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Date
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CMakeLists.txt
276
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2023-12-08 15:36
biolatpcts.py
3.23
KB
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biolatpcts_example.txt
650
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bitehist.py
1.36
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bitehist_example.txt
1.18
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dddos.py
3.73
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dddos_example.txt
2.06
KB
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disksnoop.py
1.9
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disksnoop_example.txt
1.55
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hello_fields.py
679
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hello_perf_output.py
1.24
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hello_perf_output_using_ns.py
1.8
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kvm_hypercall.py
1.48
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kvm_hypercall.txt
1.74
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mallocstacks.py
1.9
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mysqld_query.py
1.66
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mysqld_query_example.txt
499
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nflatency.py
6.07
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nodejs_http_server.py
1.34
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nodejs_http_server_example.txt
276
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stack_buildid_example.py
3.03
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stacksnoop.py
3.18
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stacksnoop_example.txt
2.8
KB
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strlen_count.py
1.3
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strlen_hist.py
1.81
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strlen_hist_ifunc.py
3.71
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strlen_snoop.py
1.35
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sync_timing.py
1.36
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task_switch.c
499
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task_switch.py
486
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tcpv4connect.py
2.36
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tcpv4connect_example.txt
1.04
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trace_fields.py
589
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trace_perf_output.py
1.56
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undump.py
3.52
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undump_example.txt
886
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urandomread-explicit.py
1.48
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urandomread.py
1.01
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urandomread_example.txt
675
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vfsreadlat.c
896
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vfsreadlat.py
1.3
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vfsreadlat_example.txt
3.53
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Demonstrations of bitehist.py, the Linux eBPF/bcc version. This prints a power-of-2 histogram to show the block I/O size distribution. A summary is printed after Ctrl-C is hit. # ./bitehist.py Tracing... Hit Ctrl-C to end. ^C kbytes : count distribution 0 -> 1 : 3 | | 2 -> 3 : 0 | | 4 -> 7 : 211 |********** | 8 -> 15 : 0 | | 16 -> 31 : 0 | | 32 -> 63 : 0 | | 64 -> 127 : 1 | | 128 -> 255 : 800 |**************************************| This output shows a bimodal distribution. The largest mod of 800 I/O were between 128 and 255 Kbytes in size, and another mode of 211 I/O were between 4 and 7 Kbytes in size. Understanding this distribution is useful for characterizing workloads and understanding performance. The existence of this distribution is not visible from averages alone.