Navico RADAR Plugin Optimization

[seandepagnier]

Originally Posted by merrimac

A good way to try this kind of stuff out is to install a virtual machine and run the tcp replay in that, onto the "host only" network that the VM software usually generates. This way you only need software, not hardware.

If you run Linux, try KVM or VirtualBox. KVM is great if you like fiddling, VBox is the easy option.

I have no movies or music to delete:

sean@coron:~$ df -h
Filesystem      Size  Used Avail Use% Mounted on
udev            922M     0  922M   0% /dev
tmpfs           188M   18M  171M  10% /run
/dev/sda1        57G   54G  566M  99% /
tmpfs           938M   84K  938M   1% /dev/shm
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
tmpfs           938M     0  938M   0% /sys/fs/cgroup
cgmfs           100K     0  100K   0% /run/cgmanager/fs
tmpfs           188M   60K  188M   1% /run/user/1000

I think I can't use a vm

[NahanniV]

Originally Posted by boat_alexandra

...
I have implemented color support, please verify because I no longer have a radar to play with.

Hi Sean,

I had a quick look:

Color support is working, but the performance of both Multi-Color and Mono-Color are nowhere near what they were last night ?
It's still good, just not as good.

Radar Only mode is working now, but it should be heads up.

Multi Sweep filter still blanks the screen.

Transparency is working correctly now.

Guard zone rendering appears to be working OK.

Cheers,
JM.

[NahanniV]

Originally Posted by NahanniV

Hi Sean,

I had a quick look:

Color support is working, but the performance of both Multi-Color and Mono-Color are nowhere near what they were last night ?
It's still good, just not as good.

Radar Only mode is working now, but it should be heads up.

Multi Sweep filter still blanks the screen.

Transparency is working correctly now.

Guard zone rendering appears to be working OK.

Cheers,
JM.

Good news! I am wrong on several counts. I should never try to rush through anything (see avatar).

The Multi Sweep filter is working, it was not working in a version I was testing for Douwe.

Also, The performance is fine. I had inadvertently switched to Vector charts, last version was tested with Raster charts. That makes a big performance difference even in RADAR only mode where they aren't visible ! Can the RADAR Only mode be changed somehow so that the non visible charts do not cause a performance hit ?

Sorry for the confusion,
JM.

[seandepagnier]

Originally Posted by NahanniV

Hi Sean,

I had a quick look:

Color support is working, but the performance of both Multi-Color and Mono-Color are nowhere near what they were last night ?
It's still good, just not as good.

The work got merged with some other recent changes which probably degraded performance. This also happens all the time in opencpn when someone else makes a change not realizing that it spoiled performance.

some of my changes were discarded by kees when he merged my work with douwe's... :sigh: I made this commit a second time so the performance should be back.

Could you give me what your cpu measurements are with and without the shader, and before and after you pull? I'm guessing you are using vector charts, it was less of an issue with raster before, but now it should be fine either way.

Radar Only mode is working now, but it should be heads up.

Multi Sweep filter still blanks the screen.

These should now be fixed.

Guard zone rendering appears to be working OK.

Yes, it isn't using the shader though.

[NahanniV]

Originally Posted by boat_alexandra

...
Could you give me what your cpu measurements are with and without the shader, and before and after you pull? I'm guessing you are using vector charts, it was less of an issue with raster before, but now it should be fine either way...

System cpu usage 1%
OpenCpn Idle 7%
All RADAR tests Mono-Color, refresh rate =5

62% Last version, shader on, Overlaying Vector
17% Last version, shader on, Overlaying Raster
62% Last version, shader on, Rader Only with Vector not displayed
17% Last version, shader on, Radar Only with Raster not displayed
45% Last version, shader off, Overlaying Vector
45% Last version, shader off, Overlaying Raster
45% Last version, shader off, Rader Only with Vector not displayed
45% Last version, shader off, Radar Only with Raster not displayed

16% This version, shader on, Overlaying Vector
16% This version, shader on, Overlaying Raster
16% This version, shader on, Rader Only with Vector not displayed
16% This version, shader on, Radar Only with Raster not displayed
45% This version, shader off, Overlaying Vector
45% This version, shader off, Overlaying Raster
45% This version, shader off, Rader Only with Vector not displayed
45% This version, shader off, Radar Only with Raster not displayed

Multi Sweep filter seems OK.

RADAR ONLY orientation seems OK.

Only issue I see is sometimes a few of the spokes don't display correctly, will send a screen capture from my test machine shortly.

Cheers,
JM.

[NahanniV]

Sean,

Here is a screen capture showing the strange spokes, they seem to happen when changing between Overlay and Radar Only mode, but other times too. After a min. or more they go away. Only happens in shader mode.

I think that's the last obvious problem.

[rgleason]

Yes, it's true that many have contributed time, considerable skills and effort - and it really shows with the posts here and the cooperative effort. So here is thanks to you all (and Sean who lent a big shoulder to get over a boulder.)

[muttnik]

Originally Posted by merrimac

Have you checked how the plugin handles (multiple) ethernet devices? It keeps joining multicast networks using each card in turn until it receives data from a radar, then 'sticks' to that network for the duration of the session. This has been done in a way that works on all three platforms. That isn't easy as all platforms have different ways of specifying which device/IP you want to multicast on.

Ah yes: Nice job on the getifaddrs() emulation on windows. My theory was probably wrong then.

Just a thought: if you've discovered the interface on which you're receiving data from the radar would it be an idea to do a setsockopt() on the transmit socket with IP_MULTICAST_IF and the address of the discovered interface? The assumption that you want to transmit commands on the same link that you're receiving them should probably hold true in most cases, although it would mean that you couldn't fix the issue with routing if that assumption didn't hold true.

[seandepagnier]

Originally Posted by NahanniV

System cpu usage 1%
OpenCpn Idle 7%
All RADAR tests Mono-Color, refresh rate =5

62% Last version, shader on, Overlaying Vector
17% Last version, shader on, Overlaying Raster
62% Last version, shader on, Rader Only with Vector not displayed
17% Last version, shader on, Radar Only with Raster not displayed
45% Last version, shader off, Overlaying Vector
45% Last version, shader off, Overlaying Raster
45% Last version, shader off, Rader Only with Vector not displayed
45% Last version, shader off, Radar Only with Raster not displayed

16% This version, shader on, Overlaying Vector
16% This version, shader on, Overlaying Raster
16% This version, shader on, Rader Only with Vector not displayed
16% This version, shader on, Radar Only with Raster not displayed
45% This version, shader off, Overlaying Vector
45% This version, shader off, Overlaying Raster
45% This version, shader off, Rader Only with Vector not displayed
45% This version, shader off, Radar Only with Raster not displayed

So clearly less cpu with the shader, but there should be a difference in cpu from the previous one without the shader...

Multi Sweep filter seems OK.

RADAR ONLY orientation seems OK.

Only issue I see is sometimes a few of the spokes don't display correctly, will send a screen capture from my test machine shortly.

Cheers,
JM.

For the spokes... hmm I have seen this and I think maybe it is a problem with the gltexsubimage call... Basically it's missing the last column so it just needs a +1 somewhere.

As for reducing cpu usage when charts aren't even shown. Yes it's possible but would require a function to be added to the plugin interface to support this.

[NahanniV]

Originally Posted by boat_alexandra

So clearly less cpu with the shader, but there should be a difference in cpu from the previous one without the shader...



For the spokes... hmm I have seen this and I think maybe it is a problem with the gltexsubimage call... Basically it's missing the last column so it just needs a +1 somewhere.

As for reducing cpu usage when charts aren't even shown. Yes it's possible but would require a function to be added to the plugin interface to support this.

All measurments were taken at max refresh rate, so there is still a lot of leeway to reduce CPU usage on slower systems by lowering that.

I think we can call this done if you can fix those bad spokes.

How much effort do you think it would take to get the shader working on OpenGL ES ?

Cheers,
JM.

[seandepagnier]

It already works on openglesv2, but not openglesv1 which we use currently. If we can switch to v2 then we also get FBO (hardware accelerated panning)

It's not so simple to switch because v2 has no fixed function pipeline.

[merrimac]

Oops, sorry about the failed merge. There were many pages of changes because Douwe had forgot to fix his editor settings at some point, and I had fixed those up on master just after you branched from Douwe's code.

Thanks again for your wonderful work, couldn't have done it! In fact I think this is so good I merged your new changes onto my master branch, even if that artifact is still visible (I saw this as well) but this is too important to keep from the other testers and people compiling from my sources.

[merrimac]

As to the 'radar only' mode, we really ought to create a new wxWindow with a 2nd wxCanvas and show the radar only mode there. This will also get rid of the (unwanted?) AIS triangles, allow a native head up mode, and improve performance as we're no longer drawing charts and then erasing them by painting black all over the main window!

If someone would like to help with that, I just don't have the time -- I am also working on Signal K and CANboat -- talking about that, I really need to reverse engineer my auto pilot controls so that I can control it from a smart watch...

[merrimac]

Originally Posted by boat_alexandra

I have no movies or music to delete:

sean@coron:~$ df -h
Filesystem      Size  Used Avail Use% Mounted on
udev            922M     0  922M   0% /dev
tmpfs           188M   18M  171M  10% /run
/dev/sda1        57G   54G  566M  99% /
tmpfs           938M   84K  938M   1% /dev/shm
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
tmpfs           938M     0  938M   0% /sys/fs/cgroup
cgmfs           100K     0  100K   0% /run/cgmanager/fs
tmpfs           188M   60K  188M   1% /run/user/1000

I think I can't use a vm

60 Gig disk, I suppose that is a laptop? I've got some 'spare' SATA 2.5 disks for you, if you're interested?

[seandepagnier]

Yes, but I have no sata ports.