package octez-shell-libs

  1. Overview
  2. Docs
package octez-shell-libs
Legend:
Library
Module
Module type
Parameter
Class
Class type

Helpers for loading contexts, saving contexts, writing to contexts, etc. Also contains the Key_map module, heavily used for preparing benchmarks and computing statistics.

val assert_ok : msg:string -> 'a Tezos_base.TzPervasives.tzresult -> 'a
val prepare_empty_context : string -> (Tezos_base.TzPervasives.Context_hash.t, Tezos_base.TzPervasives.tztrace) Stdlib.result Lwt.t
val with_context : base_dir:string -> context_hash:Tezos_base.TzPervasives.Context_hash.t -> (Tezos_protocol_environment.Context.t -> 'a Lwt.t) -> 'a
val prepare_base_dir : string -> unit

This function updates the context with random bytes at a given depth.

module Key_map : sig ... end

Maps from string lists to bytes. No balancing. A key cannot be a prefix or a suffix to another key.

val sample_without_replacement : int -> 'a list -> 'a list * 'a list
val file_copy : string -> string -> unit
val set_infos : string -> Unix.stats -> unit
val iter_dir : (string -> unit) -> string -> unit
val copy_rec : string -> string -> unit
val split_absolute_path : string -> string list option

Split a absolute path name.

For example, split_absolute_pat "/a/b/c" = Some ["a"; "b"; "c"]. It returns None for illigal paths such as "a/b/c", "/a/../b" and "/a/b/.".

val purge_disk_cache : unit -> unit

Purge disk cache.

This function assumes Linux OS and purge_disk_cache.exe is placed at the current directory, owned by root with setuid. The source code for purge_disk_cache.exe is available at devtools/benchmarks-tools/purge_disk_cache/.

Even if the function fails to execute the command, it does NOT fail but prints just a warning.

load_head_block data_dir takes the path of the Tezos node data directory (typically $HOME/.tezos-node) and returns the information of the current head.

module Meminfo : sig ... end

Reading /proc/meminfo. Only for Linux

val with_memory_restriction : float -> ((unit -> unit) -> 'a) -> 'a

with_memory_restriction gib f executes f trying to restrict the MemAvailable of /proc/meminfo to gib GiB. It only works in Linux.

Function f takes a function to re-restrict the MemAvailable during the exection of f.

val fill_disk_cache : rng:Stdlib.Random.State.t -> restrict_memory:(unit -> unit) -> Tezos_protocol_environment.Context.t -> (Tezos_protocol_environment.Context.key * _) array list -> unit Lwt.t

fill_disk_cache ~rng ~restrict_memory context keys loads keys in context randomly, until Linux kernel's disk cache is completely filled.

restrict_memory is the function obtained by with_memory_restriction. It is used to keep the amount of MemAvailable at the same level.

OCaml

Innovation. Community. Security.

GitHub Discord Twitter Peertube RSS
About
Changelog Releases Industrial Users Academic Users Why OCaml
Ecosystem
Packages Community Events OCaml Planet Jobs
Resources
Install OCaml Get Started Platform Tools Language Manual Standard Library API Books Exercises Papers OCaml Playground Logo
Policies
Carbon Footprint Governance Privacy Code of Conduct