)
1048 (fun ({ D.rx_bytes = b1 }, _, { D.rx_bytes = b2 }, _) ->
1051 (fun ({ D.tx_bytes = b1 }, _, { D.tx_bytes = b2 }, _) ->
1054 let cmp (dev1, name1, rd1, stats1) (dev2, name2, rd2, stats2) =
1055 let r = cmp (stats1, rd1, stats2, rd2) in
1057 else compare (dev1, name1) (dev2, name2)
1059 List.sort ~cmp devs in
1061 (* Print the header for network devices. *)
1063 mvaddstr header_lineno 0
1064 (pad cols " ID S RXBY TXBY RXPK TXPK DOMAIN INTERFACE");
1067 (* Print domains and devices. *)
1068 let rec loop lineno = function
1070 | (dev, name, rd, stats) :: devs ->
1071 if lineno < lines then (
1072 let state = show_state rd.rd_info.D.state in
1074 if stats.D.rx_bytes >= 0L
1075 then show_int64 stats.D.rx_bytes
1078 if stats.D.tx_bytes >= 0L
1079 then show_int64 stats.D.tx_bytes
1082 if stats.D.rx_packets >= 0L
1083 then show_int64 stats.D.rx_packets
1086 if stats.D.tx_packets >= 0L
1087 then show_int64 stats.D.tx_packets
1090 let line = sprintf "%5d %c %s %s %s %s %-12s %s"
1093 rx_packets tx_packets
1094 (pad 12 name) dev in
1095 let line = pad cols line in
1096 mvaddstr lineno 0 line;
1097 loop (lineno+1) devs
1100 loop domains_lineno devs
1102 | BlockDisplay -> (*---------- Showing block devices ----------*)
1103 (* Only care about active domains. *)
1104 let doms = List.filter_map (
1106 | (name, Active rd) -> Some (name, rd)
1107 | (_, Inactive) -> None
1110 (* For each domain we have a list of block devices seen
1111 * this slice, and seen in the previous slice, which we now
1112 * match up to get a list of (domain, device) for which
1113 * we have current & previous knowledge. (And ignore the rest).
1121 (* Have prev slice stats for this device? *)
1123 List.assoc dev rd.rd_prev_block_stats in
1124 Some (dev, name, rd, stats, prev_stats)
1125 with Not_found -> None
1129 (* Finally we have a list of:
1130 * device name, domain name, rd_* stuff, curr stats, prev stats.
1132 let devs : (string * string * rd_active *
1133 D.block_stats * D.block_stats) list =
1134 List.flatten devs in
1136 (* Difference curr slice & prev slice. *)
1137 let devs = List.map (
1138 fun (dev, name, rd, curr, prev) ->
1139 dev, name, rd, diff_block_stats curr prev
1142 (* Sort by current sort order, but map some of the standard
1143 * sort orders into ones which makes sense here.
1147 match !sort_order with
1149 (fun _ -> 0) (* fallthrough to default name compare *)
1151 (fun (_, { rd_domid = id1 }, _, { rd_domid = id2 }) ->
1153 | Processor | Memory | Time | NetRX | NetTX
1154 (* fallthrough to RDRQ comparison. *)
1156 (fun ({ D.rd_req = b1 }, _, { D.rd_req = b2 }, _) ->
1159 (fun ({ D.wr_req = b1 }, _, { D.wr_req = b2 }, _) ->
1162 let cmp (dev1, name1, rd1, stats1) (dev2, name2, rd2, stats2) =
1163 let r = cmp (stats1, rd1, stats2, rd2) in
1165 else compare (dev1, name1) (dev2, name2)
1167 List.sort ~cmp devs in
1169 (* Print the header for block devices. *)
1171 mvaddstr header_lineno 0
1172 (pad cols " ID S RDBY WRBY RDRQ WRRQ DOMAIN DEVICE");
1175 (* Print domains and devices. *)
1176 let rec loop lineno = function
1178 | (dev, name, rd, stats) :: devs ->
1179 if lineno < lines then (
1180 let state = show_state rd.rd_info.D.state in
1182 if stats.D.rd_bytes >= 0L
1183 then show_int64 stats.D.rd_bytes
1186 if stats.D.wr_bytes >= 0L
1187 then show_int64 stats.D.wr_bytes
1190 if stats.D.rd_req >= 0L
1191 then show_int64 stats.D.rd_req
1194 if stats.D.wr_req >= 0L
1195 then show_int64 stats.D.wr_req
1198 let line = sprintf "%5d %c %s %s %s %s %-12s %s"
1202 (pad 12 name) dev in
1203 let line = pad cols line in
1204 mvaddstr lineno 0 line;
1205 loop (lineno+1) devs
1208 loop domains_lineno devs
1209 ); (* end of display_mode conditional section *)
1211 let (count, running, blocked, paused, shutdown, shutoff,
1212 crashed, active, inactive,
1213 total_cpu_time, total_memory, total_domU_memory) = totals in
1215 mvaddstr summary_lineno 0
1216 (sprintf "%d domains, %d active, %d running, %d sleeping, %d paused, %d inactive D:%d O:%d X:%d"
1217 count active running blocked paused inactive shutdown shutoff
1220 (* Total %CPU used, and memory summary. *)
1221 let percent_cpu = 100. *. total_cpu_time /. total_cpu in
1222 mvaddstr (summary_lineno+1) 0
1223 (sprintf "CPU: %2.1f%% Mem: %Ld MB (%Ld MB by guests)"
1224 percent_cpu (total_memory /^ 1024L) (total_domU_memory /^ 1024L));
1226 (* Time to grab another historical %CPU for the list? *)
1227 if time >= !historical_cpu_last_time +. float !historical_cpu_delay
1229 historical_cpu := percent_cpu :: List.take 10 !historical_cpu;
1230 historical_cpu_last_time := time
1233 (* Display historical CPU time. *)
1235 let x, y = historical_cursor in (* Yes, it's a bug in ocaml-curses *)
1236 let maxwidth = cols - x in
1239 (List.map (sprintf "%2.1f%%") !historical_cpu) in
1240 let line = pad maxwidth line in
1244 move message_lineno 0; (* Park cursor in message area, as with top. *)
1245 refresh (); (* Refresh the display. *)
1248 (* Write CSV header row. *)
1249 let write_csv_header () =
1251 [ "Hostname"; "Time"; "Arch"; "Physical CPUs";
1252 "Count"; "Running"; "Blocked"; "Paused"; "Shutdown";
1253 "Shutoff"; "Crashed"; "Active"; "Inactive";
1254 "%CPU"; "Total memory (KB)"; "Total guest memory (KB)";
1255 "Total CPU time (ns)" ] @
1256 (* These fields are repeated for each domain: *)
1257 [ "Domain ID"; "Domain name"; ] @
1258 (if !csv_cpu then [ "CPU (ns)"; "%CPU"; ] else []) @
1259 (if !csv_block then [ "Block RDRQ"; "Block WRRQ"; ] else []) @
1260 (if !csv_net then [ "Net RXBY"; "Net TXBY" ] else [])
1263 (* Write summary data to CSV file. *)
1265 (_, _, _, _, node_info, hostname, _) (* setup *)
1268 nr_pcpus, total_cpu, _,
1272 (* The totals / summary fields. *)
1273 let (count, running, blocked, paused, shutdown, shutoff,
1274 crashed, active, inactive,
1275 total_cpu_time, total_memory, total_domU_memory) = totals in
1277 let percent_cpu = 100. *. total_cpu_time /. total_cpu in
1279 let summary_fields = [
1280 hostname; printable_time; node_info.C.model; string_of_int nr_pcpus;
1281 string_of_int count; string_of_int running; string_of_int blocked;
1282 string_of_int paused; string_of_int shutdown; string_of_int shutoff;
1283 string_of_int crashed; string_of_int active; string_of_int inactive;
1284 sprintf "%2.1f" percent_cpu;
1285 Int64.to_string total_memory; Int64.to_string total_domU_memory;
1286 Int64.to_string (Int64.of_float total_cpu_time)
1291 * Sort them by ID so that the list of relatively stable. Ignore
1294 let doms = List.filter_map (
1296 | _, Inactive -> None (* Ignore inactive domains. *)
1297 | name, Active rd -> Some (name, rd)
1299 let cmp (_, { rd_domid = rd_domid1 }) (_, { rd_domid = rd_domid2 }) =
1300 compare rd_domid1 rd_domid2
1302 let doms = List.sort ~cmp doms in
1304 let string_of_int64_option = Option.map_default Int64.to_string "" in
1306 let domain_fields = List.map (
1307 fun (domname, rd) ->
1308 [ string_of_int rd.rd_domid; domname ] @
1310 string_of_float rd.rd_cpu_time; string_of_float rd.rd_percent_cpu
1312 (if !csv_block then [
1313 string_of_int64_option rd.rd_block_rd_reqs;
1314 string_of_int64_option rd.rd_block_wr_reqs;
1317 string_of_int64_option rd.rd_net_rx_bytes;
1318 string_of_int64_option rd.rd_net_tx_bytes;
1321 let domain_fields = List.flatten domain_fields in
1323 (!csv_write) (summary_fields @ domain_fields)
1326 let rec main_loop ((_, batch_mode, script_mode, csv_enabled, _, _, _)
1328 if csv_enabled then write_csv_header ();
1331 let state = collect setup in (* Collect stats. *)
1332 if not script_mode then redraw setup state; (* Redraw display. *)
1333 if csv_enabled then append_csv setup state; (* Update CSV file. *)
1335 (* Clear up unused virDomainPtr objects. *)
1338 if not batch_mode && not script_mode then
1340 else (* Batch mode or script mode - just sleep, ignore keys. *)
1341 Unix.sleep (!delay / 1000);
1343 (* Max iterations? *)
1344 if !iterations >= 0 then (
1346 if !iterations = 0 then quit := true
1350 and get_key_press setup =
1351 (* Read the next key, waiting up to !delay milliseconds. *)
1354 timeout (-1); (* Reset to blocking mode. *)
1356 if k >= 0 && k <> 32 (* ' ' *) && k <> 12 (* ^L *) && k <> Key.resize
1358 if k = Char.code 'q' then quit := true
1359 else if k = Char.code 'h' then show_help setup
1360 else if k = Char.code 's' || k = Char.code 'd' then change_delay ()
1361 else if k = Char.code 'M' then sort_order := Memory
1362 else if k = Char.code 'P' then sort_order := Processor
1363 else if k = Char.code 'T' then sort_order := Time
1364 else if k = Char.code 'N' then sort_order := DomainID
1365 else if k = Char.code 'F' then change_sort_order ()
1366 else if k = Char.code '0' then set_tasks_display ()
1367 else if k = Char.code '1' then toggle_pcpu_display ()
1368 else if k = Char.code '2' then toggle_net_display ()
1369 else if k = Char.code '3' then toggle_block_display ()
1370 else if k = Char.code 'W' then write_init_file ()
1371 else unknown_command k
1374 and change_delay () =
1375 print_msg (sprintf "Change delay from %.1f to: " (float !delay /. 1000.));
1376 let str = get_string 16 in
1377 (* Try to parse the number. *)
1380 let newdelay = float_of_string str in
1381 if newdelay <= 0. then (
1382 print_msg "Delay must be > 0"; true
1384 delay := int_of_float (newdelay *. 1000.); false
1387 Failure "float_of_string" ->
1388 print_msg "Not a valid number"; true in
1389 sleep (if error then 2 else 1)
1391 and change_sort_order () =
1393 let lines, cols = get_size () in
1395 mvaddstr top_lineno 0 "Set sort order for main display";
1396 mvaddstr summary_lineno 0 "Type key or use up and down cursor keys.";
1399 mvaddstr header_lineno 0 (pad cols "KEY Sort field");
1402 let accelerator_key = function
1403 | Memory -> "(key: M)"
1404 | Processor -> "(key: P)"
1405 | Time -> "(key: T)"
1406 | DomainID -> "(key: N)"
1407 | _ -> (* all others have to be changed from here *) ""
1410 let rec key_of_int = function
1411 | i when i < 10 -> Char.chr (i + Char.code '0')
1412 | i when i < 20 -> Char.chr (i + Char.code 'a')
1414 and int_of_key = function
1415 | k when k >= 0x30 && k <= 0x39 (* '0' - '9' *) -> k - 0x30
1416 | k when k >= 0x61 && k <= 0x7a (* 'a' - 'j' *) -> k - 0x61 + 10
1417 | k when k >= 0x41 && k <= 0x6a (* 'A' - 'J' *) -> k - 0x41 + 10
1421 (* Display possible sort fields. *)
1422 let selected_index = ref 0 in
1425 let selected = !sort_order = ord in
1426 if selected then selected_index := i;
1427 mvaddstr (domains_lineno+i) 0
1428 (sprintf " %c %s %s %s"
1429 (key_of_int i) (if selected then "*" else " ")
1430 (printable_sort_order ord)
1431 (accelerator_key ord))
1434 move message_lineno 0;
1437 if k >= 0 && k <> 32 && k <> Char.code 'q' && k <> 13 then (
1438 let new_order, loop =
1439 (* Redraw the display. *)
1440 if k = 12 (* ^L *) then None, true
1441 (* Make the UP and DOWN arrow keys do something useful. *)
1442 else if k = Key.up then (
1443 if !selected_index > 0 then
1444 Some (List.nth all_sort_fields (!selected_index-1)), true
1448 else if k = Key.down then (
1449 if !selected_index < List.length all_sort_fields - 1 then
1450 Some (List.nth all_sort_fields (!selected_index+1)), true
1454 (* Also understand the regular accelerator keys. *)
1455 else if k = Char.code 'M' then
1457 else if k = Char.code 'P' then
1458 Some Processor, false
1459 else if k = Char.code 'T' then
1461 else if k = Char.code 'N' then
1462 Some DomainID, false
1464 (* It's one of the KEYs. *)
1465 let i = int_of_key k in
1466 if i >= 0 && i < List.length all_sort_fields then
1467 Some (List.nth all_sort_fields i), false
1472 (match new_order with
1475 sort_order := new_order;
1476 print_msg (sprintf "Sort order changed to: %s"
1477 (printable_sort_order new_order));
1478 if not loop then sleep 1
1481 if loop then change_sort_order ()
1484 (* Note: We need to clear_pcpu_display_data every time
1485 * we _leave_ PCPUDisplay mode.
1487 and set_tasks_display () = (* key 0 *)
1488 if !display_mode = PCPUDisplay then clear_pcpu_display_data ();
1489 display_mode := TaskDisplay
1491 and toggle_pcpu_display () = (* key 1 *)
1493 match !display_mode with
1494 | TaskDisplay | NetDisplay | BlockDisplay -> PCPUDisplay
1495 | PCPUDisplay -> clear_pcpu_display_data (); TaskDisplay
1497 and toggle_net_display () = (* key 2 *)
1499 match !display_mode with
1500 | PCPUDisplay -> clear_pcpu_display_data (); NetDisplay
1501 | TaskDisplay | BlockDisplay -> NetDisplay
1502 | NetDisplay -> TaskDisplay
1504 and toggle_block_display () = (* key 3 *)
1506 match !display_mode with
1507 | PCPUDisplay -> clear_pcpu_display_data (); BlockDisplay
1508 | TaskDisplay | NetDisplay -> BlockDisplay
1509 | BlockDisplay -> TaskDisplay
1511 (* Write an init file. *)
1512 and write_init_file () =
1513 match !init_file with
1514 | NoInitFile -> () (* Do nothing if --no-init-file *)
1515 | DefaultInitFile ->
1516 let home = try Sys.getenv "HOME" with Not_found -> "/" in
1517 let filename = home // ".virt-toprc" in
1518 _write_init_file filename
1519 | InitFile filename ->
1520 _write_init_file filename
1522 and _write_init_file filename =
1524 (* Create the new file as filename.new. *)
1525 let chan = open_out (filename ^ ".new") in
1527 let time = Unix.gettimeofday () in
1528 let tm = Unix.localtime time in
1529 let printable_date_time =
1530 sprintf "%04d-%02d-%02d %02d:%02d:%02d"
1531 (tm.Unix.tm_year + 1900) (tm.Unix.tm_mon+1) tm.Unix.tm_mday
1532 tm.Unix.tm_hour tm.Unix.tm_min tm.Unix.tm_sec in
1535 let uid = Unix.geteuid () in
1536 (Unix.getpwuid uid).Unix.pw_name
1538 Not_found -> "unknown" in
1541 let nl () = fp chan "\n" in
1542 fp chan "# .virt-toprc virt-top configuration file\n";
1543 fp chan "# generated on %s by %s\n" printable_date_time username;
1545 fp chan "display %s\n" (cli_of_display !display_mode);
1546 fp chan "delay %g\n" (float !delay /. 1000.);
1547 fp chan "hist-cpu %d\n" !historical_cpu_delay;
1548 if !iterations <> -1 then fp chan "iterations %d\n" !iterations;
1549 fp chan "sort %s\n" (cli_of_sort_order !sort_order);
1552 | Some uri -> fp chan "connect %s\n" uri
1554 if !batch_mode = true then fp chan "batch true\n";
1555 if !secure_mode = true then fp chan "secure true\n";
1557 fp chan "# To send debug and error messages to a file, uncomment next line\n";
1558 fp chan "#debug virt-top.out\n";
1560 fp chan "# Enable CSV output to the named file\n";
1561 fp chan "#csv virt-top.csv\n";
1563 fp chan "# To protect this file from being overwritten, uncomment next line\n";
1564 fp chan "#overwrite-init-file false\n";
1568 (* If the file exists, rename it as filename.old. *)
1569 (try Unix.rename filename (filename ^ ".old")
1570 with Unix.Unix_error _ -> ());
1572 (* Rename filename.new to filename. *)
1573 Unix.rename (filename ^ ".new") filename;
1575 print_msg (sprintf "Wrote settings to %s" filename); sleep 2
1577 | Sys_error err -> print_msg "Error: %s"; sleep 2
1578 | Unix.Unix_error (err, fn, str) ->
1579 print_msg (sprintf "Error: %s %s %s" (Unix.error_message err) fn str);
1582 and show_help (_, _, _, _, _, hostname,
1583 (libvirt_major, libvirt_minor, libvirt_release)) =
1586 (* Get the screen/window size. *)
1587 let lines, cols = get_size () in
1589 (* Banner at the top of the screen. *)
1591 sprintf "virt-top %s (libvirt %d.%d.%d) by Red Hat"
1592 Libvirt_version.version libvirt_major libvirt_minor libvirt_release in
1593 let banner = pad cols banner in
1595 mvaddstr 0 0 banner;
1600 (sprintf "Delay: %.1f secs; Batch: %s; Secure: %s; Sort: %s"
1601 (float !delay /. 1000.)
1602 (if !batch_mode then "On" else "Off")
1603 (if !secure_mode then "On" else "Off")
1604 (printable_sort_order !sort_order));
1606 (sprintf "Connect: %s; Hostname: %s"
1607 (match !uri with None -> "default" | Some s -> s)
1610 (* Misc keys on left. *)
1611 let banner = pad 38 "MAIN KEYS" in
1613 mvaddstr header_lineno 1 banner;
1617 let lineno = ref domains_lineno in
1618 fun () -> let i = !lineno in incr lineno; i
1620 let key keys description =
1621 let lineno = get_lineno () in
1622 move lineno 1; attron A.bold; addstr keys; attroff A.bold;
1623 move lineno 10; addstr description; ()
1625 key "space ^L" "Update display";
1627 key "d s" "Set update interval";
1631 ignore (get_lineno ());
1632 let banner = pad 38 "SORTING" in
1634 mvaddstr (get_lineno ()) 1 banner;
1637 key "P" "Sort by %CPU";
1638 key "M" "Sort by %MEM";
1639 key "T" "Sort by TIME";
1640 key "N" "Sort by ID";
1641 key "F" "Select sort field";
1643 (* Display modes on right. *)
1644 let banner = pad 39 "DISPLAY MODES" in
1646 mvaddstr header_lineno 40 banner;
1650 let lineno = ref domains_lineno in
1651 fun () -> let i = !lineno in incr lineno; i
1653 let key keys description =
1654 let lineno = get_lineno () in
1655 move lineno 40; attron A.bold; addstr keys; attroff A.bold;
1656 move lineno 49; addstr description; ()
1658 key "0" "Domains display";
1659 key "1" "Toggle physical CPUs";
1660 key "2" "Toggle network interfaces";
1661 key "3" "Toggle block devices";
1663 (* Update screen and wait for key press. *)
1664 mvaddstr (lines-1) 0
1665 "More help in virt-top(1) man page. Press any key to return.";
1669 and unknown_command k =
1670 print_msg "Unknown command - try 'h' for help";