openstreetmap / openstreetmap/mod_tile

get_load_avg is invalid

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#160 2 comments 1 reaction 0 assignees View on GitHub

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Dominant language
C++
Stars
318
Forks
199
PR merge metrics
No merged PRs in 30d

Description

This issue is related to question.

get_load_avg on linux:

FILE *loadavg = fopen("/proc/loadavg", "r");
fscanf(loadavg, "%lf", &avg);
return avg;

Renderer will sleep because he used a lot of cpu time by itself. This is funny, please fix it.

Thank you.

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Search the codebase for the get_load_avg entry point and read its callers in the renderer. Reproduce or inspect the Linux load-average behavior described in the issue, then verify that renderer throttling does not sleep because of CPU time consumed by the renderer itself.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp, linux
Domain
backend, performance
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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