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One Hat Cyber Team
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216.73.216.144
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157.245.143.252
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Linux www 6.11.0-9-generic #9-Ubuntu SMP PREEMPT_DYNAMIC Mon Oct 14 13:19:59 UTC 2024 x86_64
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biolatency.bt
#!/usr/bin/env bpftrace /* * biolatency.bt Block I/O latency as a histogram. * For Linux, uses bpftrace, eBPF. * * This is a bpftrace version of the bcc tool of the same name. * * Copyright 2018 Netflix, Inc. * Licensed under the Apache License, Version 2.0 (the "License") * * 13-Sep-2018 Brendan Gregg Created this. */ BEGIN { printf("Tracing block device I/O... Hit Ctrl-C to end.\n"); } tracepoint:block:block_bio_queue { @start[args.sector] = nsecs; } tracepoint:block:block_rq_complete, tracepoint:block:block_bio_complete /@start[args.sector]/ { @usecs = hist((nsecs - @start[args.sector]) / 1000); delete(@start[args.sector]); } END { clear(@start); }