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ASTRA-sim Users

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May 19

ASTRA-sim Tutorial at ISCA 2026 (Saturday, June 27)

AMD General Hi everyone, I am co-organizing an ASTRA-sim tutorial at ISCA 2026. We cordially invite

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ASTRA-sim Tutorial at ISCA 2026 (Saturday, June 27)

AMD General Hi everyone, I am co-organizing an ASTRA-sim tutorial at ISCA 2026. We cordially invite

May 19

Apr 3

Seeking: Simulation and modeling leader for a Novel AI-accelerating Server

Here's the link to the simulation and modeling role at Sygaldry based on ASTRA-sim and Chakra:

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Seeking: Simulation and modeling leader for a Novel AI-accelerating Server

Here's the link to the simulation and modeling role at Sygaldry based on ASTRA-sim and Chakra:

Apr 3

Feb 9

Introducing ASTRA-sim Service

Dear ASTRA-sim users, We are excited to announce the launch of a new service within the ASTRA-sim

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Introducing ASTRA-sim Service

Dear ASTRA-sim users, We are excited to announce the launch of a new service within the ASTRA-sim

Feb 9

童青峰, Yoo, Jinsun3

12/7/25

astra-sim learner

Hello Jinsun: Hope you're doing well. Thank you again for your helpful response last time—it gave

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astra-sim learner

Hello Jinsun: Hope you're doing well. Thank you again for your helpful response last time—it gave

12/7/25

12/3/25

Fwd: Resume for the post of Independent Director(Optics).

Resume for the post of Independent Director(Optics).

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Fwd: Resume for the post of Independent Director(Optics).

Resume for the post of Independent Director(Optics).

12/3/25

Zhongkai Yu, Yoo, Jinsun2

11/4/25

About simulate NVL72 on Astra-sim

Hi Zhongkai, Thank you for reaching out to the mailing list! There are two ways you could generate

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About simulate NVL72 on Astra-sim

Hi Zhongkai, Thank you for reaching out to the mailing list! There are two ways you could generate

11/4/25

Vuchi Gnanasagar Subramanyam cs22b0922

9/20/25

Regarding Example Files

Also, the network_analytical folder (cloned from git) mentioned in the wiki page seems to be missing.

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Regarding Example Files

Also, the network_analytical folder (cloned from git) mentioned in the wiki page seems to be missing.

9/20/25

jinyuze...@gmail.com

7/16/25

Small Size packet during Hybrid Parallel Workloads

Dear Astra-Sim developers, I notice when running hybrid workloads, there can be a lot of small flows.

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Small Size packet during Hybrid Parallel Workloads

Dear Astra-Sim developers, I notice when running hybrid workloads, there can be a lot of small flows.

7/16/25

Dawei Li, Joongun Park6

7/3/25

Having an issue with capturing/converting chakra execution traces

Hi Dawei, Thank you so much for the update and suggestion! I believe HTA requires more complicated

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Having an issue with capturing/converting chakra execution traces

Hi Dawei, Thank you so much for the update and suggestion! I believe HTA requires more complicated

7/3/25

Annanya, Joongun Park2

7/2/25

Queries regarding using astra-sim

Hi Annanya, Apologies for the delayed response. The current public version of ASTRA-Sim consumes

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Queries regarding using astra-sim

Hi Annanya, Apologies for the delayed response. The current public version of ASTRA-Sim consumes

7/2/25

Y-y Hsieh (謝伊妍)

6/12/25

Issue for ASTRA-ns3 simulation

Dear ASTRA-sim developers, I have built the astra-ns3. The installation percentage achieved 100% but

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Issue for ASTRA-ns3 simulation

Dear ASTRA-sim developers, I have built the astra-ns3. The installation percentage achieved 100% but

6/12/25

Y-y Hsieh (謝伊妍), sfsharon3

6/10/25

Issues for Buiding Astra-sim and Running Chakra Trace Generator

Hi Yi-Yen. After a little more digging, it seems that the tool chakra.et_generator.et_generator is

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Issues for Buiding Astra-sim and Running Chakra Trace Generator

Hi Yi-Yen. After a little more digging, it seems that the tool chakra.et_generator.et_generator is

6/10/25

Sharon Fraiman, … Joongun Park8

6/6/25

Running the AstraSim simulation together with the HTSim network backend

Dear Sharon, I saw the discussion regarding the missing dependencies. It appears that the trace and

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Running the AstraSim simulation together with the HTSim network backend

Dear Sharon, I saw the discussion regarding the missing dependencies. It appears that the trace and

6/6/25

2/20/25

Astra-sim Validation

Dear Astra-Sim Developer Team and Users, Hope this email finds you well. I'm trying to reproduce

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Astra-sim Validation

Dear Astra-Sim Developer Team and Users, Hope this email finds you well. I'm trying to reproduce

2/20/25

2/19/25

Hello, in the previous version of your Astra-Sim, a section was considered as a result. I wanted to

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Hello, in the previous version of your Astra-Sim, a section was considered as a result. I wanted to

2/19/25

李文杰, Yoo, Jinsun2

1/28/25

network layer questions

Hi Wenjie, thank you for reaching out! Please find my answers below. Best, Jinsun Does the trace

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network layer questions

Hi Wenjie, thank you for reaching out! Please find my answers below. Best, Jinsun Does the trace

1/28/25

Jit Gupta, Yoo, Jinsun4

1/17/25

AstraSim Queries

Hi Jit, let me inspect this issue & get back to you, ETA end of weekend. In the meantime, could

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AstraSim Queries

Hi Jit, let me inspect this issue & get back to you, ETA end of weekend. In the meantime, could

1/17/25

人工智能一班-谢晓岚, Yoo, Jinsun2

1/15/25

Chakra Module Missing Issue

Hello, and apologies for the late reply. It seems your image has been lost in the email. Could you

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Chakra Module Missing Issue

Hello, and apologies for the late reply. It seems your image has been lost in the email. Could you

1/15/25

Weintraub, Erez, Yoo, Jinsun2

1/15/25

Astra-sim inputs directory missing?

From: Yoo, Jinsun <jin...@gatech.edu> Sent: Wednesday, January 15, 2025 4:41 PM To: Weintraub,

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Astra-sim inputs directory missing?

From: Yoo, Jinsun <jin...@gatech.edu> Sent: Wednesday, January 15, 2025 4:41 PM To: Weintraub,

1/15/25

Mohammad Khoddam

1/8/25

Clarification on Timeline Visualizer

Dear Astrasim Team, I hope this message finds you well. I work on a project with a dependency on

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Clarification on Timeline Visualizer

Dear Astrasim Team, I hope this message finds you well. I work on a project with a dependency on

1/8/25

12/17/24

Assistance with Installing ASTRA-sim on Snellius Supercomputer without Root Access

Dear all, I hope this message finds you well. I am trying to install and run ASTRA-sim on the

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Assistance with Installing ASTRA-sim on Snellius Supercomputer without Root Access

Dear all, I hope this message finds you well. I am trying to install and run ASTRA-sim on the

12/17/24

jinyuze...@gmail.com

12/17/24

Possibility of running multi-tenant tasks simulation

Hi all, Currently, the examples we have are all about running one-single training task in the system.

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Possibility of running multi-tenant tasks simulation

Hi all, Currently, the examples we have are all about running one-single training task in the system.

12/17/24

Won, William Jonghoon

12/10/24

MICRO 2024 Tutorial Slides/Recordings Available

Hi ASTRA-sim and Chakra users, The slides and recordings for the MICRO 2024 ASTRA-sim/Chakra tutorial

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MICRO 2024 Tutorial Slides/Recordings Available

Hi ASTRA-sim and Chakra users, The slides and recordings for the MICRO 2024 ASTRA-sim/Chakra tutorial

12/10/24

Gaurab Das, Eric Norige3

11/29/24

ASTRA-sim: Example input files?

Gaurab, I'm not an expert, but it looks like astra-sim workloads are currently generated via

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ASTRA-sim: Example input files?

Gaurab, I'm not an expert, but it looks like astra-sim workloads are currently generated via

11/29/24

11/29/24

The problem about et_convert

Dear Astra-sim Team, I hope this email finds you well. My name is Jiaheng Xiong, and I am a

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The problem about et_convert

Dear Astra-sim Team, I hope this email finds you well. My name is Jiaheng Xiong, and I am a

11/29/24

Mohammad Nasser, Won, William Jonghoon2

11/26/24

Assistance with Chakra Module Setup for Astra-sim

Hi Mohammad, Thanks so much for reaching out to the mailing list. First, note that the wiki is

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Assistance with Chakra Module Setup for Astra-sim

Hi Mohammad, Thanks so much for reaching out to the mailing list. First, note that the wiki is

11/26/24

11/15/24

Running AstraSim with ns3 issue and question about network statistics for Analytical Network

Hi, My name is Bodhi Saha, and I'm an intern at Juniper Networks working with AstraSim to

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Running AstraSim with ns3 issue and question about network statistics for Analytical Network

Hi, My name is Bodhi Saha, and I'm an intern at Juniper Networks working with AstraSim to

11/15/24

jinyuze...@gmail.com

11/7/24

Initialization Error about missing "et_def"

Hi team, I notice there's an error about missing et_def in current chakra extern. Seems the

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Initialization Error about missing "et_def"

Hi team, I notice there's an error about missing et_def in current chakra extern. Seems the

11/7/24

Thomas Dyar, Man, Changhai3

11/6/24

ChakraImpl.cc Question

Hi, Please go to the extern/graph_frontend/chakra, and run python/python3 -m pip install . to install

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ChakraImpl.cc Question

Hi, Please go to the extern/graph_frontend/chakra, and run python/python3 -m pip install . to install

11/6/24

11/4/24

Question about how STG determines the collective communication type

Hello, I've been reading through the STG code and have some confusion and questions about the

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Question about how STG determines the collective communication type

Hello, I've been reading through the STG code and have some confusion and questions about the

11/4/24

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