Grid Simulator (WRONJ problem)

Name: Grid Simulator (WRONJ problem)
Author: jormigla

Livejormigla1 app · 6 installsEducationFreecom.wronj

Virtual grid to show the WRONJ problem

Alert me ★ Watch Open in Play ↗

Total installs: 6
Installs / day: —
Rating: —★
Released: 25 Aug 2020
Last update: 23 May 2026
Countries: —

Install history

exact counter from Google Play

30dAll

Installs per day · last 90 days

Change timeline

No changes recorded yet. We compare every crawl with the previous one and list title, icon, screenshots, description, version, price and availability changes here.

Country availability

Availability has not been checked for this app yet. “Check all countries” looks the app up in about 140 Google Play storefronts and shows where it is live, listed but not installable, or missing — plus any country-specific (custom) store listings.

Top countries

Country data will be available soon.

We estimate where downloads come from using the app’s position in Google Play’s top charts in about 140 countries. This app is not in any chart we have collected yet; the estimate appears as soon as it is.

Top chart positions

Not in any tracked top chart.

App manifest

Read this app's manifest from Google Play: permissions, declared SDKs, components and AdMob app ID. Saved analysis appears here automatically.

Data safety

declared by the developer on Google Play

No data shared with third parties
No data collected

This is the developer's own declaration, summarised from the Play listing. The permissions below show what the app is technically able to access.

Permissions

2 in 1 group

0 Sensitive0 Notable2 Routine

OtherRoutine2

Access to miscellaneous device features that don't fit other categories

Check whether you are online and whether you use Wi-Fi or mobile dataview network connections · ACCESS_NETWORK_STATE
Connect to the internet to load content and send datafull network access · INTERNET

Sensitive = can reach personal data, location, camera/mic or act on your behalf. Notable = changes how your device behaves. Routine = normal for almost every app. Source: Google Play's permission list for all versions of this app.

Store listing

Full description

When we compute a workload in a grid where the job scheduler that assigns the workload jobs to idle workers runs on a fixed number of execution threads, a performance slowdown can occur when the job scheduler is a bottleneck because the assignation tasks queue becomes a critical path of the process: we will call this issue the WRONJ (Workers at Rest On Next Job) problem. This application can configure and simulate a virtual grid where we show this phenomenon in action.

What's new

Change to use always light theme

Growing in Education

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