kaldi-asr/kaldi

Update single job scripts like utils/data/get_utt2dur.sh, steps/compute_cmvn_stats.sh to use multiple jobs

Open

#984 opened on Aug 20, 2016

View on GitHub
 (6 comments) (0 reactions) (0 assignees)Shell (15,392 stars) (5,359 forks)batch import
enhancementhelp wantedstale

Description

In the large data recipes in Kaldi many single job scripts in steps/* and utils/*, which were very fast for normal sized LVCSR tasks, consume several hours. e.g. on fisher_swbd/aspire the utils/data/get_utt2dur.sh script runs for a few hours.

We need to update these scripts to add parallelization support.

Required skill: shell scripting

Contributor guide

Tech stack
shell
Domain
dataperformance
Issue type
performance
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
shell scriptingparallelization experience
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
45
Research direction
First, examine existing single job scripts like utils/data/get utt2dur.sh and steps/compute cmvn stats.sh to understand their current structure. Then, look at how Kaldi already implements parallel jobs in other scripts (e.g., using utils/run.pl or utils/parallel.pl). The goal is to modify these scripts to split work across multiple jobs while maintaining correctness. Finally, test with large datasets to verify performance improvement and ensure no regression. Since the issue is from 2016, check if any partial work exists in the repository or related forks.