feature: supported to measure the distribution of the VFS read/write … #36
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agentzh
requested changes
Feb 26, 2018
samples/disk-io-blocking-vfs.sxx
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| probe vfs.read*.return, vfs.write*.return | ||
| { | ||
| if (sprintf("%d", pid()) =~ "^($^target)$" && begin[pid()] > 0) { |
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This is slow: see how we do this in the ngx-req-distr tool.
stap++
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| $StdVars{pid_ok} = gen_pid_test_condition(\@pids); | ||
| $StdVars{target} = "@pids"; | ||
| $StdVars{target} = join "|", @pids; |
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@agentzh all fixed, please take a look when you have time ^_^ |
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one more thing, I rewrite It supported to monitor the master process and get all the metric of worker process, and supported |
agentzh
requested changes
Mar 13, 2018
README.markdown
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| [Back to TOC](#table-of-contents) | ||
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| disk-io-blocking-vfs |
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The tool name is too verbose. vfs means virtual file system, which already implies disk I/O. Also, you are actually testing file IO instead of disk IO since there is no way to know if it indeed touches the disk device on the VFS level.
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…latency.
todo:
samples/disk-io-blocking-vfs.sxx