Activity for Java Modelling Tools

Daniele modified ticket #143

Daniele — Tue, 16 Dec 2025 15:31:01 -0000

JVMA what-if bug open model

Daniele modified a comment on ticket #143

Daniele — Tue, 16 Dec 2025 15:29:53 -0000

Problem solved in the class src/main/java/jmt/jmva/analytical/ExactModel.java, where the correct line of code had been commented out and replaced with an incorrect one.

Daniele modified ticket #143

Daniele — Tue, 16 Dec 2025 15:29:40 -0000

JVMA what-if bug open model

Daniele posted a comment on ticket #143

Daniele — Tue, 16 Dec 2025 15:28:07 -0000

@carlinocalogero fixed the bug. Problem solved in the class src/main/java/jmt/jmva/analytical/ExactModel.java, where the correct line of code had been commented out and replaced with an incorrect one.

Giuliano Casale committed [3a9f94] on Code

Giuliano Casale — Fri, 25 Jul 2025 00:34:02 -0000

Integrated fixes to batches

Giuliano Casale committed [50fa05] on Code

Giuliano Casale — Wed, 23 Jul 2025 06:41:02 -0000

Integration of latest JMCH changes. Increased version to BETA2.

augusto saldivar created ticket #149

augusto saldivar — Fri, 11 Jul 2025 16:00:13 -0000

save graph in simulation results

Giuliano Casale created ticket #148

Giuliano Casale — Sun, 06 Jul 2025 06:46:59 -0000

Switchover times no longer work

Giuliano Casale committed [9b8c68] on Code

Giuliano Casale — Sat, 14 Jun 2025 05:35:26 -0000

Initial integration of vacation feature.

serazzi posted a comment on discussion Help

serazzi — Fri, 06 Jun 2025 10:27:27 -0000

no problem Zahra, we are happy to help people use JMT! Best regards, giuseppe

zahra zafarzade posted a comment on discussion Help

zahra zafarzade — Fri, 06 Jun 2025 09:10:16 -0000

Dear Giuseppe, Thank you very much for your clear and well-structured response. The explanation clarified the topic for me. I truly appreciate your support and time. Best regards, Zahra

Anonymous posted a comment on discussion Help

Anonymous — Thu, 05 Jun 2025 21:42:22 -0000

Hi, below you will find answers to your questions. Q---- Which parameter of the hyperexponential distribution does JMT change when I control the arrival rate in What-if? A----The WhatIF with Arrival Rate as control parameter change the MEAN values (derived from the arrival rates required as input parameters from the WhatIF). Keeping fixed the coefficient of variation CV and the probability p , JSIM compute the rates λ₁, λ₂ necessary to obtain the Mean and CV required. Please note that the first time...

zahra zafarzade posted a comment on discussion Help

zahra zafarzade — Wed, 04 Jun 2025 20:12:36 -0000

Hi everyone, In my model, I defined the arrival process using a hyperexponential distribution (e.g., with λ₁ = 1.5, λ₂ = 6.0 and probability p = 0.2). When I run a What-if analysis using arrival rate as the control parameter, I’m confused about how JMT applies this variation in the context of a hyperexponential distribution. My key questions: Which parameter of the hyperexponential distribution does JMT change when I control the arrival rate in What-if? Is it just the mean (adjusted through scaling)?...

Giuliano Casale created ticket #147

Giuliano Casale — Sun, 25 May 2025 06:53:44 -0000

Problem with modes

Giuliano Casale modified ticket #146

Giuliano Casale — Fri, 16 May 2025 20:11:13 -0000

Problem with branch probabilities

Giuliano Casale created ticket #146

Giuliano Casale — Fri, 16 May 2025 20:01:22 -0000

Problem wit branch probabilities

Giuliano Casale created ticket #145

Giuliano Casale — Fri, 16 May 2025 16:14:18 -0000

SJF model returns incorrect Delay results

Giuliano Casale committed [d5f845] on Code

Giuliano Casale — Fri, 09 May 2025 10:10:16 -0000

Reinstanted mva examples.

Giuliano Casale created ticket #158

Giuliano Casale — Wed, 07 May 2025 13:16:01 -0000

Inhomogeneous Poisson process

Giuliano Casale created ticket #157

Giuliano Casale — Wed, 07 May 2025 13:14:39 -0000

Allow recording of performance metrics seen upon arrival or upon departure to/from a station

Giuliano Casale created ticket #156

Giuliano Casale — Wed, 07 May 2025 13:12:43 -0000

Cache GUI pending development in JSIMgraph

Giuliano Casale created ticket #144

Giuliano Casale — Wed, 07 May 2025 13:07:12 -0000

Add new warning if no priority scheduling policy is configured and at least one class has a priority population

Giuliano Casale modified ticket #141

Giuliano Casale — Wed, 07 May 2025 13:06:00 -0000

Advanced queueing extensions

Giuliano Casale created ticket #155

Giuliano Casale — Wed, 07 May 2025 13:03:02 -0000

Add templates with a gallery of elementary models (e.g., M/M/1 etc)

Giuliano Casale created ticket #154

Giuliano Casale — Wed, 07 May 2025 13:02:09 -0000

"Save Stats" feature could add an option to save the autocorrelation function

Anonymous created ticket #153

Anonymous — Wed, 07 May 2025 12:57:51 -0000

Add a button JSIMwiz to JSIMgraph

Giuliano Casale created ticket #143

Giuliano Casale — Mon, 07 Apr 2025 09:54:37 -0000

JVMA what-if bug open model

Anonymous posted a comment on discussion Help

Anonymous — Wed, 05 Mar 2025 14:26:45 -0000

Hi, in the JMT User Manual, sections 1.2 and 1.3 there are some brief instructions for the installation. It is very simple and only takes a few clicks. From the home page of JMT www.sourceforge.net you may download the recommended relase 1.3.0 , then follow the link Documentation and then you may download the User Manual and the Book Performance Engineering that describes how to implement models (Getting Started Indications). I downloaded now the JMT-installer-1.3.0.jar version, then i started its...

Anonymous posted a comment on discussion Help

Anonymous — Wed, 05 Mar 2025 11:53:36 -0000

Hi I'm trying to install JMT on my computer running Linux Ubuntu but I get an error. I execute the command java -jar JMT-installer-1.3.0.jar and the system produces this error: Command line arguments: SEVERE: java.lang.ArrayIndexOutOfBoundsException: Index 70131 out of bounds for length 22674 Any idea on how to fix it? Also, where can I find the documentation for the package installation? Thanks -- Davide Chicco

Daniele Borgna posted a comment on discussion Help

Daniele Borgna — Tue, 11 Feb 2025 22:44:51 -0000

Additionally, also with your model I have a stuck situation with 99 Analyzed samples instead of keeping until 1000000 or convergence because some jobs are not triggering the join on their second iteration.

Daniele Borgna posted a comment on discussion Help

Daniele Borgna — Tue, 11 Feb 2025 22:43:06 -0000

It is similar but J1.1 does not spawn from the J1Source. I attach my model..

Anonymous posted a comment on discussion Help

Anonymous — Tue, 11 Feb 2025 22:27:37 -0000

Hi, maybe I didn't understand your model well. Anyway, I implemented the attached jsimg model with the same layout and some parameters that may differ from yours. The simulation is running and the Join1 has a non-zero throughput. If you can send me your jsim model I could be more precise. Best regards, gs

Daniele Borgna posted a comment on discussion Help

Daniele Borgna — Tue, 11 Feb 2025 14:32:42 -0000

Hello. I'm working with a Guard policy in a join and created a simple example to replicate the error I encountered. I have one closed class, J1, generated in the J1 Source. This job is forked into two sub-jobs of the same class. Then, one of the jobs is sent to the Class Switch and becomes J1.1. In the Join node, the policy used for the J1 class (the parent job class) is Guard, with 1 job for J1.1 and 0 for J1. This should mean that when the J1.1 job is received at the join, the J1 job is unlocked...

Daniele Borgna created ticket #2

Daniele Borgna — Tue, 11 Feb 2025 14:30:13 -0000

Guard policy of a Join not working

Anonymous posted a comment on discussion Help

Anonymous — Fri, 22 Nov 2024 06:58:06 -0000

how to installe

Giuliano Casale committed [0488a8] on Code

Giuliano Casale — Sat, 02 Nov 2024 10:59:52 -0000

Merged new JMCH code.

Giuliano Casale committed [be4307] on Code

Giuliano Casale — Mon, 21 Oct 2024 04:24:01 -0000

Fixed bug in Server.java; reinstanted old JMCH as default.

Java Modelling Tools updated /jmt/JMT-1.3.0/JMT-singlejar-1.3.0.jar

Java Modelling Tools — Mon, 21 Oct 2024 04:13:02 -0000

Java Modelling Tools updated /jmt/JMT-1.3.0/JMT-installer-1.3.0.jar

Java Modelling Tools — Mon, 21 Oct 2024 04:12:03 -0000

Giuliano Casale created ticket #152

Giuliano Casale — Mon, 16 Sep 2024 08:44:58 -0000

Add unit tests to check that a new version can load jsimg files of older versions

Giuliano Casale committed [d136c0] on Code

Giuliano Casale — Mon, 09 Sep 2024 06:25:59 -0000

Rollback of xerces version. Small refactorings.

Giuliano Casale created ticket #142

Giuliano Casale — Tue, 03 Sep 2024 08:30:34 -0000

What-if result bug

Giuliano Casale modified ticket #140

Giuliano Casale — Tue, 03 Sep 2024 07:08:46 -0000

Graphical bug in Class Switch routing policy

Giuliano Casale posted a comment on ticket #140

Giuliano Casale — Tue, 03 Sep 2024 07:08:46 -0000

See bottom right

Giuliano Casale created ticket #140

Giuliano Casale — Tue, 03 Sep 2024 07:07:54 -0000

Graphical bug in Class Switch routing policy

Giuliano Casale merged merge request #1 on Code

Giuliano Casale — Sun, 18 Aug 2024 16:07:04 -0000

Test

Giuliano Casale created merge request #1 on Code

Giuliano Casale — Sun, 18 Aug 2024 16:06:57 -0000

Test

Giuliano Casale committed [83cc07] on Code

Giuliano Casale — Sun, 18 Aug 2024 16:02:03 -0000

Merged initial JMCH revision.

Giuliano Casale committed [401f13] on Code

Giuliano Casale — Sun, 28 Jul 2024 14:08:00 -0000

chore: added gitignore and maven files.

Giuliano Casale committed [b0a37c] on Code-Git

Giuliano Casale — Sun, 28 Jul 2024 13:49:43 -0000

Initial commit at SVN r1153.

Giuliano Casale committed [r1153] on Code

Giuliano Casale — Wed, 24 Jul 2024 09:03:48 -0000

Quanta-based processor sharing. Bug fixes. Refactored exact/ to jmva/

Giuliano Casale modified ticket #81

Giuliano Casale — Sun, 14 Jul 2024 16:49:34 -0000

Poor GUI scaling under large resolution

Giuliano Casale created ticket #151

Giuliano Casale — Sun, 14 Jul 2024 06:07:09 -0000

Summary window that shows all parameters

Giuliano Casale created ticket #150

Giuliano Casale — Sun, 14 Jul 2024 06:01:06 -0000

Autocorrelation in statistical results

Giuliano Casale modified ticket #125

Giuliano Casale — Sun, 14 Jul 2024 05:59:58 -0000

Add priority service for PS/DPS/GPS

Giuliano Casale posted a comment on ticket #125

Giuliano Casale — Sun, 14 Jul 2024 05:59:58 -0000

done in 1.3.1

Giuliano Casale posted a comment on ticket #146

Giuliano Casale — Sun, 14 Jul 2024 05:53:35 -0000

Arena simulator allows to associate to each a set fo stations

Giuliano Casale committed [r1152] on Code

Giuliano Casale — Sat, 13 Jul 2024 19:51:22 -0000

Initial 1.3.1-BETA1 version

Java Modelling Tools released /jmt/JMT-1.3.0/JMT-installer-1.3.0.jar

Java Modelling Tools — Mon, 01 Jul 2024 19:54:03 -0000

Java Modelling Tools released /jmt/JMT-1.3.0/JMT-singlejar-1.3.0.jar

Java Modelling Tools — Mon, 01 Jul 2024 19:54:03 -0000

Java Modelling Tools released /jmt/JMT-1.3.0/readme.textile

Java Modelling Tools — Fri, 28 Jun 2024 08:31:03 -0000

Java Modelling Tools released /jmt/JMT-1.3.0/readme.textile

Java Modelling Tools — Fri, 28 Jun 2024 08:07:02 -0000

Java Modelling Tools released /jmt/JMT-1.3.0/JMT-installer-1.3.0.jar

Java Modelling Tools — Fri, 28 Jun 2024 07:42:02 -0000

Java Modelling Tools released /jmt/JMT-1.3.0/JMT-singlejar-1.3.0.jar

Java Modelling Tools — Fri, 28 Jun 2024 07:42:02 -0000

Giuliano Casale committed [r1151] on Code

Giuliano Casale — Fri, 28 Jun 2024 07:30:28 -0000

Final version 1.3.0 code and manual.

Giuliano Casale committed [r1150] on Code

Giuliano Casale — Wed, 26 Jun 2024 05:09:41 -0000

Disabled connection Place-Queue

Giuliano Casale committed [r1149] on Code

Giuliano Casale — Mon, 10 Jun 2024 07:48:36 -0000

GUI size fine tunings.

Java Modelling Tools released /jmt/JMT-1.3.0-BETA3/JMT-singlejar-1.3.0-BETA3.jar

Java Modelling Tools — Thu, 06 Jun 2024 07:28:03 -0000

Giuliano Casale modified ticket #149

Giuliano Casale — Thu, 06 Jun 2024 07:25:47 -0000

Add response time panel to JMVA

Giuliano Casale posted a comment on ticket #149

Giuliano Casale — Thu, 06 Jun 2024 07:25:35 -0000

This feature has now been added to the upcoming JMT-1.3.0 release.

Giuliano Casale modified ticket #131

Giuliano Casale — Thu, 06 Jun 2024 07:24:30 -0000

Graphics regression error

Giuliano Casale committed [r1148] on Code

Giuliano Casale — Thu, 06 Jun 2024 07:00:15 -0000

Added height/width scaling coefficients.

Giuliano Casale committed [r1147] on Code

Giuliano Casale — Wed, 05 Jun 2024 10:31:29 -0000

Bug fixes. Added response time panel to JMVA.

Java Modelling Tools released /jmt/JMT-1.3.0-BETA3/JMT-singlejar-1.3.0-BETA3.jar

Java Modelling Tools — Tue, 04 Jun 2024 09:19:02 -0000

Giuliano Casale modified ticket #149

Giuliano Casale — Wed, 22 May 2024 14:01:34 -0000

Add response time panel to JMVA

Giuliano Casale posted a comment on ticket #149

Giuliano Casale — Mon, 20 May 2024 17:47:41 -0000

Thanks. We moved this to a feature request because this is what we refer to as aggregate response time rather than aggregate residence time. With JSIMgraph you will get the right value you say if you select the 'All classes' response time at the resource. Because JMVA's what-if shows only aggregate residence time, the request amounts to also showing aggregate response time in JMVA that is a new feature.

Giuliano Casale posted a comment on ticket #149

Giuliano Casale — Mon, 20 May 2024 17:44:01 -0000

Ticket moved from /p/jmt/bugs/136/

Giuliano Casale modified ticket #139

Giuliano Casale — Mon, 20 May 2024 06:39:34 -0000

Bug in JMVA to JSIMwiz conversion

Giuliano Casale created ticket #139

Giuliano Casale — Mon, 20 May 2024 06:39:26 -0000

Bug in JMVA to JSIMwiz conversion

Giuliano Casale created ticket #148

Giuliano Casale — Sat, 18 May 2024 17:51:43 -0000

Add sorting feature under the performance metrics definition panel

Greg Franks posted a comment on ticket #136

Greg Franks — Fri, 17 May 2024 13:01:17 -0000

The underlying MVA solver is working fine. MVA does not compute the average over all classes directly. Disk B does not see the system throughput. It only sees throughput from two classes. Since the average response time is computed using the throughput result, the value is too high (Disk B only sees a fraction of the total throughput).

Giuliano Casale modified a comment on ticket #136

Giuliano Casale — Fri, 17 May 2024 09:41:57 -0000

Many thanks for flagging this matter and sharing the additional results. We ran various checks also using CTMCs and exact MVA. We confirm that JMVA uses the scaling based on dividing by the System throughput. JMT as a whole follows the Lazowska's book conventions, so this is not a bug but rather a design choice. We also do not observe discrepancies in our tests between exact solvers and JMVA relative to the System Response Time (R), the values are consistent within the Lazowska's book conventions....

Giuliano Casale modified a comment on ticket #136

Giuliano Casale — Fri, 17 May 2024 09:41:16 -0000

Many thanks for flagging this matter and sharing the additional results. We ran various checks also using CTMCs and exact MVA. We confirm that JMVA uses the scaling based on dividing by the System throughput. JMT as a whole follows the Lazowska's book conventions, so this is not a bug but rather a design choice. We also do not observe discrepancies in our tests between exact solvers and JMVA relative to the System Response Time (R), they values are consistent within the Lazowska's book conventions....

Giuliano Casale posted a comment on ticket #136

Giuliano Casale — Fri, 17 May 2024 09:41:03 -0000

Many thanks for flagging this matter and sharing the additional results. We run various checks also using CTMCs and exact MVA. We confirm that JMVA uses the scaling based on dividing by the System throughput. JMT as a whole follows the Lazowska's book conventions, so this is not a bug but rather a design choice. We also do not observe discrepancies in our tests between exact solvers and JMVA relative to the System Response Time (R), they values are consistent within the Lazowska's book conventions....

Giuliano Casale modified ticket #138

Giuliano Casale — Fri, 17 May 2024 04:46:25 -0000

Lognormal regression bug

Giuliano Casale posted a comment on ticket #138

Giuliano Casale — Fri, 17 May 2024 04:46:25 -0000

fixed in 1.3.0

Greg Franks posted a comment on ticket #136

Greg Franks — Wed, 15 May 2024 15:40:05 -0000

I have attached the full output from qnap2. It includes the source code for qnap2. The output above is for Beta=1..5. Here is the output from JMVA for Disk B with Beta=5. The per-class results match (though qnap2 uses real*4). System response time is a derived value. ...

Giuliano Casale posted a comment on ticket #136

Giuliano Casale — Wed, 15 May 2024 14:32:01 -0000

Thank you for flagging this Greg, we are checking and we will follow up. This discrepency shows up in the System Response Time output. Would you please have more information on this point, in particular the system response time returned by QNAP2? Thanks.

Giuliano Casale posted a comment on ticket #138

Giuliano Casale — Wed, 15 May 2024 07:28:19 -0000

The bug is now verified. The correct version is the one used in 1.2.1

Giuliano Casale created ticket #138

Giuliano Casale — Tue, 14 May 2024 12:48:10 -0000

Lognormal regression bug

Giuliano Casale committed [r1146] on Code

Giuliano Casale — Mon, 13 May 2024 14:20:58 -0000

1.3.0-BETA3. Fixed Place-Queue integration bug. Initial versions of heterogeneous servers, remote updates, setup-delayoff, simulation log debugger.

Giuliano Casale modified ticket #146

Giuliano Casale — Mon, 13 May 2024 06:48:52 -0000

Seize and Release nodes