WowAce

When tanking on my Demon Hunter I tried to use Skada to keep track on my Demon Spikes uptime, but it shows the wrong %.
Even if I do nothing but use Shear and Demon Spikes or macro them together and just hit a dummy for several minutes, the addon shows the expected % for the first 10 seconds or so, but the % drops steadily the longer the fight is (ive had it show under 1% uptime as a result)

What steps will reproduce the problem?
1. Play tank Demon Hunter
2. Macro shear and Demon Spikes together, or just play a dungeon
3. hit a dummy for a few minutes, track buff uptime, and see the numbers drop

What version of the product are you using?
Latest version.

Copied from my reply on https://www.wowace.com/addons/skada/tickets/473-buff-debuff-uptime-showing-wrong-percentage/#c2

It seems like Skada is only tracking the initial application presence of a buff. I tested a couple of times on my DH with a 60 second target dummy fight. I used immolation aura on CD (every 13.6 sec) and at the 30 second mark used soul cleave to clear the initial soul fragment buff. I also was spamming shear so that within a few seconds at most a new soul fragment buff was applied. The results were:

• Soul Fragment uptime 44%, 40.6%
• Immolation Aura uptime 9.8%, 10.9%

There should have been around 75-90% uptime on Soul Fragment depending on RNG and as Immolation Aura lasts 6 seconds with a 13.6 sec CD it should have been around 40-44% even accounting for lag.

Given that I cleared my initial soul fragment buff at 30 seconds with soul cleave and assuming a second or two for the initial application presence to appear that 40-44% uptime would be for that initial application presence. Same for Immolation aura, it lasts 6 seconds(aka 10% of a minute)

Edit: after testing with demon spikes I actually think it stops counting the uptime after the first time the buff falls off. I tested this again with a 1 minute fight. I applied demon spikes and then reapplied it before the initial application fell off the results were a 18.2% uptime, which is pretty close to the expected 20% since demon spikes lasts 6 seconds (2 applications would be 12 seconds if done perfect) and I had to reapply slightly early.

I have the same issue with pretty much any character i play.. And i also posted a ticket a while ago https://www.wowace.com/addons/skada/tickets/473-buff-debuff-uptime-showing-wrong-percentage/ but didnt get any response. Tried Recount as well, but that addon is so weird with settings that i couldnt make it to track buff uptimes either. I hope this gets fixed soon because not everyone is uploading logs to check such stuff..

Fixed by my own, just replace at line 24 (modules/debuffs.lua):

else player.auras[aura.spellname].active = player.auras[aura.spellname].active + 1 end

by:

else player.auras[aura.spellname].active = player.auras[aura.spellname].active + 1 player.auras[aura.spellname].started = time() end

That fix is not quite right, as it will reduce the duration any buff that is reapplied before it ends.

Try this:

player.auras[aura.spellname].started = player.auras[aura.spellname].started or time()