1gkrellm(1) User's Manual gkrellm(1)
2
6 gkrellm - The GNU Krell Monitors
7
10 gkrellm [ --help ] [ -t | --theme dir ] [ -g | --geometry +x+y ] [ -wm
11 ] [ -w | --withdrawn ] [ -c | --config suffix ] [ -nc ] [ -f |
12 --force-host-config ] [ -demo ] [ -p | --plugin plugin.so ] [ -s |
13 --server hostname ] [ -P | --port server_port ] [ -l | --logfile path ]
14
17 With a single process, gkrellm manages multiple stacked monitors and
18 supports applying themes to match the monitors appearance to your win‐
19 dow manager, Gtk, or any other theme.
20 FEATURES
23 · SMP CPU, Disk, Proc, and active net interface monitors with LEDs.
24 · Internet monitor that displays current and charts historical port
26 hits.
27 · Memory and swap space usage meters and a system uptime monitor.
29 · File system meters show capacity/free space and can mount/umount.
31 · A mbox/maildir/MH/POP3/IMAP mail monitor which can launch a mail
33 reader or remote mail fetch program.
34 · Clock/calendar and hostname display.
36 · Laptop Battery monitor.
38 · CPU/motherboard temperature/fan/voltages display with warnings and
40 alarms. Linux requires a sensor configured sysfs, lm_sensors mod‐
41 ules or a running mbmon daemon. FreeBSD can also read the mbmon
42 daemon. Windows requires MBM.
43 · Disk temperatures if there's a running hddtemp daemon.
45 · Multiple monitors managed by a single process to reduce system
47 load.
48 · A timer button that can execute PPP or ISDN logon/logoff scripts.
50 · Charts are autoscaling with configurable grid line resolution, or
52 · can be set to a fixed scale mode.
54 · Separate colors for "in" and "out" data. The in color is used for
56 CPU user time, disk read, forks, and net receive data. The out
57 color is used for CPU sys time, disk write, load, and net transmit
58 data.
59 · Commands can be configured to run when monitor labels are clicked.
61 · Data can be collected from a gkrellmd server running on a remote
63 machine.
64 · gkrellm is plugin capable so special interest monitors can be cre‐
66 ated.
67 · Many themes are available.
69 USER INTERFACE
72 · Top frame
73 Btn 1 Press and drag to move gkrellm window.
75 Btn 3 Popup main menu.
77 · Side frames
79 Btn 2 Slide gkrellm window shut (Btn1 if -m2 option).
81 Btn 3 Popup main menu.
83 · All charts
85 Btn 1 Toggle draw of extra info on the chart.
87 Btn 3 Brings up a chart configuration window.
89 · Inet charts
91 Btn 2 Toggle between port hits per minute and hour.
93 · Most panels
95 Btn 3 Opens the configuration window directly to a monitor's
97 configuration page.
98 · File System meter panels
100 Btn 1,2
102 Toggle display of label and fs capacity scrolling dis‐
103 play. The mount button runs mount/umount commands. If
104 ejectable, left click the eject button to open tray,
105 right click to close.
106 · Mem and Swap meter panels
108 Btn 1,2
110 Toggle display of label and memory or swap capacity
111 scrolling display.
112 · Mailbox monitor message count button
114 Btn 1 Launch a mail reader program. If options permit, also
116 stop animations and reset remote message counts.
117 Btn 2 Toggle mail check mute mode which inhibits the sound
119 notify program, and optionally inhibits all mail check‐
120 ing.
121 · Mailbox monitor envelope decal
123 Btn 1 Force a mail check regardless of mute or timeout state.
125 · Battery monitor panel
127 Btn 1 On the charging state decal toggles battery minutes left,
129 percent level, and charge rate display.
130 Btn 2 Anywhere on the panel also toggles the display.
132 · Keyboard shortcuts
134 F1 popup the user config window.
136 F2 popup the main menu.
138 Page_Up
140 previous theme or theme alternative.
141 Page_Down
143 next theme or theme alternative.
144 <Ctl>Page_Up
146 previous theme, skipping any theme alternatives.
147 <Ctl>Page_Down
149 next theme, skipping any theme alternatives.
150 If a command has been configured to be launched for a monitor, then a
152 button will appear when the mouse enters the panel of that monitor.
153 Clicking the button will launch the command.
154 A right button mouse click on the side or top frames of the gkrellm
156 window will pop up a user configuration window where you can configure
157 all the builtin and plugin monitors. Chart appearance may be config‐
158 ured by right clicking on a chart, and right clicking on many panels
159 will open the configuration window directly to the corresponding moni‐
160 tor's configuration page.
161
164 --help Displays this manual page.
165 -t, --theme dir
167 gkrellm will load all theme image files it finds in dir and
168 parse the gkrellmrc file if one exists. This option overrides
169 the loading of the last theme you configured to be loaded in the
170 Themes configuration window. Theme changes are not saved when
171 gkrellm is run with this option.
172 -g, --geometry +x+y
174 Makes gkrellm move to an (x,y) position on the screen at
175 startup. Standard X window geometry position (not size) formats
176 are parsed, ie +x+y -x+y +x-y -x-y. Except, negative geometry
177 positions are not recognized (ie +-x--y ).
178 -wm Forces gkrellm to start up with window manager decorations. The
180 default is no decorations because there are themed borders.
181 -w, --withdrawn
183 gkrellm starts up in withdrawn mode so it can go into the Black‐
184 box slit (and maybe WindowMaker dock).
185 -c, --config suffix
187 Use alternate config files generated by appending suffix to con‐
188 fig file names. This overrides any previous host config which
189 may have been setup with the below option.
190 -f, --force-host-config
192 If gkrellm is run once with this option and then the configura‐
193 tion or theme is changed, the config files that are written will
194 have a -hostname appended to them. Subsequent runs will detect
195 the user-config-hostname and gkrellm_theme.cfg-hostname files
196 and use them instead of the normal configuration files (unless
197 the --config option is specified). This is a convenience for
198 allowing remote gkrellm independent config files in a shared
199 home directory, and for the hostname to show up in the X title
200 for window management. This option has no effect in client
201 mode.
202 -s, --server hostname
204 Run in client mode by connecting to and collecting data from a
205 gkrellmd server on hostname
206 -P, --port server_port
208 Use server_port for the gkrellmd server connection.
209 -l, --logfile path
211 Enable sending error and debugging messages to a log file.
212 -nc No config mode. The config menu is blocked so no config changes
214 can be made. Useful in certain environments, or maybe for run‐
215 ning on a xdm(1) login screen or during a screensaver mode?
216 -demo Force enabling of many monitors so themers can see everything.
218 All config saving is inhibited.
219 -p, --plugin plugin.so
221 For plugin development, load the command line specified plugin
222 so you can avoid repeated install steps in the development
223 cycle.
224
227 Charts
228 The default for most charts is to automatically adjust the number of
229 grid lines drawn and the resolution per grid so drawn data will be
230 nicely visible. You may change this to fixed grids of 1-5 and/or fixed
231 grid resolutions in the chart configuration windows. However, some
232 combination of the auto scaling modes may give best results.
233 Auto grid resolution has the following behavior.
235 Auto mode sticks at peak value is not set:
237 1) If using auto number of grids, set the resolution per grid
239 and the number of grids to optimize the visibility of data drawn
240 on the chart. Try to keep the number of grids between 1 and 7.
241 2) If using a fixed number of grids, set the resolution per grid
243 to the smallest value that draws data without clipping.
244 Auto mode sticks at peak value is set:
246 1) If using auto number of grids, set the resolution per grid
248 such that drawing the peak value encountered would require at
249 least 5 grids.
250 2) If using a fixed number of grids, set the resolution per grid
252 such that the peak value encountered could be drawn without
253 clipping. This means the resolution per grid never decreases.
254 All resolution per grid values are constrained to a set of values in
256 either a 1, 2, 5 sequence or a 1, 1.5, 2, 3, 5, 7 sequence. If you set
257 Auto mode sticks at peak value a manual Auto mode recalibrate may occa‐
258 sionally be required if the chart data has a wide dynamic range.
259 CPU Monitor
263 Data is plotted as a percentage. In auto number of grids mode, resolu‐
264 tion is a fixed 20% per grid. In fixed number of grids mode, grid res‐
265 olution is 100% divided by the number of grids.
266 Proc Monitor
269 The krell shows process forks with a full scale value of 10 forks. The
270 chart has a resolution of 10 forks/sec per grid in auto number of grids
271 mode and 50 forks/second maximum on the chart in fixed number of grids
272 mode. The process load resolution per grid is best left at 1.0 for
273 auto number of grids, but can be set as high as 5 if you configure the
274 chart to have only 1 or 2 fixed grids.
275 Net Monitor
278 gkrellm is designed to display a chart for net interfaces which are up,
279 which means they are listed in the routing table (however, it is possi‐
280 ble in some cases to monitor unrouted interfaces). One net interface
281 may be linked to a timer button which can be used to connect and dis‐
282 connect from an ISP.
283 The timer button shows an off, standby, or on state by a distinctive
285 (color or shape) icon.
286 ppp Standby state is while the modem phone line is locked while ppp
288 is connecting, and the on state is the ppp link connected. The
289 phone line lock is determined by the existence of the modem lock
290 file /var/lock/LCK..modem, which assumes pppd is using
291 /dev/modem. However, if your pppd setup does not use
292 /dev/modem, then you can configure an alternative with:
293 ln -s /var/lock/LCK..ttySx ~/.gkrellm2/LCK..modem
295 where ttySx is the tty device your modem does use. The ppp on
297 state is detected by the existence of /var/run/pppX.pid and the
298 time stamp of this file is the base for the on line time.
299 ippp The timer button standby state is not applicable to ISDN inter‐
301 faces that are always routed. The on state is ISDN on line while
302 the ippp interface is routed. The on line timer is reset at
303 transitions from ISDN hangup state to on line state.
304 For both ppp and ippp timer button links, the panel area of the inter‐
306 face is always shown and the chart appears when the interface is routed
307 with the phone link connected or on line.
308 If the timer button is not linked to a net interface, then it can be
310 used as a push on / push off timer
311 Net monitors can have a label so that the interface can be associated
313 with the identity of the other end of the connection. This is useful
314 if you have several net connections or run multiple remote gkrellm pro‐
315 grams. It can be easier to keep track of who is connected to who.
316 Mem and Swap Monitor
319 Here you are reading a ratio of total used to total available. The
320 amount of memory used indicated by the memory monitor is actually a
321 calculated "used" memory. If you enter the "free" command, you will
322 see that most of your memory is almost always used because the kernel
323 uses large amounts for buffers and cache. Since the kernel can free a
324 lot of this memory as user process demand for memory goes up, a more
325 realistic reading of memory in use is obtained by subtracting the buf‐
326 fers and cached memory from the kernel reported used. This is shown in
327 the free command output in the "-/+ buffers/cache" line where a calcu‐
328 lated used amount has buffers and cached memory subtracted from the
329 kernel reported used memory, and a calculated free amount has the buf‐
330 fers and cached memory added in.
331 While the memory meter always shows the calculated "used" memory, the
333 raw memory values total, shared, buffered, and cached may be optionally
334 displayed in the memory panel by entering an appropriate format display
335 string in the config.
336 Units: All memory values have units of binary megabytes (MiB). Memory
338 sizes have historically been reported in these units because memory
339 arrays on silicon have always increased in size by multiples of 2. Add
340 an address line to a memory chip and you double or quadruple (a multi‐
341 plexed address) the memory size. A binary megabyte is 2^20 or 1048576.
342 Contrast this with units for other stats such as disk capacities or net
343 transfer rates where the proper units are decimal megabytes or kilo‐
344 bytes. Disk drive capacities do not increase by powers of 2 and manu‐
345 facturers do not use binary units when reporting their sizes. However,
346 some of you may prefer to see a binary disk drive capacity reported, so
347 it is available as an option.
348 Internet Monitor
351 Displays TCP port connections and records historical port hits on a
352 minute or hourly chart. Middle button click on an inet chart to toggle
353 between the minute and hourly displays. There is a strip below the
354 minute or hour charts where marks are drawn for port hits in second
355 intervals. Each inet krell also shows port hits with a full scale
356 range of 5 hits. The left button toggle of extra info displays current
357 port connections.
358 For each internet monitor you can specify two labeled datasets with one
360 or two ports for each dataset. There are two ports because some inter‐
361 net ports are related and you might want to group them - for example,
362 the standard HTTP port is 80, but there is also a www web caching ser‐
363 vice on port 8080. So it makes sense to have a HTTP monitor which com‐
364 bines data from both ports. A possible common configuration would be
365 to create one inet monitor that monitors HTTP hits plotted in one color
366 and FTP hits in another. To do this, setup in the Internet configura‐
367 tion tab:
368 HTTP 80 8080 FTP 21
370 Or you could create separate monitors for HTTP and FTP. Other monitors
372 might be SMTP on port 25 or NNTP on port 119.
373 If you check the "Port0 - Port1 is a range" button, then all of the
375 ports between the two entries will be monitored. Clicking the small
376 button on the Inet panels will pop up a window listing the currently
377 connected port numbers and the host that is connected to it.
378 gkrellm samples TCP port activity once per second, so it is possible
380 for port hits lasting less than a second to be missed.
381 File System Monitor
384 File system mount points can be selected to be monitored with a meter
385 that shows the ratio of blocks used to total blocks available. Mount‐
386 ing commands can be enabled for mount points in one of two ways:
387 If a mount point is in your /etc/fstab and you have mount permission
389 then mount(8) and umount(8) commands can be enabled and executed for
390 that mount point simply by checking the "Enable /etc/fstab mounting"
391 option. Mount table entries in /etc/fstab must have the "user" or
392 "owner" option set to grant this permission unless gkrellm is run as
393 root. For example, if you run gkrellm as a normal user and you want to
394 be able to mount your floppy, your /etc/fstab could have either of:
395 /dev/fd0 /mnt/floppy ext2 user,noauto,rw,exec 0 0
397 /dev/fd0 /mnt/floppy ext2 user,defaults 0 0
398 If gkrellm is run as root or if you have sudo(1) permission to run the
400 mount(8) commands, then a custom mount command can be entered into the
401 "mount command" entry box. A umount(8) command must also be entered if
402 you choose this method. Example mount and umount entries using sudo:
403 sudo /bin/mount -t msdos /dev/fd0 /mnt/A
405 sudo /bin/umount /mnt/A
406 Notes: the mount point specified in a custom mount command (/mnt/A in
408 this example) must be the same as entered in the "Mount Point" entry.
409 Also, you should have the NOPASSWD option set in /etc/sudoers for this.
410 File system monitors can be created as primary (always visible) or sec‐
412 ondary which can be hidden and then shown when they are of interest.
413 For example, you might make primary file system monitors for root,
414 home, or user so they will be always visible, but make secondary moni‐
415 tors for less frequently used mount points such as floppy, zip, backup
416 partitions, foreign file system types, etc. Secondary FS monitors can
417 also be configured to always be visible if they are mounted by checking
418 the "Show if mounted" option. Using this feature you can show the
419 secondary group, mount a file system, and have that FS monitor remain
420 visible even when the secondary group is hidden. A standard cdrom
421 mount will show as 100% full but a monitor for it could be created with
422 mounting enabled just to have the mount/umount convenience.
423 When the "Ejectable" option is selected for a file system, an eject
425 button will appear when the mouse enters the file system panel. If you
426 are not using /etc/fstab mounting, a device file to eject will also
427 need to be entered. Systems may have varying levels of support for
428 this feature ranging from none or basic using an ioctl() to full sup‐
429 port using an eject command to eject all its supported devices. Linux
430 and NetBSD use the "eject" command while FreeBSD uses the "cdcontrol"
431 command, so be sure these commands are installed. Most eject commands
432 will also support closing a CDROM tray. If they do, you will be able
433 to access this function by right clicking the eject button.
434 Mail Monitor
437 Checks your mailboxes for unread mail. A mail reading program (MUA) can
438 be executed with a left mouse click on the mail monitor panel button,
439 and a mail notify (play a sound) program such as esdplay or artsplay
440 can be executed whenever the new mail count increases. The mail panel
441 envelope decal may also be clicked to force an immediate mail check at
442 any time.
443 gkrellm is capable of checking mail from local mailbox types mbox, MH,
445 and maildir, and from remote mailbox types POP3 and IMAP.
446 POP3 and IMAP checking can use non-standard port numbers and password
448 authentication protocols APOP (for POP3 only) or CRAM-MD5. If sup‐
449 ported by the mail server, emote checking may be done over an SSL con‐
450 nection if the "Use SSL" option is selected.
451 Before internal POP3 and IMAP checking was added, an external mail
453 fetch/check program could be set up to be executed periodically to
454 download or check remote POP3 or IMAP mail. This method is still
455 available and must be used if you want gkrellm to be able to download
456 remote mail to local mailboxes because the builtin checking functions
457 cannot download.
458 Battery Monitor
461 This meter will be available if a battery exists and will show battery
462 percentage life remaining. A decal indicates if AC line is connected
463 or if the battery is in use. If the data is available, time remaining
464 may be displayed as well as the percentage battery level. If the time
465 remaining is not available or is inaccurate, the Estimate Time option
466 may be selected to display a battery time to run or time to charge
467 which is calculated based on the current battery percent level, user
468 supplied typical battery times, and a default linear extrapolation
469 model. For charging, an exponential charge model may be selected.
470 A battery low level warning and alarm alert may be set. If battery
472 time is not available from the OS and the estimate time mode is not
473 set, the alert units will be battery percent level. Otherwise the
474 alert units will be battery time left in minutes. If OS battery time
475 is not available and the estimate time mode is set when the alert is
476 created, the alert will have units of time left in minutes and the
477 alert will automatically be destroyed if the estimate time option is
478 subsequently turned off.
479 If the OS reports multiple batteries, the alert will be a master alert
481 which is duplicated for each battery.
482 CPU/Motherboard Sensors - Temperature, Voltages, and Fan RPM
485 Linux:
486 Sensor monitoring on Linux requires that either lm_sensors modules are
487 installed in your running kernel, that you run a kernel >= 2.6 with
488 sysfs sensors configured, or, for i386 architectures, that you have the
489 mbmon daemon running when gkrellm is started (as long as mbmon supports
490 reporting sensor values for your motherboard).
491 For lm_sensors to be used, gkrellm must be compiled with libsensors
493 support. It will be if the libsensors development package is installed
494 when gkrellm is compiled. Using libsensors is the preferred interface
495 on Linux since it is the only interface that will be up to date on sup‐
496 porting correct voltage scaling factors and offsets for recent sensor
497 chips.
498 If the mbmon daemon is used, it must be started before gkrellm like so:
500 mbmon -r -P port-number
502 where the given "port-number" must be configured to match in the
504 gkrellm Sensors->Options config. If you have mbmon installed from a
505 distribution package, you can probably easily set up for mbmon to be
506 started at boot. With Debian, for example, you would edit the file
507 /etc/default/mbmon to set:
508 START_MBMON=1
510 and you would need to set in the gkrellm Sensors->Option config the
512 mbmon port to be "411" to match the default in the /etc/default/mbmon
513 file.
514 Sensor temperatures can also be read from /proc/acpi/thermal_zone,
516 /proc/acpi/thermal, /proc/acpi/ibm, the PowerMac Windfarm /sysfs inter‐
517 face, and PowerMac PMU /sysfs based sensors.
518 When using lm_sensors, libsensors will be used if available, but if
520 libsensors is not linked into the program, the sensor data will be read
521 directly from the /sysfs or /proc file systems. If running a newer
522 Linux kernel sensor module not yet supported by libsensors and libsen‐
523 sors is linked, there will also be an automatic fallback to using
524 /sysfs as long as libsensors doesn't detect any sensors. But if it
525 does detect some sensors which does not include the new sensors you
526 need, you can force getting /sysfs sensor data either by running:
527 gkrellm --without-libsensors
529 or by rebuilding with:
531 make without-libsensors=yes
533 Disk temperatures may also be monitored if you have the hddtemp daemon
535 running when gkrellm is started. gkrellm uses the default hddtemp port
536 of 7634. Like mbmon, hddtemp is best started in a boot script to guar‐
537 antee it will be running when gkrellm is started.
538 NVIDIA graphics card GPU temperatures may also be monitored if the
540 nvidia-settings command is installed and your Nvidia card supports the
541 temperature reporting. If nvidia-settings is not installed or does not
542 report temperatures for your card, an option for using the nvclock pro‐
543 gram will appear in the Sensors config. Nvclock use is not automati‐
544 cally enabled as is nvidia-settings because nvclock can add seconds of
545 gkrellm startup time when used on a NVIDIA GPU chipset it does not sup‐
546 port. GKrellM must be restarted to recognize changes for the nvclock
547 option.
548 Windows:
550 Requires a MBM install: http://mbm.livewiredev.com/.
551 FreeBSD:
553 Builtin sensor reporting is available for some sensor chips. FreeBSD
554 systems can also read sensor data from the mbmon daemon as described in
555 the Linux section above.
556 NetBSD:
558 Builtin sensor reporting is available for some sensor chips. NetBSD
559 uses the envsys(4) interface and sensors reading is automatically
560 enabled if you have either a lm(4) or viaenv(4) chip configured in your
561 kernel.
562 General Setup:
564 Temperature and fan sensor displays may be optionally located on the
565 CPU or Proc panels to save some vertical space while voltages are
566 always displayed on their own panel. If you set up to monitor both a
567 temperature and a fan on a single CPU or Proc panel, they can be dis‐
568 played optionally as an alternating single display or as separate dis‐
569 plays. If separate, the fan display will replace the panel label. The
570 configuration for this is under the CPU and Proc config pages.
571 If not using libsensors, in the Setup page for the Sensors config enter
573 any correction factors and offsets for each of the sensors you are mon‐
574 itoring (see below and lm_sensor documentation). For Linux, default
575 values are automatically provided for many sensor chips.
576 But if using libsenors, it is not possible to enter correction factors
578 and offsets on the Sensors config page because libsensors configuration
579 is done in the /etc/sensors.conf file. To get sensor debug output and
580 to find out the sensor data source, run:
581 gkrellm -d 0x80
583 Note for NetBSD users:
585 The current implementation of the sensor reading under NetBSD
586 opens /dev/sysmon and never closes it. Since that device does
587 not support concurrent accesses, you won't be able to run other
588 apps such as envstat(8) while GKrellM is running. This might
589 change if this happens to be an issue.
590 The reasons for this choice are a) efficiency (though it might
592 be possible to open/close /dev/sysmon each time a reading is
593 needed without major performance issue) and b) as of October
594 2001, there's a bug in the envsys(4) driver which sometimes
595 causes deadlocks when processes try to access simultaneously
596 /dev/sysmon (see NetBSD PR#14368). A (quick and dirty) work‐
597 around for this is to monopolize the driver :)
598 CPU/Motherboard Temperatures
601 Most modern motherboards will not require setting temperature correc‐
602 tion factors and offsets other than the defaults. However, for lm_sen‐
603 sors it is necessary to have a correct "set sensor" line in /etc/sen‐
604 sors.conf if the temperature sensor type is other than the default
605 thermistor. If using Linux sysfs sensors, this sensor type would be
606 set by writing to a sysfs file. For example, you might at boot set a
607 sysfs temperature sensor type with:
608 echo "2" > /sys/bus/i2c/devices/0-0290/sensor2
610 On the other hand, some older motherboards may need temperature cali‐
612 bration by setting a correction factor and offset for each temperature
613 sensor because of factors such as variations in physical thermistor
614 contact with the CPU. Unfortunately, this calibration may not be prac‐
615 tical or physically possible because it requires that somehow you can
616 get a real CPU temperature reading. So, the calibration discussion
617 which follows should probably be considered an academic exercise that
618 might give you some good (or bad) ideas. If you have a recent mother‐
619 board, skip the following.
620 Anyway, to do this calibration, take two real CPU temperature readings
622 corresponding to two sensor reported readings. To get the real read‐
623 ings, you can trust that your motherboard manufacturer has done this
624 calibration and is reporting accurate temperatures in the bios, or you
625 can put a temperature probe directly on your CPU case (and this is
626 where things get impractical).
627 Here is a hypothetical CPU calibration procedure. Make sure gkrellm is
629 configured with default factors of 1.0 and offsets of 0 and is report‐
630 ing temperatures in centigrade:
631 1 · Power on the machine and read a real temperature T1 from the
633 bios or a temperature probe. If reading from the bios, proceed
634 with booting the OS. Now record a sensor temperature S1 as
635 reported by gkrellm.
636 2 · Change the room temperature environment (turn off your AC or
638 change computer fan exhaust speed). Now repeat step 1, this
639 time recording a real temperature T2 and gkrellm reported sensor
640 temperature S2.
641 3 · Now you can calculate the correction factor and offset you need
643 to enter into the Sensor configuration tab:
644 From:
646 s - S1 t - T1
648 ------ = ------
649 S2 - S1 T2 - T1
650 T2 - T1 S2*T1 - S1*T2
652 t = s * ------- + -------------
653 S2 - S1 S2 - S1
654 So:
656 T2 - T1 S2*T1 - S1*T2
658 factor = ------- offset = -------------
659 S2 - S1 S2 - S1
660 Voltage Sensor Corrections
664 You need to read this section only if you think the default voltage
665 correction factors and offsets are incorrect. For Linux and lm_sensors
666 and sysfs sensors
667 this would be if gkrellm does not know about your particular sensor
668 chip. For MBM with Windows, the default values should be correct.
669 Motherboard voltage measurements are made by a variety of sensor chips
671 which are capable of measuring a small positive voltage. GKrellM can
672 display these voltage values and can apply a correction factor, offset,
673 and for the negative voltages of some chips (lm80), a level shifting
674 reference voltage to the displayed voltage. There are four cases to
675 consider:
676 1 · Low valued positive voltages may be directly connected to the
678 input pins of the sensor chip and therefore need no correction.
679 For these, the correction factor should be 1.0 and the offset
680 should be 0.
681 2 · Higher valued positive voltages will be connected to the input
683 pins of the sensor chip through a 2 resistor attenuation cir‐
684 cuit. For these, the correction factor will be a ratio of the
685 resistor values and the offset will be 0.
686 3 · Negative voltages will be connected to the input pins of the
688 sensor through a 2 resistor attenuation circuit with one of the
689 resistors connected to a positive voltage to effect a voltage
690 level shift. For these (lm80), the correction factor and offset
691 will be ratios of the resistor values, and a reference voltage
692 must be used.
693 4 · Some sensor chips (w83782, lm78) are designed to handle negative
695 inputs without requiring an input resistor connected to a volt‐
696 age reference. For these, there will be a correction factor and
697 a possible offset.
698 For cases 2 and 3, the sensor chip input network looks like:
700 Vs o----/\/\/---o-------------o Vin
702 R1 |
703 o--/\/\/--o Vref
704 R2
705 where,
707 Vs is the motherboard voltage under measurement
709 Vin is the voltage at the input pin of the sensor chip and
711 therefore is the voltage reading that will need correc‐
712 tion.
713 Vref is a level shifting voltage reference. For case 2, Vref
715 is ground or zero. For case 3, Vref will be one of the
716 positive motherboard voltages.
717 The problem then is to compute correction factors and offsets as a
719 function of R1 and R2 so that GKrellM can display a computed mother‐
720 board voltage Vs as a function of a measured voltage Vin.
721 Since sensor chip input pins are high impedance, current into the pins
723 may be assumed to be zero. In that case, the current through R1 equals
724 current through R2, and we have:
725 (Vs - Vin)/R1 = (Vin - Vref)/R2
727 Solving for Vs as a function of Vin:
729 Vs = Vin * (1 + R1/R2) - (R1/R2) * Vref
731 So, the correction factor is: 1 + R1/R2
733 the correction offset is: - (R1/R2)
734 Vref is specified in the config separately from
735 the offset (for chips that need it).
736 Fortunately there seems to be a standard set of resistor values used
739 for the various sensor chips which are documented in the lm_sensor doc‐
740 umentation. The GKrellM sensor corrections are similar to the compute
741 lines you find with lm_sensors, with the difference that lm_sensors has
742 an expression evaluator which does not require that compute lines be
743 simplified to the single factor and offset required by GKrellM. But
744 you can easily calculate the factor and offset. For example, this
745 lm_sensor compute line for a case 2 voltage:
746 compute in3 ((6.8/10)+1)*@ , @/((6.8/10)+1)
748 yields a correction factor of ((6.8/10)+1) = 1.68 and an offset of
751 zero.
752 Note that the second compute line expression is not relevant in GKrellM
754 because there is never any need to invert the voltage reading calcula‐
755 tion. Also, the compute line '@' symbol represents the Vin voltage.
756 A more complicated compute line for a case 3 voltage:
758 compute in5 (160/35.7)*(@ - in0) + @, ...
760 can be rewritten:
762 compute in5 (1 + 160/35.7)*@ - (160/35.7)*in0, ...
764 so the correction factor is (1 + 160/35.7) = 5.48
766 and the correction offset is -(160/35.7) = -4.48
767 and the voltage reference Vref is in0
768 Here is a table of correction factors and offsets based on some typical
770 compute line entries from /etc/sensors.conf:
771 Compute line Factor Offset Vref
773 -------------------------------------------------
774 lm80 in0 (24/14.7 + 1) * @ 2.633 0 -
775 in2 (22.1/30 + 1) * @ 1.737 0 -
776 in3 (2.8/1.9) * @ 1.474 0 -
777 in4 (160/30.1 + 1) * @ 6.316 0 -
778 in5 (160/35.7)*(@-in0) + @ 5.482 -4.482 in0
779 in6 (36/16.2)*(@-in0) + @ 3.222 -2.222 in0
780 LM78 in3 ((6.8/10)+1)*@ 1.68 0 -
782 in4 ((28/10)+1)*@ 3.8 0 -
783 in5 -(210/60.4)*@ -3.477 0 -
784 in6 -(90.9/60.4)*@ -1.505 0 -
785 w83782 in5 (5.14 * @) - 14.91 5.14 -14.91 -
787 in6 (3.14 * @) - 7.71 3.14 -7.71 -
788 Command launching
792 Many monitors can be set up to launch a command when you click on the
793 monitor label. When a command is configured for a monitor, its label
794 is converted into a button which becomes visible when the mouse enters
795 the panel or meter area of the label. If the command is a console com‐
796 mand (doesn't have a graphical user interface), then the command must
797 be run in a terminal window such as xterm, eterm, or Gnome terminal.
798 For example running the "top" command would take:
799 xterm -e top
801 You can use the command launching feature to run commands related to
803 monitoring functions, or you may use it to have a convenient launch for
804 any command. Since gkrellm is usually made sticky, you can have easy
805 access to several frequently used commands from any desktop. This is
806 intended to be a convenience and a way to maximize utilization of
807 screen real estate and not a replacement for more full featured command
808 launching from desktops such as Gnome or KDE or others. Some launch
809 ideas for some monitors could be:
810 calendar:
812 gnomecal, evolution, or ical
813 CPU: xterm -e top or gps or gtop
815 inet: gftp or xterm -e ftpwho
817 net: mozilla, galeon, skipstone, or xterm -e slrn -C-
819 And so on... Tooltips can be set up for these commands.
821 Alerts
824 Most monitors can have alerts configured to give warnings and alarms
825 for data readings which range outside of configurable limits. Where
826 useful, a delay of the alert trigger can be configured. A warning or
827 alarm consists of an attention grabbing decal appearing and an optional
828 command being executed. For most monitors the command may contain the
829 same substitution variables which are available for display in the
830 chart or panel label format strings and are documented on configuration
831 Info pages. Additionally, the hostname may be embedded in the command
832 with the $H substitution variable.
833 If you have festival installed, either a warn or alarm command could be
835 configured to speak something. For example a CPU temperature alert
836 warn command could just speak the current temperature with:
837 sh -c "echo warning C P U is at $s degrees | esddsp festival --tts"
839 Assuming you have esd running.
841
844 A theme is a directory containing image files and a gkrellmrc configu‐
845 ration file. The theme directory may be installed in several loca‐
846 tions:
847 ~/.gkrellm2/themes
849 /usr/local/share/gkrellm2/themes
850 /usr/share/gkrellm2/themes
851 For compatibility with Gtk themes, a gkrellm theme may also be
853 installed as:
854 ~/.themes/THEME_NAME/gkrellm2
856 /usr/share/themes/THEME_NAME/gkrellm2
857 Finally, a theme you simply want to check out can be untarred anywhere
859 and used by running:
860 gkrellm -t path_to_theme
862 If you are interested in writing a theme, go to the Themes page at
864 http://www.gkrellm.net and there you will find a Theme making refer‐
865 ence.
866
870 gkrellm tries to load all plugins (shared object files ending in .so)
871 it finds in your plugin directory ~/.gkrellm2/plugins. The directories
872 /usr/local/lib64/gkrellm2/plugins and /usr/lib64/gkrellm2/plugins are
873 also searched for plugins to install.
874 Some plugins may be available only as source files and they will have
876 to be compiled before installation. There should be instructions for
877 doing this with each plugin that comes in source form.
878 If you are interested in writing a plugin, go to the Plugins page at
880 http://www.gkrellm.net and there you will find a Plugin programmers
881 reference.
882
886 When a local gkrellm runs in client mode and connects to a remote
887 gkrellmd server all builtin monitors collect their data from the
888 server. However, the client gkrellm process is running on the local
889 machine, so any enabled plugins will run in the local context (Flynn is
890 an exception to this since it derives its data from the builtin CPU
891 monitor). Also, any command launching will run commands on the local
892 machine.
893
896 ~/.gkrellm2
897 User gkrellm directory where are located configuration files,
898 user's plugins and user's themes.
899 ~/.gkrellm2/plugins
901 User plugin directory.
902 /usr/lib64/gkrellm2/plugins
904 System wide plugin directory.
905 /usr/local/lib64/gkrellm2/plugins
907 Local plugin directory.
908 ~/.gkrellm2/themes
910 User theme directory.
911 ~/.themes/THEME_NAME/gkrellm2
913 User theme packaged as part of a user Gtk theme.
914 /usr/share/gkrellm2/themes
916 System wide theme directory.
917 /usr/local/share/gkrellm2/themes
919 Local theme directory.
920 /usr/share/themes/THEME_NAME/gkrellm2
922 System wide theme packaged as part of a system wide Gtk theme.
923
926 This manual page was written by Bill Wilson <billw@gkrellm.net>.
927 http://www.gkrellm.net/
928
931 fstab(5), sudo(1), mount(8), pppd(8), umount(8)
932GNU/Linux Jul 25, 2019 gkrellm(1)