How can a CPU be busy during DMA access with burst mode transfer

During burst mode in a DMA access, the DMAC has control over the bus for the whole transfer session which includes DATA PREPARATION time as well as DATA transfer time, after the transfer is over, the DMA relinquish the system bus. So in the mean time, the cpu can neither fetch any instruction from the MAIN MEMORY, nor it can fetch any operand, it can atmost complete the instruction it was executing before if that don’t include the use of system bus. In the book I have seen as cpu busy percent is given by

Data preparation time/(data prep time + data transfer time) How can the cpu be busy during the data preparation time when the bus is not with it. This can be the concept behind CYCLE STEAL mode, since it gains the bus only during data transfer, but how during burst mode??

Does the Flail Snail’s “burst of destructive force” do no damage if it’s triggered by a cantrip such as Eldritch Blast?

My party encountered a Flail Snail in our adventures, and the Warlock in the party had no real combat ability versus said snail other than the Eldritch Blast cantrip. The Warlock missed their attack, and as such the DM rolled for the Flail Snail’s random effect. The way I am understanding this, only on a roll of 1 or 2 would the spell do anything other than miss.

The relevant passage, quoted from the flail snail’s statblock (emphasis mine):

Antimagic Shell. The snail has advantage on saving throws against spells, and any creature making a spell attack against the snail has disadvantage on the attack roll. If the snail succeeds on its saving throw against a spell or a spell attack misses it, an additional effect might occur, as determined by rolling a d6:

1–2. If the spell affects an area or has multiple targets, it fails and has no effect. If the spell targets only the snail, it has no effect on the snail and is reflected back at the caster, using the spell slot level, spell save DC, attack bonus, and spellcasting ability of the caster.

3–4. No additional effect.

5–6. The snail’s shell converts some of the spell’s energy into a burst of destructive force. Each creature within 30 feet of the snail must make a DC 15 Constitution saving throw, taking 1d6 force damage per level of the spell on a failed save, or half as much damage on a successful one.

If I am understanding this correctly, that would mean an attack cantrip would only have a 33% chance of a negative effect on a miss, and on a roll of 5 or 6 do zero damage regardless since cantrips are treated as 0-level spells.

Is this interpretation correct?

Expected value of next CPU burst using exponential averaging

The burst time is needed for Shortest Job First (SJF) and Shortest Run Time First (SRTF) scheduling. To get the approximate burst time, we use the equation $ $ \tau_{n + 1} = t_n + (1 – \alpha)\tau_n$ $

I want to ask whether $ \tau_{n + 1}$ is the predicted burst time of the $ n + 1$ th process or it is the predicted burst time of some process say p which is demanding the CPU for the $ n + 1$ th time.

Does a bag of holding burst if brought into the space created by Rope Trick?

A bag of holding has a special caveat:

Placing a bag of holding inside an extradimensional space created by a Handy Haversack, Portable Hole, or similar item instantly destroys both items and opens a gate to the Astral Plane.

Now, the 2nd level spell Rope Trick says:

(…) At the upper end of the rope, an invisible entrance opens to an extradimensional space that lasts until the spell ends.

The extradimensional space can be reached by climbing to the top of the rope. (…)

Is it safe to bring a bag of holding inside the rope trick extradimensional space?

What is my average burst damage with this character and how do I calculate it?

I’m trying to figure out what my average burst damage with this character would be but I’m at a loss for how to calculate all of it. Assume the target has an AC of 15 but with theoretically infinite health (so don’t worry about it dying, I’m only interested in the numbers).

My character is a level 7 Warlock 5 / Fighter 2, Hexblade Patron, Pact of the Blade with the Hex spell (we can assume that was cast before we attack). Invocations are Thirsting Blade, Improved Pact Weapon, and Eldritch Smite. Fighter has the two weapon fighting style. I also took the feat Dual Wielder. I have an 18 (+4) Charisma stat. My pact weapon is a rapier and the other weapon is a dagger. Both are receiving the bonus from my patron in this case.

So to help consolidate the information here’s this.

Warlock/Fighter 5/2

Hexblade Patron

Pact of the Blade

18 (+4) Charisma

Rapier pact weapon + dagger hex weapon

Two weapon fighting style

Dual Wielder feat

Target AC 15

Target is Hexed and affected by Hexblade’s Curse

If any more info is needed I’ll be glad to provide it.

Does ‘Distance Spell’ apply to ‘Sword Burst’

If this has been asked, I could not find it. Sorcerer has Sword burst cantrip, and is thinking of taking ‘Distance Spell’ metamagic. Will it change the range to 10′?

Similar to Metamagic Distant Spell and AoE spells but not quite answered, though Crawford’s tweet seems to imply it would work.

Although the spell has a range of 5′ it seems like distance spell would be increasing the area of affect in this case. So RAW it works, but likely shouldn’t??