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Diffstat (limited to 'testsuite/systemtap.examples/index.txt')
| -rw-r--r-- | testsuite/systemtap.examples/index.txt | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/testsuite/systemtap.examples/index.txt b/testsuite/systemtap.examples/index.txt index fce068b8..fdcd3b31 100644 --- a/testsuite/systemtap.examples/index.txt +++ b/testsuite/systemtap.examples/index.txt @@ -27,6 +27,16 @@ keywords: trace callgraph the trigger. +interrupt/scf.stp - Tally Backtraces for Inter-Processor Interrupt (IPI) +keywords: interrupt backtrace + + The Linux kernel function smp_call_function causes expensive + inter-processor interrupts (IPIs). The scf.stp script tallies the + processes and backtraces causing the interprocessor interrupts to + identify the cause of the expensive IPI. On exit the script prints + the tallies in descending frequency. + + io/disktop.stp - Summarize Disk Read/Write Traffic keywords: disk @@ -42,6 +52,17 @@ keywords: io backtrace list from most common to least common backtrace. +io/iostats.stp - List Executables Reading and Writing the Most Data +keywords: io profiling + + The iostat.stp script measures the amount of data successfully read + and written by all the executables on the system. The output is + sorted from most greatest sum of bytes read and written by an + executable to the least. The output contains the count of operations + (opens, reads, and writes), the totals and averages for the number of + bytes read and written. + + io/iotime.stp - Trace Time Spent in Read and Write for Files keywords: syscall read write time io @@ -79,6 +100,29 @@ keywords: io to the specified device occur. +memory/kmalloc-top - Show Paths to Kernel Malloc (kmalloc) Invocations +keywords: memory + + The kmalloc-top perl program runs a small systemtap script to collect + stack traces for each call to the kmalloc function and counts the + time that each stack trace is observed. When kmalloc-top exits it + prints out sorted list. The output can be be filtered to print only + only the first stack traces (-t) stack traces with more a minimum + counts (-m), or exclude certain stack traces (-e). + + +memory/pfaults.stp - Generate Log of Major and Minor Page Faults +keywords: memory + + The pfaults.stp script generates a simple log for each major and + minor page fault that occurs on the system. Each line contains a + timestamp (in microseconds) when the page fault servicing was + completed, the pid of the process, the address of the page fault, the + type of access (read or write), the type of fault (major or minor), + and the elapsed time for page fault. This log can be examined to + determine where the page faults are occuring. + + network/nettop.stp - Periodic Listing of Processes Using Network Interfaces keywords: network traffic per-process @@ -99,6 +143,16 @@ keywords: network socket element of the line is the function name. +network/tcp_connections.stp - Track Creation of Incoming TCP Connections +keywords: network tcp socket + + The tcp_connections.stp script prints information for each new + incoming TCP connection accepted by the computer. The information + includes the UID, the command accepting the connection, the PID of + the command, the port the connection is on, and the IP address of the + originator of the request. + + process/futexes.stp - System-Wide Futex Contention keywords: syscall locking futex @@ -211,3 +265,23 @@ keywords: profiling user-space and kernel-space. +profiling/timeout.stp - Show Processes Doing Polling Operations +keywords: profiling + + The timeout.stp script is based on a blog entry + (http://udrepper.livejournal.com/19041.html) mentioning a need for a + tool to help developers find applications that are polling. The + timeout.stp script monitors systemcall used for polling and records + the systemcalls that timed out rather than returned because some + action occurred. The script updates the screen once a second with the + top twenty processes. + + +profiling/topsys.stp - Show Processes Doing Polling Operations +keywords: profiling + + The topsys.stp script lists out the top twenty systemcalls for the + previous 5 seconds. The output is sorted from most frequent to least + frequent. + + |