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.
24 open Virt_top_gettext.Gettext
27 module C = Libvirt.Connect
28 module D = Libvirt.Domain
29 module N = Libvirt.Network
31 let rcfile = ".virt-toprc"
33 (* Hook for XML support (see virt_top_xml.ml). *)
34 let parse_device_xml : (int -> [>`R] D.t -> string list * string list) ref =
39 (* Hooks for CSV support (see virt_top_csv.ml). *)
40 let csv_start : (string -> unit) ref =
42 fun _ -> failwith (s_ "virt-top was compiled without support for CSV files")
44 let csv_write : (string list -> unit) ref =
49 (* Hook for calendar support (see virt_top_calendar.ml). *)
50 let parse_date_time : (string -> float) ref =
53 failwith (s_ "virt-top was compiled without support for dates and times")
58 | DomainID | DomainName | Processor | Memory | Time
59 | NetRX | NetTX | BlockRdRq | BlockWrRq
60 let all_sort_fields = [
61 DomainID; DomainName; Processor; Memory; Time;
62 NetRX; NetTX; BlockRdRq; BlockWrRq
64 let printable_sort_order = function
65 | Processor -> s_ "%CPU"
67 | Time -> s_ "TIME (CPU time)"
68 | DomainID -> s_ "Domain ID"
69 | DomainName -> s_ "Domain name"
70 | NetRX -> s_ "Net RX bytes"
71 | NetTX -> s_ "Net TX bytes"
72 | BlockRdRq -> s_ "Block read reqs"
73 | BlockWrRq -> s_ "Block write reqs"
74 let sort_order_of_cli = function
75 | "cpu" | "processor" -> Processor
76 | "mem" | "memory" -> Memory
79 | "name" -> DomainName
80 | "netrx" -> NetRX | "nettx" -> NetTX
81 | "blockrdrq" -> BlockRdRq | "blockwrrq" -> BlockWrRq
84 (sprintf (f_ "%s: sort order should be: %s")
85 str "cpu|mem|time|id|name|netrx|nettx|blockrdrq|blockwrrq")
86 let cli_of_sort_order = function
91 | DomainName -> "name"
94 | BlockRdRq -> "blockrdrq"
95 | BlockWrRq -> "blockwrrq"
97 (* Current major display mode: TaskDisplay is the normal display. *)
98 type display = TaskDisplay | PCPUDisplay | BlockDisplay | NetDisplay
100 let display_of_cli = function
101 | "task" -> TaskDisplay
102 | "pcpu" -> PCPUDisplay
103 | "block" -> BlockDisplay
104 | "net" -> NetDisplay
107 (sprintf (f_ "%s: display should be %s")
108 str "task|pcpu|block|net")
109 let cli_of_display = function
110 | TaskDisplay -> "task"
111 | PCPUDisplay -> "pcpu"
112 | BlockDisplay -> "block"
113 | NetDisplay -> "net"
116 type init_file = NoInitFile | DefaultInitFile | InitFile of string
120 let delay = ref 3000 (* milliseconds *)
121 let historical_cpu_delay = ref 20 (* secs *)
122 let iterations = ref (-1)
123 let end_time = ref None
124 let batch_mode = ref false
125 let secure_mode = ref false
126 let sort_order = ref Processor
127 let display_mode = ref TaskDisplay
129 let debug_file = ref ""
130 let csv_enabled = ref false
131 let csv_cpu = ref true
132 let csv_block = ref true
133 let csv_net = ref true
134 let init_file = ref DefaultInitFile
135 let script_mode = ref false
137 (* Tuple of never-changing data returned by start_up function. *)
139 Libvirt.ro C.t * bool * bool * bool * C.node_info * string *
142 (* Function to read command line arguments and go into curses mode. *)
144 (* Read command line arguments. *)
145 let rec set_delay newdelay =
146 if newdelay <= 0. then
147 failwith (s_ "-d: cannot set a negative delay");
148 delay := int_of_float (newdelay *. 1000.)
149 and set_uri = function "" -> uri := None | u -> uri := Some u
150 and set_sort order = sort_order := sort_order_of_cli order
151 and set_pcpu_mode () = display_mode := PCPUDisplay
152 and set_net_mode () = display_mode := NetDisplay
153 and set_block_mode () = display_mode := BlockDisplay
154 and set_csv filename =
155 (!csv_start) filename;
157 and no_init_file () = init_file := NoInitFile
158 and set_init_file filename = init_file := InitFile filename
159 and set_end_time time = end_time := Some ((!parse_date_time) time)
161 let argspec = Arg.align [
162 "-1", Arg.Unit set_pcpu_mode,
163 " " ^ s_ "Start by displaying pCPUs (default: tasks)";
164 "-2", Arg.Unit set_net_mode,
165 " " ^ s_ "Start by displaying network interfaces";
166 "-3", Arg.Unit set_block_mode,
167 " " ^ s_ "Start by displaying block devices";
168 "-b", Arg.Set batch_mode,
169 " " ^ s_ "Batch mode";
170 "-c", Arg.String set_uri,
171 "uri " ^ s_ "Connect to URI (default: Xen)";
172 "--connect", Arg.String set_uri,
173 "uri " ^ s_ "Connect to URI (default: Xen)";
174 "--csv", Arg.String set_csv,
175 "file " ^ s_ "Log statistics to CSV file";
176 "--no-csv-cpu", Arg.Clear csv_cpu,
177 " " ^ s_ "Disable CPU stats in CSV";
178 "--no-csv-block", Arg.Clear csv_block,
179 " " ^ s_ "Disable block device stats in CSV";
180 "--no-csv-net", Arg.Clear csv_net,
181 " " ^ s_ "Disable net stats in CSV";
182 "-d", Arg.Float set_delay,
183 "delay " ^ s_ "Delay time interval (seconds)";
184 "--debug", Arg.Set_string debug_file,
185 "file " ^ s_ "Send debug messages to file";
186 "--end-time", Arg.String set_end_time,
187 "time " ^ s_ "Exit at given time";
188 "--hist-cpu", Arg.Set_int historical_cpu_delay,
189 "secs " ^ s_ "Historical CPU delay";
190 "--init-file", Arg.String set_init_file,
191 "file " ^ s_ "Set name of init file";
192 "--no-init-file", Arg.Unit no_init_file,
193 " " ^ s_ "Do not read init file";
194 "-n", Arg.Set_int iterations,
195 "iterations " ^ s_ "Number of iterations to run";
196 "-o", Arg.String set_sort,
197 "sort " ^ sprintf (f_ "Set sort order (%s)") "cpu|mem|time|id|name";
198 "-s", Arg.Set secure_mode,
199 " " ^ s_ "Secure (\"kiosk\") mode";
200 "--script", Arg.Set script_mode,
201 " " ^ s_ "Run from a script (no user interface)";
204 raise (Arg.Bad (sprintf (f_ "%s: unknown parameter") str)) in
205 let usage_msg = s_ "virt-top : a 'top'-like utility for virtualization
211 Arg.parse argspec anon_fun usage_msg;
213 (* Read the init file. *)
214 let try_to_read_init_file filename =
215 let config = read_config_file filename in
218 | _, "display", mode -> display_mode := display_of_cli mode
219 | _, "delay", secs -> set_delay (float_of_string secs)
220 | _, "hist-cpu", secs -> historical_cpu_delay := int_of_string secs
221 | _, "iterations", n -> iterations := int_of_string n
222 | _, "sort", order -> set_sort order
223 | _, "connect", uri -> set_uri uri
224 | _, "debug", filename -> debug_file := filename
225 | _, "csv", filename -> set_csv filename
226 | _, "csv-cpu", b -> csv_cpu := bool_of_string b
227 | _, "csv-block", b -> csv_block := bool_of_string b
228 | _, "csv-net", b -> csv_net := bool_of_string b
229 | _, "batch", b -> batch_mode := bool_of_string b
230 | _, "secure", b -> secure_mode := bool_of_string b
231 | _, "script", b -> script_mode := bool_of_string b
232 | _, "end-time", t -> set_end_time t
233 | _, "overwrite-init-file", "false" -> no_init_file ()
235 eprintf (f_ "%s:%d: configuration item ``%s'' ignored\n%!")
239 (match !init_file with
242 let home = try Sys.getenv "HOME" with Not_found -> "/" in
243 let filename = home // rcfile in
244 try_to_read_init_file filename
245 | InitFile filename ->
246 try_to_read_init_file filename
249 (* Connect to the hypervisor before going into curses mode, since
250 * this is the most likely thing to fail.
254 try C.connect_readonly ?name ()
256 Libvirt.Virterror err ->
257 prerr_endline (Libvirt.Virterror.to_string err);
258 (* If non-root and no explicit connection URI, print a warning. *)
259 if Unix.geteuid () <> 0 && name = None then (
260 print_endline (s_ "NB: If you want to monitor a local Xen hypervisor, you usually need to be root");
264 (* Get the node_info. This never changes, right? So we get it just once. *)
265 let node_info = C.get_node_info conn in
267 (* Hostname and libvirt library version also don't change. *)
269 try C.get_hostname conn
271 (* qemu:/// and other URIs didn't support virConnectGetHostname until
272 * libvirt 0.3.3. Before that they'd throw a virterror. *)
273 | Libvirt.Virterror _
274 | Libvirt.Not_supported "virConnectGetHostname" -> "unknown" in
276 let libvirt_version =
277 let v, _ = Libvirt.get_version () in
278 v / 1_000_000, (v / 1_000) mod 1_000, v mod 1_000 in
280 (* Open debug file if specified.
281 * NB: Do this just before jumping into curses mode.
283 (match !debug_file with
284 | "" -> (* No debug file specified, send stderr to /dev/null unless
285 * we're in script mode.
287 if not !script_mode then (
288 let fd = Unix.openfile "/dev/null" [Unix.O_WRONLY] 0o644 in
289 Unix.dup2 fd Unix.stderr;
292 | filename -> (* Send stderr to the named file. *)
294 Unix.openfile filename [Unix.O_WRONLY;Unix.O_CREAT;Unix.O_TRUNC]
296 Unix.dup2 fd Unix.stderr;
300 (* Curses voodoo (see ncurses(3)). *)
301 if not !script_mode then (
306 let stdscr = stdscr () in
307 intrflush stdscr false;
312 (* This tuple of static information is called 'setup' in other parts
313 * of this program, and is passed to other functions such as redraw and
314 * main_loop. See virt_top_main.ml.
317 !batch_mode, !script_mode, !csv_enabled, (* immutable modes *)
318 node_info, hostname, libvirt_version (* info that doesn't change *)
321 (* Show a domain state (the 'S' column). *)
322 let show_state = function
323 | D.InfoNoState -> '?'
324 | D.InfoRunning -> 'R'
325 | D.InfoBlocked -> 'S'
326 | D.InfoPaused -> 'P'
327 | D.InfoShutdown -> 'D'
328 | D.InfoShutoff -> 'O'
329 | D.InfoCrashed -> 'X'
331 (* Sleep in seconds. *)
332 let sleep = Unix.sleep
334 (* Sleep in milliseconds. *)
336 ignore (Unix.select [] [] [] (float n /. 1000.))
338 (* The curses getstr/getnstr functions are just weird.
339 * This helper function also enables echo temporarily.
341 let get_string maxlen =
343 let str = String.create maxlen in
344 let ok = getstr str in (* Safe because binding calls getnstr. *)
348 (* Chop at first '\0'. *)
350 let i = String.index str '\000' in
353 Not_found -> str (* it is full maxlen bytes *)
358 let summary_lineno = 1 (* this takes 2 lines *)
359 let message_lineno = 3
360 let header_lineno = 4
361 let domains_lineno = 5
363 (* Print in the "message area". *)
364 let clear_msg () = move message_lineno 0; clrtoeol ()
365 let print_msg str = clear_msg (); mvaddstr message_lineno 0 str; ()
367 (* Intermediate "domain + stats" structure that we use to collect
368 * everything we know about a domain within the collect function.
370 type rd_domain = Inactive | Active of rd_active
372 rd_domid : int; (* Domain ID. *)
373 rd_dom : [`R] D.t; (* Domain object. *)
374 rd_info : D.info; (* Domain CPU info now. *)
375 rd_block_stats : (string * D.block_stats) list;
376 (* Domain block stats now. *)
377 rd_interface_stats : (string * D.interface_stats) list;
378 (* Domain net stats now. *)
379 rd_prev_info : D.info option; (* Domain CPU info previously. *)
380 rd_prev_block_stats : (string * D.block_stats) list;
381 (* Domain block stats prev. *)
382 rd_prev_interface_stats : (string * D.interface_stats) list;
383 (* Domain interface stats prev. *)
384 (* The following are since the last slice, or 0 if cannot be calculated: *)
385 rd_cpu_time : float; (* CPU time used in nanoseconds. *)
386 rd_percent_cpu : float; (* CPU time as percent of total. *)
387 (* The following are since the last slice, or None if cannot be calc'd: *)
388 rd_block_rd_reqs : int64 option; (* Number of block device read rqs. *)
389 rd_block_wr_reqs : int64 option; (* Number of block device write rqs. *)
390 rd_net_rx_bytes : int64 option; (* Number of bytes received. *)
391 rd_net_tx_bytes : int64 option; (* Number of bytes transmitted. *)
395 let collect, clear_pcpu_display_data =
396 (* We cache the list of block devices and interfaces for each domain
397 * here, so we don't need to reparse the XML each time.
399 let devices = Hashtbl.create 13 in
401 (* Function to get the list of block devices, network interfaces for
402 * a particular domain. Get it from the devices cache, and if not
403 * there then parse the domain XML.
405 let get_devices id dom =
406 try Hashtbl.find devices id
408 let blkdevs, netifs = (!parse_device_xml) id dom in
409 Hashtbl.replace devices id (blkdevs, netifs);
413 (* We save the state of domains across redraws here, which allows us
414 * to deduce %CPU usage from the running total.
416 let last_info = Hashtbl.create 13 in
417 let last_time = ref (Unix.gettimeofday ()) in
419 (* Save vcpuinfo structures across redraws too (only for pCPU display). *)
420 let last_vcpu_info = Hashtbl.create 13 in
422 let clear_pcpu_display_data () =
423 (* Clear out vcpu_info used by PCPUDisplay display_mode
424 * when we switch back to TaskDisplay mode.
426 Hashtbl.clear last_vcpu_info
429 let collect (conn, _, _, _, node_info, _, _) =
430 (* Number of physical CPUs (some may be disabled). *)
431 let nr_pcpus = C.maxcpus_of_node_info node_info in
433 (* Get the current time. *)
434 let time = Unix.gettimeofday () in
435 let tm = Unix.localtime time in
437 sprintf "%02d:%02d:%02d" tm.Unix.tm_hour tm.Unix.tm_min tm.Unix.tm_sec in
439 (* What's the total CPU time elapsed since we were last called? (ns) *)
440 let total_cpu_per_pcpu = 1_000_000_000. *. (time -. !last_time) in
441 (* Avoid division by zero. *)
442 let total_cpu_per_pcpu =
443 if total_cpu_per_pcpu <= 0. then 1. else total_cpu_per_pcpu in
444 let total_cpu = float node_info.C.cpus *. total_cpu_per_pcpu in
446 (* Get the domains. Match up with their last_info (if any). *)
448 (* Active domains. *)
449 let n = C.num_of_domains conn in
451 if n > 0 then Array.to_list (C.list_domains conn n)
457 let dom = D.lookup_by_id conn id in
458 let name = D.get_name dom in
459 let blkdevs, netifs = get_devices id dom in
461 (* Get current CPU, block and network stats. *)
462 let info = D.get_info dom in
464 try List.map (fun dev -> dev, D.block_stats dom dev) blkdevs
466 | Libvirt.Not_supported "virDomainBlockStats"
467 | Libvirt.Virterror _ -> [] in
468 let interface_stats =
469 try List.map (fun dev -> dev, D.interface_stats dom dev) netifs
471 | Libvirt.Not_supported "virDomainInterfaceStats"
472 | Libvirt.Virterror _ -> [] in
474 let prev_info, prev_block_stats, prev_interface_stats =
476 let prev_info, prev_block_stats, prev_interface_stats =
477 Hashtbl.find last_info id in
478 Some prev_info, prev_block_stats, prev_interface_stats
479 with Not_found -> None, [], [] in
482 rd_domid = id; rd_dom = dom; rd_info = info;
483 rd_block_stats = block_stats;
484 rd_interface_stats = interface_stats;
485 rd_prev_info = prev_info;
486 rd_prev_block_stats = prev_block_stats;
487 rd_prev_interface_stats = prev_interface_stats;
488 rd_cpu_time = 0.; rd_percent_cpu = 0.;
489 rd_block_rd_reqs = None; rd_block_wr_reqs = None;
490 rd_net_rx_bytes = None; rd_net_tx_bytes = None;
493 Libvirt.Virterror _ -> None (* ignore transient error *)
496 (* Inactive domains. *)
499 let n = C.num_of_defined_domains conn in
501 if n > 0 then Array.to_list (C.list_defined_domains conn n)
503 List.map (fun name -> name, Inactive) names
505 (* Ignore transient errors, in particular errors from
506 * num_of_defined_domains if it cannot contact xend.
508 | Libvirt.Virterror _ -> [] in
510 doms @ doms_inactive in
512 (* Calculate the CPU time (ns) and %CPU used by each domain. *)
516 (* We have previous CPU info from which to calculate it? *)
517 | name, Active ({ rd_prev_info = Some prev_info } as rd) ->
519 Int64.to_float (rd.rd_info.D.cpu_time -^ prev_info.D.cpu_time) in
520 let percent_cpu = 100. *. cpu_time /. total_cpu in
522 rd_cpu_time = cpu_time;
523 rd_percent_cpu = percent_cpu } in
525 (* For all other domains we can't calculate it, so leave as 0 *)
529 (* Calculate the number of block device read/write requests across
530 * all block devices attached to a domain.
535 (* Do we have stats from the previous slice? *)
536 | name, Active ({ rd_prev_block_stats = ((_::_) as prev_block_stats) }
538 let block_stats = rd.rd_block_stats in (* stats now *)
540 (* Add all the devices together. Throw away device names. *)
541 let prev_block_stats =
542 sum_block_stats (List.map snd prev_block_stats) in
544 sum_block_stats (List.map snd block_stats) in
546 (* Calculate increase in read & write requests. *)
548 block_stats.D.rd_req -^ prev_block_stats.D.rd_req in
550 block_stats.D.wr_req -^ prev_block_stats.D.wr_req in
553 rd_block_rd_reqs = Some read_reqs;
554 rd_block_wr_reqs = Some write_reqs } in
556 (* For all other domains we can't calculate it, so leave as None. *)
560 (* Calculate the same as above for network interfaces across
561 * all network interfaces attached to a domain.
566 (* Do we have stats from the previous slice? *)
567 | name, Active ({ rd_prev_interface_stats =
568 ((_::_) as prev_interface_stats) }
570 let interface_stats = rd.rd_interface_stats in (* stats now *)
572 (* Add all the devices together. Throw away device names. *)
573 let prev_interface_stats =
574 sum_interface_stats (List.map snd prev_interface_stats) in
575 let interface_stats =
576 sum_interface_stats (List.map snd interface_stats) in
578 (* Calculate increase in rx & tx bytes. *)
580 interface_stats.D.rx_bytes -^ prev_interface_stats.D.rx_bytes in
582 interface_stats.D.tx_bytes -^ prev_interface_stats.D.tx_bytes in
585 rd_net_rx_bytes = Some rx_bytes;
586 rd_net_tx_bytes = Some tx_bytes } in
588 (* For all other domains we can't calculate it, so leave as None. *)
592 (* Collect some extra information in PCPUDisplay display_mode. *)
594 if !display_mode = PCPUDisplay then (
595 (* Get the VCPU info and VCPU->PCPU mappings for active domains.
596 * Also cull some data we don't care about.
598 let doms = List.filter_map (
600 | (name, Active rd) ->
602 let domid = rd.rd_domid in
603 let maplen = C.cpumaplen nr_pcpus in
604 let maxinfo = rd.rd_info.D.nr_virt_cpu in
605 let nr_vcpus, vcpu_infos, cpumaps =
606 D.get_vcpus rd.rd_dom maxinfo maplen in
608 (* Got previous vcpu_infos for this domain? *)
609 let prev_vcpu_infos =
610 try Some (Hashtbl.find last_vcpu_info domid)
611 with Not_found -> None in
612 (* Update last_vcpu_info. *)
613 Hashtbl.replace last_vcpu_info domid vcpu_infos;
615 (match prev_vcpu_infos with
616 | Some prev_vcpu_infos
617 when Array.length prev_vcpu_infos = Array.length vcpu_infos ->
618 Some (domid, name, nr_vcpus, vcpu_infos, prev_vcpu_infos,
620 | _ -> None (* ignore missing / unequal length prev_vcpu_infos *)
623 Libvirt.Virterror _ -> None(* ignore transient libvirt errs *)
625 | (_, Inactive) -> None (* ignore inactive doms *)
627 let nr_doms = List.length doms in
629 (* Rearrange the data into a matrix. Major axis (down) is
630 * pCPUs. Minor axis (right) is domains. At each node we store:
631 * cpu_time (on this pCPU only, nanosecs),
632 * average? (if set, then cpu_time is an average because the
633 * vCPU is pinned to more than one pCPU)
634 * running? (if set, we were instantaneously running on this pCPU)
636 let empty_node = (0L, false, false) in
637 let pcpus = Array.make_matrix nr_pcpus nr_doms empty_node in
640 fun di (domid, name, nr_vcpus, vcpu_infos, prev_vcpu_infos,
642 (* Which pCPUs can this dom run on? *)
643 for v = 0 to nr_vcpus-1 do
644 let pcpu = vcpu_infos.(v).D.cpu in (* instantaneous pCPU *)
645 let nr_poss_pcpus = ref 0 in (* how many pcpus can it run on? *)
646 for p = 0 to nr_pcpus-1 do
647 (* vcpu v can reside on pcpu p *)
648 if C.cpu_usable cpumaps maplen v p then
651 let nr_poss_pcpus = Int64.of_int !nr_poss_pcpus in
652 for p = 0 to nr_pcpus-1 do
653 (* vcpu v can reside on pcpu p *)
654 if C.cpu_usable cpumaps maplen v p then
655 let vcpu_time_on_pcpu =
656 vcpu_infos.(v).D.vcpu_time
657 -^ prev_vcpu_infos.(v).D.vcpu_time in
658 let vcpu_time_on_pcpu =
659 vcpu_time_on_pcpu /^ nr_poss_pcpus in
661 (vcpu_time_on_pcpu, nr_poss_pcpus > 1L, p = pcpu)
666 (* Sum the CPU time used by each pCPU, for the %CPU column. *)
667 let pcpus_cpu_time = Array.map (
669 let cpu_time = ref 0L in
670 for di = 0 to Array.length row-1 do
671 let t, _, _ = row.(di) in
672 cpu_time := !cpu_time +^ t
674 Int64.to_float !cpu_time
677 Some (doms, pcpus, pcpus_cpu_time)
681 (* Calculate totals. *)
682 let totals = List.fold_left (
683 fun (count, running, blocked, paused, shutdown, shutoff,
684 crashed, active, inactive,
685 total_cpu_time, total_memory, total_domU_memory) ->
687 | (name, Active rd) ->
688 let test state orig =
689 if rd.rd_info.D.state = state then orig+1 else orig
691 let running = test D.InfoRunning running in
692 let blocked = test D.InfoBlocked blocked in
693 let paused = test D.InfoPaused paused in
694 let shutdown = test D.InfoShutdown shutdown in
695 let shutoff = test D.InfoShutoff shutoff in
696 let crashed = test D.InfoCrashed crashed in
698 let total_cpu_time = total_cpu_time +. rd.rd_cpu_time in
699 let total_memory = total_memory +^ rd.rd_info.D.memory in
700 let total_domU_memory = total_domU_memory +^
701 if rd.rd_domid > 0 then rd.rd_info.D.memory else 0L in
703 (count+1, running, blocked, paused, shutdown, shutoff,
704 crashed, active+1, inactive,
705 total_cpu_time, total_memory, total_domU_memory)
707 | (name, Inactive) -> (* inactive domain *)
708 (count+1, running, blocked, paused, shutdown, shutoff,
709 crashed, active, inactive+1,
710 total_cpu_time, total_memory, total_domU_memory)
711 ) (0,0,0,0,0,0,0,0,0, 0.,0L,0L) doms in
713 (* Update last_time, last_info. *)
715 Hashtbl.clear last_info;
719 let info = rd.rd_info, rd.rd_block_stats, rd.rd_interface_stats in
720 Hashtbl.add last_info rd.rd_domid info
725 time, printable_time,
726 nr_pcpus, total_cpu, total_cpu_per_pcpu,
731 collect, clear_pcpu_display_data
733 (* Redraw the display. *)
735 (* Keep a historical list of %CPU usages. *)
736 let historical_cpu = ref [] in
737 let historical_cpu_last_time = ref (Unix.gettimeofday ()) in
739 (_, _, _, _, node_info, _, _) (* setup *)
741 time, printable_time,
742 nr_pcpus, total_cpu, total_cpu_per_pcpu,
744 pcpu_display) (* state *) ->
747 (* Get the screen/window size. *)
748 let lines, cols = get_size () in
751 mvaddstr top_lineno 0 ("virt-top " ^ printable_time ^ " - ");
753 (* Basic node_info. *)
754 addstr (sprintf "%s %d/%dCPU %dMHz %LdMB "
755 node_info.C.model node_info.C.cpus nr_pcpus node_info.C.mhz
756 (node_info.C.memory /^ 1024L));
757 (* Save the cursor position for when we come to draw the
758 * historical CPU times (down in this function).
760 let stdscr = stdscr () in
761 let historical_cursor = getyx stdscr in
763 (match !display_mode with
764 | TaskDisplay -> (*---------- Showing domains ----------*)
765 (* Sort domains on current sort_order. *)
768 match !sort_order with
770 (fun _ -> 0) (* fallthrough to default name compare *)
773 | Active rd1, Active rd2 ->
774 compare rd2.rd_percent_cpu rd1.rd_percent_cpu
775 | Active _, Inactive -> -1
776 | Inactive, Active _ -> 1
777 | Inactive, Inactive -> 0)
780 | Active { rd_info = info1 }, Active { rd_info = info2 } ->
781 compare info2.D.memory info1.D.memory
782 | Active _, Inactive -> -1
783 | Inactive, Active _ -> 1
784 | Inactive, Inactive -> 0)
787 | Active { rd_info = info1 }, Active { rd_info = info2 } ->
788 compare info2.D.cpu_time info1.D.cpu_time
789 | Active _, Inactive -> -1
790 | Inactive, Active _ -> 1
791 | Inactive, Inactive -> 0)
794 | Active { rd_domid = id1 }, Active { rd_domid = id2 } ->
796 | Active _, Inactive -> -1
797 | Inactive, Active _ -> 1
798 | Inactive, Inactive -> 0)
801 | Active { rd_net_rx_bytes = r1 }, Active { rd_net_rx_bytes = r2 } ->
803 | Active _, Inactive -> -1
804 | Inactive, Active _ -> 1
805 | Inactive, Inactive -> 0)
808 | Active { rd_net_tx_bytes = r1 }, Active { rd_net_tx_bytes = r2 } ->
810 | Active _, Inactive -> -1
811 | Inactive, Active _ -> 1
812 | Inactive, Inactive -> 0)
815 | Active { rd_block_rd_reqs = r1 }, Active { rd_block_rd_reqs = r2 } ->
817 | Active _, Inactive -> -1
818 | Inactive, Active _ -> 1
819 | Inactive, Inactive -> 0)
822 | Active { rd_block_wr_reqs = r1 }, Active { rd_block_wr_reqs = r2 } ->
824 | Active _, Inactive -> -1
825 | Inactive, Active _ -> 1
826 | Inactive, Inactive -> 0)
828 let cmp (name1, dom1) (name2, dom2) =
829 let r = cmp (dom1, dom2) in
831 else compare name1 name2
833 List.sort ~cmp doms in
837 mvaddstr header_lineno 0
838 (pad cols " ID S RDRQ WRRQ RXBY TXBY %CPU %MEM TIME NAME");
841 let rec loop lineno = function
843 | (name, Active rd) :: doms ->
844 if lineno < lines then (
845 let state = show_state rd.rd_info.D.state in
846 let rd_req = Show.int64_option rd.rd_block_rd_reqs in
847 let wr_req = Show.int64_option rd.rd_block_wr_reqs in
848 let rx_bytes = Show.int64_option rd.rd_net_rx_bytes in
849 let tx_bytes = Show.int64_option rd.rd_net_tx_bytes in
850 let percent_cpu = Show.percent rd.rd_percent_cpu in
852 100L *^ rd.rd_info.D.memory /^ node_info.C.memory in
853 let percent_mem = Int64.to_float percent_mem in
854 let percent_mem = Show.percent percent_mem in
855 let time = Show.time rd.rd_info.D.cpu_time in
857 let line = sprintf "%5d %c %s %s %s %s %s %s %s %s"
858 rd.rd_domid state rd_req wr_req rx_bytes tx_bytes
859 percent_cpu percent_mem time name in
860 let line = pad cols line in
861 mvaddstr lineno 0 line;
864 | (name, Inactive) :: doms -> (* inactive domain *)
865 if lineno < lines then (
870 let line = pad cols line in
871 mvaddstr lineno 0 line;
875 loop domains_lineno doms
877 | PCPUDisplay -> (*---------- Showing physical CPUs ----------*)
878 let doms, pcpus, pcpus_cpu_time =
879 match pcpu_display with
881 | None -> failwith "internal error: no pcpu_display data" in
883 (* Display the pCPUs. *)
887 fun (_, name, _, _, _, _, _) ->
888 let len = String.length name in
889 let width = max (len+1) 7 in
894 mvaddstr header_lineno 0 (pad cols ("PHYCPU %CPU " ^ dom_names));
899 mvaddstr (p+domains_lineno) 0 (sprintf "%4d " p);
900 let cpu_time = pcpus_cpu_time.(p) in (* ns used on this CPU *)
901 let percent_cpu = 100. *. cpu_time /. total_cpu_per_pcpu in
902 addstr (Show.percent percent_cpu);
906 fun di (domid, name, _, _, _, _, _) ->
907 let t, is_average, is_running = pcpus.(p).(di) in
908 let len = String.length name in
909 let width = max (len+1) 7 in
913 let t = Int64.to_float t in
914 let percent = 100. *. t /. total_cpu_per_pcpu in
915 sprintf "%s%c%c " (Show.percent percent)
916 (if is_average then '=' else ' ')
917 (if is_running then '#' else ' ')
919 addstr (pad width str);
924 | NetDisplay -> (*---------- Showing network interfaces ----------*)
925 (* Only care about active domains. *)
926 let doms = List.filter_map (
928 | (name, Active rd) -> Some (name, rd)
929 | (_, Inactive) -> None
932 (* For each domain we have a list of network interfaces seen
933 * this slice, and seen in the previous slice, which we now
934 * match up to get a list of (domain, interface) for which
935 * we have current & previous knowledge. (And ignore the rest).
943 (* Have prev slice stats for this device? *)
945 List.assoc dev rd.rd_prev_interface_stats in
946 Some (dev, name, rd, stats, prev_stats)
947 with Not_found -> None
948 ) rd.rd_interface_stats
951 (* Finally we have a list of:
952 * device name, domain name, rd_* stuff, curr stats, prev stats.
954 let devs : (string * string * rd_active *
955 D.interface_stats * D.interface_stats) list =
958 (* Difference curr slice & prev slice. *)
959 let devs = List.map (
960 fun (dev, name, rd, curr, prev) ->
961 dev, name, rd, diff_interface_stats curr prev
964 (* Sort by current sort order, but map some of the standard
965 * sort orders into ones which makes sense here.
969 match !sort_order with
971 (fun _ -> 0) (* fallthrough to default name compare *)
973 (fun (_, { rd_domid = id1 }, _, { rd_domid = id2 }) ->
975 | Processor | Memory | Time | BlockRdRq | BlockWrRq
976 (* fallthrough to RXBY comparison. *)
978 (fun ({ D.rx_bytes = b1 }, _, { D.rx_bytes = b2 }, _) ->
981 (fun ({ D.tx_bytes = b1 }, _, { D.tx_bytes = b2 }, _) ->
984 let cmp (dev1, name1, rd1, stats1) (dev2, name2, rd2, stats2) =
985 let r = cmp (stats1, rd1, stats2, rd2) in
987 else compare (dev1, name1) (dev2, name2)
989 List.sort ~cmp devs in
991 (* Print the header for network devices. *)
993 mvaddstr header_lineno 0
994 (pad cols " ID S RXBY TXBY RXPK TXPK DOMAIN INTERFACE");
997 (* Print domains and devices. *)
998 let rec loop lineno = function
1000 | (dev, name, rd, stats) :: devs ->
1001 if lineno < lines then (
1002 let state = show_state rd.rd_info.D.state in
1004 if stats.D.rx_bytes >= 0L
1005 then Show.int64 stats.D.rx_bytes
1008 if stats.D.tx_bytes >= 0L
1009 then Show.int64 stats.D.tx_bytes
1012 if stats.D.rx_packets >= 0L
1013 then Show.int64 stats.D.rx_packets
1016 if stats.D.tx_packets >= 0L
1017 then Show.int64 stats.D.tx_packets
1020 let line = sprintf "%5d %c %s %s %s %s %-12s %s"
1023 rx_packets tx_packets
1024 (pad 12 name) dev in
1025 let line = pad cols line in
1026 mvaddstr lineno 0 line;
1027 loop (lineno+1) devs
1030 loop domains_lineno devs
1032 | BlockDisplay -> (*---------- Showing block devices ----------*)
1033 (* Only care about active domains. *)
1034 let doms = List.filter_map (
1036 | (name, Active rd) -> Some (name, rd)
1037 | (_, Inactive) -> None
1040 (* For each domain we have a list of block devices seen
1041 * this slice, and seen in the previous slice, which we now
1042 * match up to get a list of (domain, device) for which
1043 * we have current & previous knowledge. (And ignore the rest).
1051 (* Have prev slice stats for this device? *)
1053 List.assoc dev rd.rd_prev_block_stats in
1054 Some (dev, name, rd, stats, prev_stats)
1055 with Not_found -> None
1059 (* Finally we have a list of:
1060 * device name, domain name, rd_* stuff, curr stats, prev stats.
1062 let devs : (string * string * rd_active *
1063 D.block_stats * D.block_stats) list =
1064 List.flatten devs in
1066 (* Difference curr slice & prev slice. *)
1067 let devs = List.map (
1068 fun (dev, name, rd, curr, prev) ->
1069 dev, name, rd, diff_block_stats curr prev
1072 (* Sort by current sort order, but map some of the standard
1073 * sort orders into ones which makes sense here.
1077 match !sort_order with
1079 (fun _ -> 0) (* fallthrough to default name compare *)
1081 (fun (_, { rd_domid = id1 }, _, { rd_domid = id2 }) ->
1083 | Processor | Memory | Time | NetRX | NetTX
1084 (* fallthrough to RDRQ comparison. *)
1086 (fun ({ D.rd_req = b1 }, _, { D.rd_req = b2 }, _) ->
1089 (fun ({ D.wr_req = b1 }, _, { D.wr_req = b2 }, _) ->
1092 let cmp (dev1, name1, rd1, stats1) (dev2, name2, rd2, stats2) =
1093 let r = cmp (stats1, rd1, stats2, rd2) in
1095 else compare (dev1, name1) (dev2, name2)
1097 List.sort ~cmp devs in
1099 (* Print the header for block devices. *)
1101 mvaddstr header_lineno 0
1102 (pad cols " ID S RDBY WRBY RDRQ WRRQ DOMAIN DEVICE");
1105 (* Print domains and devices. *)
1106 let rec loop lineno = function
1108 | (dev, name, rd, stats) :: devs ->
1109 if lineno < lines then (
1110 let state = show_state rd.rd_info.D.state in
1112 if stats.D.rd_bytes >= 0L
1113 then Show.int64 stats.D.rd_bytes
1116 if stats.D.wr_bytes >= 0L
1117 then Show.int64 stats.D.wr_bytes
1120 if stats.D.rd_req >= 0L
1121 then Show.int64 stats.D.rd_req
1124 if stats.D.wr_req >= 0L
1125 then Show.int64 stats.D.wr_req
1128 let line = sprintf "%5d %c %s %s %s %s %-12s %s"
1132 (pad 12 name) dev in
1133 let line = pad cols line in
1134 mvaddstr lineno 0 line;
1135 loop (lineno+1) devs
1138 loop domains_lineno devs
1139 ); (* end of display_mode conditional section *)
1141 let (count, running, blocked, paused, shutdown, shutoff,
1142 crashed, active, inactive,
1143 total_cpu_time, total_memory, total_domU_memory) = totals in
1145 mvaddstr summary_lineno 0
1146 (sprintf (f_ "%d domains, %d active, %d running, %d sleeping, %d paused, %d inactive D:%d O:%d X:%d")
1147 count active running blocked paused inactive shutdown shutoff
1150 (* Total %CPU used, and memory summary. *)
1151 let percent_cpu = 100. *. total_cpu_time /. total_cpu in
1152 mvaddstr (summary_lineno+1) 0
1153 (sprintf (f_ "CPU: %2.1f%% Mem: %Ld MB (%Ld MB by guests)")
1154 percent_cpu (total_memory /^ 1024L) (total_domU_memory /^ 1024L));
1156 (* Time to grab another historical %CPU for the list? *)
1157 if time >= !historical_cpu_last_time +. float !historical_cpu_delay
1159 historical_cpu := percent_cpu :: List.take 10 !historical_cpu;
1160 historical_cpu_last_time := time
1163 (* Display historical CPU time. *)
1165 let x, y = historical_cursor in (* Yes, it's a bug in ocaml-curses *)
1166 let maxwidth = cols - x in
1169 (List.map (sprintf "%2.1f%%") !historical_cpu) in
1170 let line = pad maxwidth line in
1174 move message_lineno 0; (* Park cursor in message area, as with top. *)
1175 refresh (); (* Refresh the display. *)
1178 (* Write CSV header row. *)
1179 let write_csv_header () =
1181 [ "Hostname"; "Time"; "Arch"; "Physical CPUs";
1182 "Count"; "Running"; "Blocked"; "Paused"; "Shutdown";
1183 "Shutoff"; "Crashed"; "Active"; "Inactive";
1184 "%CPU"; "Total memory (KB)"; "Total guest memory (KB)";
1185 "Total CPU time (ns)" ] @
1186 (* These fields are repeated for each domain: *)
1187 [ "Domain ID"; "Domain name"; ] @
1188 (if !csv_cpu then [ "CPU (ns)"; "%CPU"; ] else []) @
1189 (if !csv_block then [ "Block RDRQ"; "Block WRRQ"; ] else []) @
1190 (if !csv_net then [ "Net RXBY"; "Net TXBY" ] else [])
1193 (* Write summary data to CSV file. *)
1195 (_, _, _, _, node_info, hostname, _) (* setup *)
1198 nr_pcpus, total_cpu, _,
1202 (* The totals / summary fields. *)
1203 let (count, running, blocked, paused, shutdown, shutoff,
1204 crashed, active, inactive,
1205 total_cpu_time, total_memory, total_domU_memory) = totals in
1207 let percent_cpu = 100. *. total_cpu_time /. total_cpu in
1209 let summary_fields = [
1210 hostname; printable_time; node_info.C.model; string_of_int nr_pcpus;
1211 string_of_int count; string_of_int running; string_of_int blocked;
1212 string_of_int paused; string_of_int shutdown; string_of_int shutoff;
1213 string_of_int crashed; string_of_int active; string_of_int inactive;
1214 sprintf "%2.1f" percent_cpu;
1215 Int64.to_string total_memory; Int64.to_string total_domU_memory;
1216 Int64.to_string (Int64.of_float total_cpu_time)
1221 * Sort them by ID so that the list of relatively stable. Ignore
1224 let doms = List.filter_map (
1226 | _, Inactive -> None (* Ignore inactive domains. *)
1227 | name, Active rd -> Some (name, rd)
1229 let cmp (_, { rd_domid = rd_domid1 }) (_, { rd_domid = rd_domid2 }) =
1230 compare rd_domid1 rd_domid2
1232 let doms = List.sort ~cmp doms in
1234 let string_of_int64_option = Option.map_default Int64.to_string "" in
1236 let domain_fields = List.map (
1237 fun (domname, rd) ->
1238 [ string_of_int rd.rd_domid; domname ] @
1240 string_of_float rd.rd_cpu_time; string_of_float rd.rd_percent_cpu
1242 (if !csv_block then [
1243 string_of_int64_option rd.rd_block_rd_reqs;
1244 string_of_int64_option rd.rd_block_wr_reqs;
1247 string_of_int64_option rd.rd_net_rx_bytes;
1248 string_of_int64_option rd.rd_net_tx_bytes;
1251 let domain_fields = List.flatten domain_fields in
1253 (!csv_write) (summary_fields @ domain_fields)
1256 let rec main_loop ((_, batch_mode, script_mode, csv_enabled, _, _, _)
1258 if csv_enabled then write_csv_header ();
1261 let state = collect setup in (* Collect stats. *)
1262 if not script_mode then redraw setup state; (* Redraw display. *)
1263 if csv_enabled then append_csv setup state; (* Update CSV file. *)
1265 (* Clear up unused virDomainPtr objects. *)
1268 (* Get next key. This does the sleep. *)
1269 if not batch_mode && not script_mode then
1270 get_key_press setup;
1272 (* Max iterations? *)
1273 if !iterations >= 0 then (
1275 if !iterations = 0 then quit := true
1279 (match !end_time with
1282 let (_, time, _, _, _, _, _, _) = state in
1283 let delay_secs = float !delay /. 1000. in
1284 if end_time <= time +. delay_secs then quit := true
1287 (* Batch mode or script mode. We didn't call get_key_press above, so
1288 * we didn't sleep. Sleep now, unless we are about to quit.
1290 if batch_mode || script_mode then
1295 and get_key_press setup =
1296 (* Read the next key, waiting up to !delay milliseconds. *)
1299 timeout (-1); (* Reset to blocking mode. *)
1301 if k >= 0 && k <> 32 (* ' ' *) && k <> 12 (* ^L *) && k <> Key.resize
1303 if k = Char.code 'q' then quit := true
1304 else if k = Char.code 'h' then show_help setup
1305 else if k = Char.code 's' || k = Char.code 'd' then change_delay ()
1306 else if k = Char.code 'M' then sort_order := Memory
1307 else if k = Char.code 'P' then sort_order := Processor
1308 else if k = Char.code 'T' then sort_order := Time
1309 else if k = Char.code 'N' then sort_order := DomainID
1310 else if k = Char.code 'F' then change_sort_order ()
1311 else if k = Char.code '0' then set_tasks_display ()
1312 else if k = Char.code '1' then toggle_pcpu_display ()
1313 else if k = Char.code '2' then toggle_net_display ()
1314 else if k = Char.code '3' then toggle_block_display ()
1315 else if k = Char.code 'W' then write_init_file ()
1316 else unknown_command k
1319 and change_delay () =
1321 (sprintf (f_ "Change delay from %.1f to: ") (float !delay /. 1000.));
1322 let str = get_string 16 in
1323 (* Try to parse the number. *)
1326 let newdelay = float_of_string str in
1327 if newdelay <= 0. then (
1328 print_msg (s_ "Delay must be > 0"); true
1330 delay := int_of_float (newdelay *. 1000.); false
1333 Failure "float_of_string" ->
1334 print_msg (s_ "Not a valid number"); true in
1336 sleep (if error then 2 else 1)
1338 and change_sort_order () =
1340 let lines, cols = get_size () in
1342 mvaddstr top_lineno 0 (s_ "Set sort order for main display");
1343 mvaddstr summary_lineno 0 (s_ "Type key or use up and down cursor keys.");
1346 mvaddstr header_lineno 0 (pad cols "KEY Sort field");
1349 let accelerator_key = function
1350 | Memory -> "(key: M)"
1351 | Processor -> "(key: P)"
1352 | Time -> "(key: T)"
1353 | DomainID -> "(key: N)"
1354 | _ -> (* all others have to be changed from here *) ""
1357 let rec key_of_int = function
1358 | i when i < 10 -> Char.chr (i + Char.code '0')
1359 | i when i < 20 -> Char.chr (i + Char.code 'a')
1361 and int_of_key = function
1362 | k when k >= 0x30 && k <= 0x39 (* '0' - '9' *) -> k - 0x30
1363 | k when k >= 0x61 && k <= 0x7a (* 'a' - 'j' *) -> k - 0x61 + 10
1364 | k when k >= 0x41 && k <= 0x6a (* 'A' - 'J' *) -> k - 0x41 + 10
1368 (* Display possible sort fields. *)
1369 let selected_index = ref 0 in
1372 let selected = !sort_order = ord in
1373 if selected then selected_index := i;
1374 mvaddstr (domains_lineno+i) 0
1375 (sprintf " %c %s %s %s"
1376 (key_of_int i) (if selected then "*" else " ")
1377 (printable_sort_order ord)
1378 (accelerator_key ord))
1381 move message_lineno 0;
1384 if k >= 0 && k <> 32 && k <> Char.code 'q' && k <> 13 then (
1385 let new_order, loop =
1386 (* Redraw the display. *)
1387 if k = 12 (* ^L *) then None, true
1388 (* Make the UP and DOWN arrow keys do something useful. *)
1389 else if k = Key.up then (
1390 if !selected_index > 0 then
1391 Some (List.nth all_sort_fields (!selected_index-1)), true
1395 else if k = Key.down then (
1396 if !selected_index < List.length all_sort_fields - 1 then
1397 Some (List.nth all_sort_fields (!selected_index+1)), true
1401 (* Also understand the regular accelerator keys. *)
1402 else if k = Char.code 'M' then
1404 else if k = Char.code 'P' then
1405 Some Processor, false
1406 else if k = Char.code 'T' then
1408 else if k = Char.code 'N' then
1409 Some DomainID, false
1411 (* It's one of the KEYs. *)
1412 let i = int_of_key k in
1413 if i >= 0 && i < List.length all_sort_fields then
1414 Some (List.nth all_sort_fields i), false
1419 (match new_order with
1422 sort_order := new_order;
1423 print_msg (sprintf "Sort order changed to: %s"
1424 (printable_sort_order new_order));
1431 if loop then change_sort_order ()
1434 (* Note: We need to clear_pcpu_display_data every time
1435 * we _leave_ PCPUDisplay mode.
1437 and set_tasks_display () = (* key 0 *)
1438 if !display_mode = PCPUDisplay then clear_pcpu_display_data ();
1439 display_mode := TaskDisplay
1441 and toggle_pcpu_display () = (* key 1 *)
1443 match !display_mode with
1444 | TaskDisplay | NetDisplay | BlockDisplay -> PCPUDisplay
1445 | PCPUDisplay -> clear_pcpu_display_data (); TaskDisplay
1447 and toggle_net_display () = (* key 2 *)
1449 match !display_mode with
1450 | PCPUDisplay -> clear_pcpu_display_data (); NetDisplay
1451 | TaskDisplay | BlockDisplay -> NetDisplay
1452 | NetDisplay -> TaskDisplay
1454 and toggle_block_display () = (* key 3 *)
1456 match !display_mode with
1457 | PCPUDisplay -> clear_pcpu_display_data (); BlockDisplay
1458 | TaskDisplay | NetDisplay -> BlockDisplay
1459 | BlockDisplay -> TaskDisplay
1461 (* Write an init file. *)
1462 and write_init_file () =
1463 match !init_file with
1464 | NoInitFile -> () (* Do nothing if --no-init-file *)
1465 | DefaultInitFile ->
1466 let home = try Sys.getenv "HOME" with Not_found -> "/" in
1467 let filename = home // rcfile in
1468 _write_init_file filename
1469 | InitFile filename ->
1470 _write_init_file filename
1472 and _write_init_file filename =
1474 (* Create the new file as filename.new. *)
1475 let chan = open_out (filename ^ ".new") in
1477 let time = Unix.gettimeofday () in
1478 let tm = Unix.localtime time in
1479 let printable_date_time =
1480 sprintf "%04d-%02d-%02d %02d:%02d:%02d"
1481 (tm.Unix.tm_year + 1900) (tm.Unix.tm_mon+1) tm.Unix.tm_mday
1482 tm.Unix.tm_hour tm.Unix.tm_min tm.Unix.tm_sec in
1485 let uid = Unix.geteuid () in
1486 (Unix.getpwuid uid).Unix.pw_name
1488 Not_found -> "unknown" in
1491 let nl () = fp chan "\n" in
1492 let () = fp chan (f_ "# %s virt-top configuration file\n") rcfile in
1493 let () = fp chan (f_ "# generated on %s by %s\n") printable_date_time username in
1495 fp chan "display %s\n" (cli_of_display !display_mode);
1496 fp chan "delay %g\n" (float !delay /. 1000.);
1497 fp chan "hist-cpu %d\n" !historical_cpu_delay;
1498 if !iterations <> -1 then fp chan "iterations %d\n" !iterations;
1499 fp chan "sort %s\n" (cli_of_sort_order !sort_order);
1502 | Some uri -> fp chan "connect %s\n" uri
1504 if !batch_mode = true then fp chan "batch true\n";
1505 if !secure_mode = true then fp chan "secure true\n";
1507 output_string chan (s_ "# To send debug and error messages to a file, uncomment next line\n");
1508 fp chan "#debug virt-top.out\n";
1510 output_string chan (s_ "# Enable CSV output to the named file\n");
1511 fp chan "#csv virt-top.csv\n";
1513 output_string chan (s_ "# To protect this file from being overwritten, uncomment next line\n");
1514 fp chan "#overwrite-init-file false\n";
1518 (* If the file exists, rename it as filename.old. *)
1519 (try Unix.rename filename (filename ^ ".old")
1520 with Unix.Unix_error _ -> ());
1522 (* Rename filename.new to filename. *)
1523 Unix.rename (filename ^ ".new") filename;
1525 print_msg (sprintf (f_ "Wrote settings to %s") filename);
1530 print_msg (s_ "Error" ^ ": " ^ err); refresh (); sleep 2
1531 | Unix.Unix_error (err, fn, str) ->
1532 print_msg (s_ ("Error" ^ ": " ^ Unix.error_message err ^ fn ^ str));
1536 and show_help (_, _, _, _, _, hostname,
1537 (libvirt_major, libvirt_minor, libvirt_release)) =
1540 (* Get the screen/window size. *)
1541 let lines, cols = get_size () in
1543 (* Banner at the top of the screen. *)
1545 sprintf (f_ "virt-top %s (libvirt %d.%d.%d) by Red Hat")
1546 Libvirt_version.version libvirt_major libvirt_minor libvirt_release in
1547 let banner = pad cols banner in
1549 mvaddstr 0 0 banner;
1554 (sprintf (f_ "Delay: %.1f secs; Batch: %s; Secure: %s; Sort: %s")
1555 (float !delay /. 1000.)
1556 (if !batch_mode then "On" else "Off")
1557 (if !secure_mode then "On" else "Off")
1558 (printable_sort_order !sort_order));
1560 (sprintf (f_ "Connect: %s; Hostname: %s")
1561 (match !uri with None -> "default" | Some s -> s)
1564 (* Misc keys on left. *)
1565 let banner = pad 38 (s_ "MAIN KEYS") in
1567 mvaddstr header_lineno 1 banner;
1571 let lineno = ref domains_lineno in
1572 fun () -> let i = !lineno in incr lineno; i
1574 let key keys description =
1575 let lineno = get_lineno () in
1576 move lineno 1; attron A.bold; addstr keys; attroff A.bold;
1577 move lineno 10; addstr description; ()
1579 key "space ^L" (s_ "Update display");
1580 key "q" (s_ "Quit");
1581 key "d s" (s_ "Set update interval");
1582 key "h" (s_ "Help");
1585 ignore (get_lineno ());
1586 let banner = pad 38 (s_ "SORTING") in
1588 mvaddstr (get_lineno ()) 1 banner;
1591 key "P" (s_ "Sort by %CPU");
1592 key "M" (s_ "Sort by %MEM");
1593 key "T" (s_ "Sort by TIME");
1594 key "N" (s_ "Sort by ID");
1595 key "F" (s_ "Select sort field");
1597 (* Display modes on right. *)
1598 let banner = pad 39 (s_ "DISPLAY MODES") in
1600 mvaddstr header_lineno 40 banner;
1604 let lineno = ref domains_lineno in
1605 fun () -> let i = !lineno in incr lineno; i
1607 let key keys description =
1608 let lineno = get_lineno () in
1609 move lineno 40; attron A.bold; addstr keys; attroff A.bold;
1610 move lineno 49; addstr description; ()
1612 key "0" (s_ "Domains display");
1613 key "1" (s_ "Toggle physical CPUs");
1614 key "2" (s_ "Toggle network interfaces");
1615 key "3" (s_ "Toggle block devices");
1617 (* Update screen and wait for key press. *)
1618 mvaddstr (lines-1) 0
1619 (s_ "More help in virt-top(1) man page. Press any key to return.");
1623 and unknown_command k =
1624 print_msg (s_ "Unknown command - try 'h' for help");