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How Gas works in FEVM

Gas in FEVM works quite differently from the EVM. Instead of assigning a fixed gas cost in each instruction, FEVM charges FVM/FIL gas based on WASM code execution of the FEVM interpreter.

When executing a message that invokes an EVM contract, the FVM charges for the message chain inclusion (when the message originates off chain) and then invokes the actor that hosts the contract. The actor is an instance of the EVM actor, which uses the FEVM interpreter to

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>>> Running simulations with nodes: 1000, sources: 5, messages: 60, rng-state: #(3906201752 593635287 270152346 3570226858 1968263816 2261421116)
+++ gossipsub/v1.0
=== simulation summary ===
nodes: 1000
messages: 60
sources: 5
publish: 60
deliver: 60000
!!pubsub.message: 377370
!!pubsub.connect: 20000

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>>> Running simulations with nodes: 500, sources: 5, messages: 60, rng-state: #(450148173 3493484164 3958739570 345133728 1597196054 3722366174)
+++ gossipsub/v1.0
=== simulation summary ===
nodes: 500
messages: 60
sources: 5
publish: 60
deliver: 30000
!!pubsub.message: 189451
!!pubsub.connect: 10000

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>>> Running simulations with nodes: 250, sources: 5, messages: 60, rng-state: #(1288990669 1488285165 2465753151 3626470647 1609608140 743526869)
+++ gossipsub/v1.0
=== simulation summary ===
nodes: 250
messages: 60
sources: 5
publish: 60
deliver: 15000
!!pubsub.message: 96320
!!pubsub.connect: 5000

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Some Expirements with Episub

The gossipsub simulator now has experimental support for episub -- see also the discussion in the specs repo.

The episub extension comes with two new control messages, CHOKE and UNCHOKE. Choking a peer means instructing it to not directly forward messages, except self-published through flood publish, even though it remains in the mesh; instead the peer sends gossip. Unchoking a peer means instructing it to resume forwarding messages.

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#include <pthread.h>
#include <sys/types.h>

u_int64_t goid(void) {
  return (u_int64_t)pthread_self();
}

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(import :std/srfi/1
        :std/misc/list
        :gerbil/gambit/os)
(export main)

(def (accum1 lst)
  (let lp ((rest lst) (r []))
    (match rest
      ([e . rest]
       (lp rest (cons e r)))

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;; -*- Gerbil -*-
(import :std/sugar
        :std/getopt
        :std/iter
        :std/srfi/1
        :std/misc/pqueue
        :std/misc/shuffle
        :gerbil/gambit)
(export main)

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Cloning into '.'...
Switched to a new branch 'make'
Pulling cache layers for index.docker.io/gerbil/scheme:latest...
Done!
KernelVersion: 4.4.0-1060-aws
Components: [{u'Version': u'18.03.1-ee-3', u'Name': u'Engine', u'Details': {u'KernelVersion': u'4.4.0-1060-aws', u'Os': u'linux', u'BuildTime': u'2018-08-30T18:42:30.000000000+00:00', u'ApiVersion': u'1.37', u'MinAPIVersion': u'1.12', u'GitCommit': u'b9a5c95', u'Arch': u'amd64', u'Experimental': u'false', u'GoVersion': u'go1.10.2'}}]
Arch: amd64
BuildTime: 2018-08-30T18:42:30.000000000+00:00
ApiVersion: 1.37
Platform: {u'Name': u''}

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Calculating Peer Score Configuration Parameters

Configuration Parameters and Counters

Configuration parameters for a topic:

// P1
TimeInMeshWeight  float64
TimeInMeshQuantum time.Duration
TimeInMeshCap float64