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This article introduces the example analysis of Perf supporting Zstd compression tracking records, the content is very detailed, interested friends can refer to, hope to be helpful to you.

Later updates to the perf subsystem of the Linux kernel introduce support for tracking compressed records, which can reduce file size by three to five times.

Later updates to the perf subsystem of the Linux kernel introduce support for tracking compressed records, which can reduce file size by three to five times.

In the context of the Perf subsystem, runtime trace compression and automatic decompression are actually a very useful feature, and if events are logged in any actual length of time, those records can easily reach many GB.

Especially on larger systems, this Zstd compression record is very valuable: "Save more storage space."

Server systems where the perf.data size can easily reach dozens or even hundreds of GiB, especially when parsing and tracing context switching using DWARF-based stacks.

Use the-z switch to activate compression and also support the-- compression_level= flag. The stream compression of this perf ring buffer is sent through the perf tool update and marked "RFC" because it is late, so we are still waiting for Linus Torvalds to decide whether to introduce this support into the Linux 5.2 kernel or we will have to wait for Linux 5.3.

This is the end of the sample analysis of Perf's support for Zstd compression of tracking records. I hope the above content can be of some help and learn more knowledge. If you think the article is good, you can share it for more people to see.

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