Apply simple arithmetic operations on values?

[meklubba]

Hi!

Is it possible to say divide a calculated value (id=@01) with another calculated value (id=@02) and display the result or have the result determining graph_min or graph_max?

/Daniel

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[CF Mark]

Not at the moment.
I could make up a plugin to handle it though.

What are you trying to do?

 

[meklubba]

My thought was to use it for histograms over network trafic. I discovered that setting the min/max values to -1 makes them autoadjust. Nifty feature btw.
I wanted a percentage usage histogram but I read that the perfmon value for a NICs current bandwith often is the nominal bandwidth (i.e. 100mbps) and then the utilization value would seldom go over 5% which makes it unusefull.
However, I can think of other situations that would prefer such a plugin, say you get the uptime value from perfmon, not from the predefined static id since it is formatted as a string, and want to format it in your own way that requires calculating the elapsed amount of seconds, minutes, hours and so on manually.

Such a plugin would be nice, but still, for now, I don't think it has high priority.

/Daniel

 

[CF Mark]

My thought was to use it for histograms over network trafic. I discovered that setting the min/max values to -1 makes them autoadjust. Nifty feature btw.

So that works ok then?
I never tested it much.
I havnt heard of anyone using it until now

I wanted a percentage usage histogram but I read that the perfmon value for a NICs current bandwith often is the nominal bandwidth (i.e. 100mbps) and then the utilization value would seldom go over 5% which makes it unusefull.
However, I can think of other situations that would prefer such a plugin, say you get the uptime value from perfmon, not from the predefined static id since it is formatted as a string, and want to format it in your own way that requires calculating the elapsed amount of seconds, minutes, hours and so on manually.

Such a plugin would be nice, but still, for now, I don't think it has high priority.
[/B]

I see.
Well ill add it to my now massive to-do list.

 

[meklubba]

Feels great to contribute to your massive to-do list!

The autoadjust feature works good. All previous visible histogram bars changes in proportion to the highest bar when a higher bar is displayed. The only downside is that if you, as in my case, are displaying a histogram over the bps currently beeing received by the NIC you will have at least one bar in full hight all the time (even if you are receiving 1 bps or 10 Mbps). This could give you a false impression that your NIC is havily used.

I've encountered two problems. I think it is like this, but I have to get back to confirm when I get home and can test it. If I set graph_min=0 and graph_max=-1 (min is 0bps and max is auto) then the histogram is not working at all and if I have min and max = -1 I get a constant histogram of half bar hight for the two rows displaying incoming "E in:" and "I in:" when there is no activity on the NICs.
EDIT: If I set graph_min=0 and graph_max=-1 I get a constant histogram of full hight.

multiplier=0.0009765625 is for converting bytes/sec to Mbytes/sec.
E and I on the screen stands for External (to Internet) NIC and Internal (to my intranet) NIC. Here's the screen definition file:


[pre]
rows=4
cols=20

[from00]
from="cc2_perfmon.ini"
sec="perf#"
opt01="id=@01"
opt02="full_name=\Network Interface(Intel[R] PRO_1000 CT Network Connection - Packet Scheduler Miniport)\Bytes Received/sec"
opt03="precision=0"
opt04="multiplier=0.0009765625"

[from01]
from="cc2_perfmon.ini"
sec="perf#"
opt01="id=@02"
opt02="full_name=\Network Interface(Intel[R] PRO_1000 CT Network Connection - Packet Scheduler Miniport)\Bytes Sent/sec"
opt03="precision=0"
opt04="multiplier=0.0009765625"

[from02]
from="cc2_perfmon.ini"
sec="perf#"
opt01="id=@03"
opt02="full_name=\Network Interface(D-Link DFE-530TX PCI Fast Ethernet Adapter [rev.A] - Packet Scheduler Miniport)\Bytes Received/sec"
opt03="precision=0"
opt04="multiplier=0.0009765625"

[from03]
from="cc2_perfmon.ini"
sec="perf#"
opt01="id=@04"
opt02="full_name=\Network Interface(D-Link DFE-530TX PCI Fast Ethernet Adapter [rev.A] - Packet Scheduler Miniport)\Bytes Sent/sec"
opt03="precision=0"
opt04="multiplier=0.0009765625"

[from04]
from="cc2_histogram.ini"
sec="graph#"
opt01="id_data=@01"
opt02="width=10"
opt03="height=1"
opt04="id3=@"
opt05="id2=@"
opt06="id1=@"
opt07="id0=@06"
opt08="scroll_speed=500"
opt09="graph_min=-1"
opt10="graph_max=-1"
opt11=id_gmin=@"
opt12="id_gmax=@"

[from05]
from="cc2_histogram.ini"
sec="graph#"
opt01="id_data=@02"
opt02="width=10"
opt03="height=1"
opt04="id3=@"
opt05="id2=@"
opt06="id1=@"
opt07="id0=@07"
opt08="scroll_speed=500"
opt09="graph_min=-1"
opt10="graph_max=-1"
opt11=id_gmin=@"
opt12="id_gmax=@"

[from06]
from="cc2_histogram.ini"
sec="graph#"
opt01="id_data=@03"
opt02="width=10"
opt03="height=1"
opt04="id3=@"
opt05="id2=@"
opt06="id1=@"
opt07="id0=@08"
opt08="scroll_speed=500"
opt09="graph_min=-1"
opt10="graph_max=-1"
opt11=id_gmin=@"
opt12="id_gmax=@"

[from07]
from="cc2_histogram.ini"
sec="graph#"
opt01="id_data=@04"
opt02="width=10"
opt03="height=1"
opt04="id3=@"
opt05="id2=@"
opt06="id1=@"
opt07="id0=@09"
opt08="scroll_speed=500"
opt09="graph_min=-1"
opt10="graph_max=-1"
opt11=id_gmin=@"
opt12="id_gmax=@"

[screen]
screen_name="Net Send/Receive Usage Histogram"
options=0
alt_delay=5000

[r00]
options=0

[r00-i00]
length=5
string="E In:"

[r00-i01]
length=5
options=0
id=@01

[r00-i02]
id=@06

[r01]
options=0

[r01-i00]
length=5
string="EOut:"

[r01-i01]
length=5
options=0
id=@02

[r01-i01]
id=@07

[r02]
options=0

[r02-i00]
length=5
string="I In:"

[r02-i01]
length=5
options=0
id=@03

[r02-i02]
id=@08

[r03]
options=0

[r03-i00]
length=5
string="I Out:"

[r03-i01]
length=5
options=0
id=@04

[r03-i01]
id=@09

/Daniel