Index Symbols USDcount sample usage local variables, Tracking I/O Time For Each File Read or Write USDreturn sample usage local variables, Summarizing Disk Read/Write Traffic , Track Cumulative IO @avg (integer extractor) computing for statistical aggregates array operations, Computing for Statistical Aggregates @count (integer extractor) computing for statistical aggregates array operations, Computing for Statistical Aggregates @max (integer extractor) computing for statistical aggregates array operations, Computing for Statistical Aggregates @min (integer extractor) computing for statistical aggregates array operations, Computing for Statistical Aggregates @sum (integer extractor) computing for statistical aggregates array operations, Computing for Statistical Aggregates A adding values to statistical aggregates computing for statistical aggregates array operations, Computing for Statistical Aggregates advantages of cross-instrumentation, Generating Instrumentation for Other Computers aggregate element not found runtime errors/warnings understanding SystemTap errors, Run Time Errors and Warnings aggregates (statistical) array operations, Computing for Statistical Aggregates aggregation overflow runtime errors/warnings understanding SystemTap errors, Run Time Errors and Warnings algebraic formulas using arrays reading values from arrays array operations, Reading Values From Arrays architecture notation, determining, Installing Required Kernel Information Packages architecture of SystemTap, Architecture array locals not supported parse/semantics error understanding SystemTap errors, Parse and Semantic Errors array operations assigning associated values, Assigning an Associated Value associating timestamps to process names, Assigning an Associated Value associative arrays, Array Operations in SystemTap clearing arrays/array elements, Clearing/Deleting Arrays and Array Elements delete operator, Clearing/Deleting Arrays and Array Elements multiple array operations within the same probe, Clearing/Deleting Arrays and Array Elements virtual file system reads (non-cumulative), tallying, Clearing/Deleting Arrays and Array Elements computing for statistical aggregates, Computing for Statistical Aggregates @avg (integer extractor), Computing for Statistical Aggregates @count (integer extractor), Computing for Statistical Aggregates @max (integer extractor), Computing for Statistical Aggregates @min (integer extractor), Computing for Statistical Aggregates @sum (integer extractor), Computing for Statistical Aggregates adding values to statistical aggregates, Computing for Statistical Aggregates count (operator), Computing for Statistical Aggregates extracting data collected by statistical aggregates, Computing for Statistical Aggregates conditional statements, using arrays in, Using Arrays in Conditional Statements testing for array membership, Using Arrays in Conditional Statements deleting arrays and array elements, Clearing/Deleting Arrays and Array Elements incrementing associated values, Incrementing Associated Values tallying virtual file system reads (VFS reads), Incrementing Associated Values multiple elements in an array, Processing Multiple Elements in an Array processing multiple elements in an array, Processing Multiple Elements in an Array cumulative virtual file system reads, tallying, Processing Multiple Elements in an Array foreach, Processing Multiple Elements in an Array iterations, processing elements in an array as, Processing Multiple Elements in an Array limiting the output of foreach, Processing Multiple Elements in an Array ordering the output of foreach, Processing Multiple Elements in an Array reading values from arrays, Reading Values From Arrays computing for timestamp deltas, Reading Values From Arrays empty unique keys, Reading Values From Arrays using arrays in simple computations, Reading Values From Arrays arrays, Associative Arrays (see also associative arrays) assigning associated values array operations, Assigning an Associated Value associating timestamps to process names, Assigning an Associated Value associating timestamps to process names array operations, Assigning an Associated Value associated values introduction arrays, Associative Arrays associating timestamps to process names assigning associated values array operations, Assigning an Associated Value associative arrays introduction, Associative Arrays associated values, Associative Arrays example, Associative Arrays index expression, Associative Arrays key pairs, Associative Arrays syntax, Associative Arrays unique keys, Associative Arrays asynchronous events Events, Event B begin Events, Event building instrumentation modules from SystemTap scripts, Generating Instrumentation for Other Computers building kernel modules from SystemTap scripts, Generating Instrumentation for Other Computers C call graph tracing examples of SystemTap scripts, Call Graph Tracing capabilities of SystemTap Introduction, SystemTap Capabilities changes to file attributes, monitoring examples of SystemTap scripts, Monitoring Changes to File Attributes clearing arrays/array elements array operations, Clearing/Deleting Arrays and Array Elements delete operator, Clearing/Deleting Arrays and Array Elements multiple array operations within the same probe, Clearing/Deleting Arrays and Array Elements virtual file system reads (non-cumulative), tallying, Clearing/Deleting Arrays and Array Elements command-line arguments SystemTap handler constructs handlers, Command-Line Arguments compiling instrumentation/kernel modules from SystemTap scripts, Generating Instrumentation for Other Computers components SystemTap scripts introduction, SystemTap Scripts computing for statistical aggregates array operations, Computing for Statistical Aggregates @avg (integer extractor), Computing for Statistical Aggregates @count (integer extractor), Computing for Statistical Aggregates @max (integer extractor), Computing for Statistical Aggregates @min (integer extractor), Computing for Statistical Aggregates @sum (integer extractor), Computing for Statistical Aggregates adding values to statistical aggregates, Computing for Statistical Aggregates count (operator), Computing for Statistical Aggregates extracting data collected by statistical aggregates, Computing for Statistical Aggregates computing for timestamp deltas reading values from arrays array operations, Reading Values From Arrays conditional operators conditional statements handlers, Conditional Statements conditional statements, using arrays in array operations, Using Arrays in Conditional Statements testing for array membership, Using Arrays in Conditional Statements CONFIG_HZ, computing for, Variables contended user-space locks (futex contentions), identifying examples of SystemTap scripts, Identifying Contended User-Space Locks copy fault runtime errors/warnings understanding SystemTap errors, Run Time Errors and Warnings count operator computing for statistical aggregates array (operator), Computing for Statistical Aggregates counting function calls examples of SystemTap scripts, Counting Function Calls Made CPU ticks examples of SystemTap scripts, Determining Time Spent in Kernel and User Space cpu() functions, Systemtap Handler/Body cross-compiling, Generating Instrumentation for Other Computers cross-instrumentation advantages of, Generating Instrumentation for Other Computers building kernel modules from SystemTap scripts, Generating Instrumentation for Other Computers configuration host system and target system, Generating Instrumentation for Other Computers generating instrumentation from SystemTap scripts, Generating Instrumentation for Other Computers host system, Generating Instrumentation for Other Computers instrumentation module, Generating Instrumentation for Other Computers target kernel, Generating Instrumentation for Other Computers target system, Generating Instrumentation for Other Computers ctime() functions, Systemtap Handler/Body ctime(), example of usage script examples, Summarizing Disk Read/Write Traffic cumulative I/O, tracking examples of SystemTap scripts, Track Cumulative IO cumulative virtual file system reads, tallying processing multiple elements in an array array operations, Processing Multiple Elements in an Array D delete operator clearing arrays/array elements array operations, Clearing/Deleting Arrays and Array Elements determining architecture notation, Installing Required Kernel Information Packages determining the kernel version, Installing Required Kernel Information Packages determining time spent in kernel and user space examples of SystemTap scripts, Determining Time Spent in Kernel and User Space device I/O, monitoring examples of SystemTap scripts, I/O Monitoring (By Device) device number of a file (integer format) examples of SystemTap scripts, Monitoring Reads and Writes to a File disk I/O traffic, summarizing script examples, Summarizing Disk Read/Write Traffic division by 0 runtime errors/warnings understanding SystemTap errors, Run Time Errors and Warnings documentation goals Introduction, Documentation Goals E embedded code in unprivileged script parse/semantics error understanding SystemTap errors, Parse and Semantic Errors empty unique keys reading values from arrays array operations, Reading Values From Arrays end Events, Event errors parse/semantics error, Parse and Semantic Errors embedded code in unprivileged script, Parse and Semantic Errors expected symbol/array index expression, Parse and Semantic Errors grammatical/typographical script error, Parse and Semantic Errors guru mode, Parse and Semantic Errors invalid values to variables/arrays, Parse and Semantic Errors libdwfl failure, Parse and Semantic Errors no match for probe point, Parse and Semantic Errors non-global arrays, Parse and Semantic Errors probe mismatch, Parse and Semantic Errors type mismatch for identifier, Parse and Semantic Errors unresolved function call, Parse and Semantic Errors unresolved target-symbol expression, Parse and Semantic Errors unresolved type for identifier, Parse and Semantic Errors variable modified during 'foreach', Parse and Semantic Errors runtime errors/warnings, Run Time Errors and Warnings aggregate element not found, Run Time Errors and Warnings aggregation overflow, Run Time Errors and Warnings copy fault, Run Time Errors and Warnings division by 0, Run Time Errors and Warnings MAXACTION exceeded, Run Time Errors and Warnings MAXNESTING exceeded, Run Time Errors and Warnings number of errors: N, skipped probes: M, Run Time Errors and Warnings pointer dereference fault, Run Time Errors and Warnings event types Understanding How SystemTap Works, Understanding How SystemTap Works Events asynchronous events, Event begin, Event end, Event examples of synchronous and asynchronous events, Event introduction, Event kernel.function("function"), Event kernel.trace("tracepoint"), Event module("module"), Event synchronous events, Event syscall.system_call, Event timer events, Event vfs.file_operation, Event wildcards, Event events and handlers, Understanding How SystemTap Works events wildcards, Event example introduction arrays, Associative Arrays example of multiple command-line arguments examples of SystemTap scripts, Call Graph Tracing examples of synchronous and asynchronous events Events, Event examples of SystemTap scripts, Useful SystemTap Scripts call graph tracing, Call Graph Tracing CPU ticks, Determining Time Spent in Kernel and User Space ctime(), example of usage, Summarizing Disk Read/Write Traffic determining time spent in kernel and user space, Determining Time Spent in Kernel and User Space file device number (integer format), Monitoring Reads and Writes to a File futex system call, Identifying Contended User-Space Locks identifying contended user-space locks (futex contentions), Identifying Contended User-Space Locks if/else conditionals, alternative syntax, Network Profiling inode number, Monitoring Reads and Writes to a File monitoring changes to file attributes, Monitoring Changes to File Attributes monitoring device I/O, I/O Monitoring (By Device) monitoring I/O time, Tracking I/O Time For Each File Read or Write monitoring incoming TCP connections, Monitoring Incoming TCP Connections monitoring polling applications, Monitoring Polling Applications monitoring reads and writes to a file, Monitoring Reads and Writes to a File monitoring system calls, Tracking Most Frequently Used System Calls monitoring system calls (volume per process), Tracking System Call Volume Per Process multiple command-line arguments, example of, Call Graph Tracing net/socket.c, tracing functions from, Tracing Functions Called in Network Socket Code network profiling, Network Profiling , Monitoring Network Packets Drops in Kernel process deadlocks (arising from futex contentions), Identifying Contended User-Space Locks stat -c, determining file device number (integer format), Monitoring Reads and Writes to a File stat -c, determining whole device number, I/O Monitoring (By Device) summarizing disk I/O traffic, Summarizing Disk Read/Write Traffic tallying function calls, Counting Function Calls Made thread_indent(), sample usage, Call Graph Tracing timer.ms(), sample usage, Counting Function Calls Made timer.s(), sample usage, Monitoring Polling Applications , Tracking Most Frequently Used System Calls tracing functions called in network socket code, Tracing Functions Called in Network Socket Code tracking cumulative I/O, Track Cumulative IO trigger function, Call Graph Tracing usrdev2kerndev(), I/O Monitoring (By Device) whole device number (usage as a command-line argument), I/O Monitoring (By Device) exceeded MAXACTION runtime errors/warnings understanding SystemTap errors, Run Time Errors and Warnings exceeded MAXNESTING runtime errors/warnings understanding SystemTap errors, Run Time Errors and Warnings exit() functions, Systemtap Handler/Body expected symbol/array index expression parse/semantics error understanding SystemTap errors, Parse and Semantic Errors extracting data collected by statistical aggregates computing for statistical aggregates array operations, Computing for Statistical Aggregates F file attributes, monitoring changes to examples of SystemTap scripts, Monitoring Changes to File Attributes file device number (integer format) examples of SystemTap scripts, Monitoring Reads and Writes to a File file reads/writes, monitoring examples of SystemTap scripts, Monitoring Reads and Writes to a File flight recorder mode, SystemTap Flight Recorder Mode file mode, File Flight Recorder in-memory mode, In-memory Flight Recorder for loops conditional statements handlers, Conditional Statements foreach processing multiple elements in an array array operations, Processing Multiple Elements in an Array format introduction arrays, Associative Arrays format and syntax printf(), Systemtap Handler/Body SystemTap handler constructs handlers, Variables SystemTap scripts introduction, SystemTap Scripts format specifiers printf(), Systemtap Handler/Body format strings printf(), Systemtap Handler/Body function call (unresolved) parse/semantics error understanding SystemTap errors, Parse and Semantic Errors function calls (incoming/outgoing), tracing examples of SystemTap scripts, Call Graph Tracing function calls, tallying examples of SystemTap scripts, Counting Function Calls Made functions, Systemtap Handler/Body cpu(), Systemtap Handler/Body ctime(), Systemtap Handler/Body gettimeofday_s(), Systemtap Handler/Body pp(), Systemtap Handler/Body SystemTap scripts introduction, SystemTap Scripts target(), Systemtap Handler/Body thread_indent(), Systemtap Handler/Body tid(), Systemtap Handler/Body uid(), Systemtap Handler/Body functions (used in handlers) exit(), Systemtap Handler/Body functions called in network socket code, tracing examples of SystemTap scripts, Tracing Functions Called in Network Socket Code futex contention, definition examples of SystemTap scripts, Identifying Contended User-Space Locks futex contentions, identifying examples of SystemTap scripts, Identifying Contended User-Space Locks futex system call examples of SystemTap scripts, Identifying Contended User-Space Locks G gettimeofday_s() functions, Systemtap Handler/Body global SystemTap handler constructs handlers, Variables goals, documentation Introduction, Documentation Goals grammatical/typographical script error parse/semantics error understanding SystemTap errors, Parse and Semantic Errors guru mode parse/semantics error understanding SystemTap errors, Parse and Semantic Errors H handler functions, Systemtap Handler/Body handlers conditional statements, Conditional Statements conditional operators, Conditional Statements for loops, Conditional Statements if/else, Conditional Statements while loops, Conditional Statements introduction, Systemtap Handler/Body SystemTap handler constructs, Basic SystemTap Handler Constructs command-line arguments, Command-Line Arguments global, Variables syntax and format, Basic SystemTap Handler Constructs variables, Variables handlers and events, Understanding How SystemTap Works SystemTap scripts introduction, SystemTap Scripts heaviest disk reads/writes, identifying script examples, Summarizing Disk Read/Write Traffic host system cross-instrumentation, Generating Instrumentation for Other Computers host system and target system cross-instrumentation configuration, Generating Instrumentation for Other Computers I I/O monitoring (by device) examples of SystemTap scripts, I/O Monitoring (By Device) I/O time, monitoring examples of SystemTap scripts, Tracking I/O Time For Each File Read or Write I/O traffic, summarizing script examples, Summarizing Disk Read/Write Traffic identifier type mismatch parse/semantics error understanding SystemTap errors, Parse and Semantic Errors identifying contended user-space locks (futex contentions) examples of SystemTap scripts, Identifying Contended User-Space Locks identifying heaviest disk reads/writes script examples, Summarizing Disk Read/Write Traffic if/else conditional statements handlers, Conditional Statements if/else conditionals, alternative syntax examples of SystemTap scripts, Network Profiling if/else statements, using arrays in array operations, Using Arrays in Conditional Statements incoming TCP connections, monitoring examples of SystemTap scripts, Monitoring Incoming TCP Connections incoming/outgoing function calls, tracing examples of SystemTap scripts, Call Graph Tracing incrementing associated values array operations, Incrementing Associated Values tallying virtual file system reads (VFS reads), Incrementing Associated Values index expression introduction arrays, Associative Arrays initial testing, Initial Testing inode number examples of SystemTap scripts, Monitoring Reads and Writes to a File Installation initial testing, Initial Testing kernel information packages, Installing Required Kernel Information Packages kernel version, determining the, Installing Required Kernel Information Packages required packages, Installing Required Kernel Information Packages Setup and Installation, Installation and Setup systemtap package, Installing SystemTap systemtap-runtime package, Installing SystemTap instrumentation module cross-instrumentation, Generating Instrumentation for Other Computers instrumentation modules from SystemTap scripts, building, Generating Instrumentation for Other Computers integer extractors computing for statistical aggregates array operations, Computing for Statistical Aggregates Introduction capabilities of SystemTap, SystemTap Capabilities documentation goals, Documentation Goals goals, documentation, Documentation Goals performance monitoring, Introduction invalid division runtime errors/warnings understanding SystemTap errors, Run Time Errors and Warnings invalid values to variables/arrays parse/semantics error understanding SystemTap errors, Parse and Semantic Errors iterations, processing elements in an array as processing multiple elements in an array array operations, Processing Multiple Elements in an Array K kernel and user space, determining time spent in examples of SystemTap scripts, Determining Time Spent in Kernel and User Space kernel information packages, Installing Required Kernel Information Packages kernel modules from SystemTap scripts, building, Generating Instrumentation for Other Computers kernel version, determining the, Installing Required Kernel Information Packages kernel.function("function") Events, Event kernel.trace("tracepoint") Events, Event key pairs introduction arrays, Associative Arrays L libdwfl failure parse/semantics error understanding SystemTap errors, Parse and Semantic Errors limiting the output of foreach processing multiple elements in an array array operations, Processing Multiple Elements in an Array local variables name, Systemtap Handler/Body sample usage USDcount, Tracking I/O Time For Each File Read or Write USDreturn, Summarizing Disk Read/Write Traffic , Track Cumulative IO M MAXACTION exceeded runtime errors/warnings understanding SystemTap errors, Run Time Errors and Warnings MAXNESTING exceeded runtime errors/warnings understanding SystemTap errors, Run Time Errors and Warnings membership (in array), testing for conditional statements, using arrays in array operations, Using Arrays in Conditional Statements module("module") Events, Event monitoring changes to file attributes examples of SystemTap scripts, Monitoring Changes to File Attributes monitoring cumulative I/O examples of SystemTap scripts, Track Cumulative IO monitoring device I/O examples of SystemTap scripts, I/O Monitoring (By Device) monitoring I/O time examples of SystemTap scripts, Tracking I/O Time For Each File Read or Write monitoring incoming TCP connections examples of SystemTap scripts, Monitoring Incoming TCP Connections monitoring polling applications examples of SystemTap scripts, Monitoring Polling Applications monitoring reads and writes to a file examples of SystemTap scripts, Monitoring Reads and Writes to a File monitoring system calls examples of SystemTap scripts, Tracking Most Frequently Used System Calls monitoring system calls (volume per process) examples of SystemTap scripts, Tracking System Call Volume Per Process multiple array operations within the same probe clearing arrays/array elements array operations, Clearing/Deleting Arrays and Array Elements multiple command-line arguments, example of examples of SystemTap scripts, Call Graph Tracing multiple elements in an array array operations, Processing Multiple Elements in an Array N name local variables, Systemtap Handler/Body net/socket.c, tracing functions from examples of SystemTap scripts, Tracing Functions Called in Network Socket Code network profiling examples of SystemTap scripts, Network Profiling , Monitoring Network Packets Drops in Kernel network socket code, tracing functions called in examples of SystemTap scripts, Tracing Functions Called in Network Socket Code network traffic, monitoring examples of SystemTap scripts, Network Profiling , Monitoring Network Packets Drops in Kernel no match for probe point parse/semantics error understanding SystemTap errors, Parse and Semantic Errors non-global arrays parse/semantics error understanding SystemTap errors, Parse and Semantic Errors number of errors: N, skipped probes: M runtime errors/warnings understanding SystemTap errors, Run Time Errors and Warnings O operations assigning associated values associating timestamps to process names, Assigning an Associated Value associative arrays, Array Operations in SystemTap clearing arrays/array elements, Clearing/Deleting Arrays and Array Elements delete operator, Clearing/Deleting Arrays and Array Elements multiple array operations within the same probe, Clearing/Deleting Arrays and Array Elements virtual file system reads (non-cumulative), tallying, Clearing/Deleting Arrays and Array Elements computing for statistical aggregates, Computing for Statistical Aggregates @avg (integer extractor), Computing for Statistical Aggregates @count (integer extractor), Computing for Statistical Aggregates @max (integer extractor), Computing for Statistical Aggregates @min (integer extractor), Computing for Statistical Aggregates @sum (integer extractor), Computing for Statistical Aggregates adding values to statistical aggregates, Computing for Statistical Aggregates count (operator), Computing for Statistical Aggregates extracting data collected by statistical aggregates, Computing for Statistical Aggregates conditional statements, using arrays in, Using Arrays in Conditional Statements testing for array membership, Using Arrays in Conditional Statements deleting arrays and array elements, Clearing/Deleting Arrays and Array Elements incrementing associated values, Incrementing Associated Values tallying virtual file system reads (VFS reads), Incrementing Associated Values multiple elements in an array, Processing Multiple Elements in an Array processing multiple elements in an array, Processing Multiple Elements in an Array cumulative virtual file system reads, tallying, Processing Multiple Elements in an Array foreach, Processing Multiple Elements in an Array iterations, processing elements in an array as, Processing Multiple Elements in an Array limiting the output of foreach, Processing Multiple Elements in an Array ordering the output of foreach, Processing Multiple Elements in an Array reading values from arrays, Reading Values From Arrays computing for timestamp deltas, Reading Values From Arrays empty unique keys, Reading Values From Arrays using arrays in simple computations, Reading Values From Arrays options, stap Usage, Running SystemTap Scripts ordering the output of foreach processing multiple elements in an array array operations, Processing Multiple Elements in an Array overflow of aggregation runtime errors/warnings understanding SystemTap errors, Run Time Errors and Warnings P packages required to run SystemTap, Installing Required Kernel Information Packages parse/semantics error understanding SystemTap errors, Parse and Semantic Errors embedded code in unprivileged script, Parse and Semantic Errors expected symbol/array index expression, Parse and Semantic Errors grammatical/typographical script error, Parse and Semantic Errors guru mode, Parse and Semantic Errors invalid values to variables/arrays, Parse and Semantic Errors libdwfl failure, Parse and Semantic Errors no match for probe point, Parse and Semantic Errors non-global arrays, Parse and Semantic Errors probe mismatch, Parse and Semantic Errors type mismatch for identifier, Parse and Semantic Errors unresolved function call, Parse and Semantic Errors unresolved target-symbol expression, Parse and Semantic Errors unresolved type for identifier, Parse and Semantic Errors variable modified during 'foreach', Parse and Semantic Errors performance monitoring Introduction, Introduction pointer dereference fault runtime errors/warnings understanding SystemTap errors, Run Time Errors and Warnings polling applications, monitoring examples of SystemTap scripts, Monitoring Polling Applications pp() functions, Systemtap Handler/Body printf() format specifiers, Systemtap Handler/Body format strings, Systemtap Handler/Body syntax and format, Systemtap Handler/Body printing I/O activity (cumulative) examples of SystemTap scripts, Track Cumulative IO probe mismatch parse/semantics error understanding SystemTap errors, Parse and Semantic Errors probe point (no match for) parse/semantics error understanding SystemTap errors, Parse and Semantic Errors probes SystemTap scripts introduction, SystemTap Scripts process deadlocks (arising from futex contentions) examples of SystemTap scripts, Identifying Contended User-Space Locks processing multiple elements in an array array operations, Processing Multiple Elements in an Array cumulative virtual file system reads, tallying array operations, Processing Multiple Elements in an Array foreach array operations, Processing Multiple Elements in an Array limiting the output of foreach array operations, Processing Multiple Elements in an Array ordering the output of foreach array operations, Processing Multiple Elements in an Array profiling the network examples of SystemTap scripts, Network Profiling , Monitoring Network Packets Drops in Kernel R reading values from arrays array operations, Reading Values From Arrays empty unique keys, Reading Values From Arrays using arrays in simple computations, Reading Values From Arrays computing for timestamp deltas array operations, Reading Values From Arrays reads/writes to a file, monitoring examples of SystemTap scripts, Monitoring Reads and Writes to a File required packages, Installing Required Kernel Information Packages RPMs required to run SystemTap, Installing Required Kernel Information Packages running scripts from standard input, Running SystemTap Scripts running SystemTap scripts Usage, Running SystemTap Scripts runtime errors/warnings understanding SystemTap errors, Run Time Errors and Warnings aggregate element not found, Run Time Errors and Warnings aggregation overflow, Run Time Errors and Warnings copy fault, Run Time Errors and Warnings division by 0, Run Time Errors and Warnings MAXACTION exceeded, Run Time Errors and Warnings MAXNESTING exceeded, Run Time Errors and Warnings number of errors: N, skipped probes: M, Run Time Errors and Warnings pointer dereference fault, Run Time Errors and Warnings S script examples call graph tracing, Call Graph Tracing CPU ticks, Determining Time Spent in Kernel and User Space ctime(), example of usage, Summarizing Disk Read/Write Traffic determining time spent in kernel and user space, Determining Time Spent in Kernel and User Space file device number (integer format), Monitoring Reads and Writes to a File futex system call, Identifying Contended User-Space Locks identifying contended user-space locks (futex contentions), Identifying Contended User-Space Locks if/else conditionals, alternative syntax, Network Profiling inode number, Monitoring Reads and Writes to a File monitoring changes to file attributes, Monitoring Changes to File Attributes monitoring device I/O, I/O Monitoring (By Device) monitoring I/O time, Tracking I/O Time For Each File Read or Write monitoring incoming TCP connections, Monitoring Incoming TCP Connections monitoring polling applications, Monitoring Polling Applications monitoring reads and writes to a file, Monitoring Reads and Writes to a File monitoring system calls, Tracking Most Frequently Used System Calls monitoring system calls (volume per process), Tracking System Call Volume Per Process multiple command-line arguments, example of, Call Graph Tracing net/socket.c, tracing functions from, Tracing Functions Called in Network Socket Code network profiling, Network Profiling , Monitoring Network Packets Drops in Kernel process deadlocks (arising from futex contentions), Identifying Contended User-Space Locks stat -c, determining file device number (integer format), Monitoring Reads and Writes to a File stat -c, determining whole device number, I/O Monitoring (By Device) summarizing disk I/O traffic, Summarizing Disk Read/Write Traffic tallying function calls, Counting Function Calls Made thread_indent(), sample usage, Call Graph Tracing timer.ms(), sample usage, Counting Function Calls Made timer.s(), sample usage, Monitoring Polling Applications , Tracking Most Frequently Used System Calls tracing functions called in network socket code, Tracing Functions Called in Network Socket Code tracking cumulative I/O, Track Cumulative IO trigger function, Call Graph Tracing usrdev2kerndev(), I/O Monitoring (By Device) whole device number (usage as a command-line argument), I/O Monitoring (By Device) scripts introduction, SystemTap Scripts components, SystemTap Scripts events and handlers, SystemTap Scripts format and syntax, SystemTap Scripts functions, SystemTap Scripts probes, SystemTap Scripts statement blocks, SystemTap Scripts sessions, SystemTap, Architecture Setup and Installation, Installation and Setup standard input, running scripts from Usage, Running SystemTap Scripts stap Usage, Running SystemTap Scripts stap options, Running SystemTap Scripts stapdev Usage, Running SystemTap Scripts staprun Usage, Running SystemTap Scripts stapusr Usage, Running SystemTap Scripts stat -c, determining file device number (integer format) examples of SystemTap scripts, Monitoring Reads and Writes to a File stat -c, determining whole device number examples of SystemTap scripts, I/O Monitoring (By Device) statement blocks SystemTap scripts introduction, SystemTap Scripts statistical aggregates array operations, Computing for Statistical Aggregates summarizing disk I/O traffic script examples, Summarizing Disk Read/Write Traffic synchronous events Events, Event syntax introduction arrays, Associative Arrays syntax and format printf(), Systemtap Handler/Body SystemTap handler constructs handlers, Basic SystemTap Handler Constructs SystemTap scripts introduction, SystemTap Scripts syscall.system_call Events, Event system calls volume (per process), monitoring examples of SystemTap scripts, Tracking System Call Volume Per Process system calls, monitoring examples of SystemTap scripts, Tracking Most Frequently Used System Calls SystemTap architecture, Architecture SystemTap handlers SystemTap handler constructs, Basic SystemTap Handler Constructs syntax and format, Basic SystemTap Handler Constructs systemtap package, Installing SystemTap SystemTap script functions, Systemtap Handler/Body SystemTap scripts introduction, SystemTap Scripts components, SystemTap Scripts events and handlers, SystemTap Scripts format and syntax, SystemTap Scripts functions, SystemTap Scripts probes, SystemTap Scripts statement blocks, SystemTap Scripts useful examples, Useful SystemTap Scripts SystemTap scripts, how to run, Running SystemTap Scripts SystemTap sessions, Architecture SystemTap statements conditional statements, Conditional Statements conditional operators, Conditional Statements for loops, Conditional Statements if/else, Conditional Statements while loops, Conditional Statements SystemTap handler constructs command-line arguments, Command-Line Arguments global, Variables variables, Variables systemtap-runtime package, Installing SystemTap systemtap-testsuite package sample scripts, Useful SystemTap Scripts T tallying function calls examples of SystemTap scripts, Counting Function Calls Made tallying virtual file system reads (VFS reads) incrementing associated values array operations, Incrementing Associated Values Tapsets definition of, Tapsets target kernel cross-instrumentation, Generating Instrumentation for Other Computers target system cross-instrumentation, Generating Instrumentation for Other Computers target system and host system configuration, Generating Instrumentation for Other Computers target() functions, Systemtap Handler/Body target-symbol expression, unresolved parse/semantics error understanding SystemTap errors, Parse and Semantic Errors TCP connections (incoming), monitoring examples of SystemTap scripts, Monitoring Incoming TCP Connections testing for array membership conditional statements, using arrays in array operations, Using Arrays in Conditional Statements testing, initial, Initial Testing thread_indent() functions, Systemtap Handler/Body thread_indent(), sample usage examples of SystemTap scripts, Call Graph Tracing tid() functions, Systemtap Handler/Body time of I/O examples of SystemTap scripts, Tracking I/O Time For Each File Read or Write time spent in kernel/user space, determining examples of SystemTap scripts, Determining Time Spent in Kernel and User Space timer events Events, Event timer.ms(), sample usage examples of SystemTap scripts, Counting Function Calls Made timer.s(), sample usage examples of SystemTap scripts, Monitoring Polling Applications , Tracking Most Frequently Used System Calls timestamp deltas, computing for reading values from arrays array operations, Reading Values From Arrays timestamps, association thereof to process names assigning associated values array operations, Assigning an Associated Value tracepoint, Event , Monitoring Network Packets Drops in Kernel tracing call graph examples of SystemTap scripts, Call Graph Tracing tracing functions called in network socket code examples of SystemTap scripts, Tracing Functions Called in Network Socket Code tracing incoming/outgoing function calls examples of SystemTap scripts, Call Graph Tracing tracking cumulative I/O examples of SystemTap scripts, Track Cumulative IO trigger function examples of SystemTap scripts, Call Graph Tracing type mismatch for identifier parse/semantics error understanding SystemTap errors, Parse and Semantic Errors typographical script error parse/semantics error understanding SystemTap errors, Parse and Semantic Errors U uid() functions, Systemtap Handler/Body uname -m, Installing Required Kernel Information Packages uname -r, Installing Required Kernel Information Packages Understanding How SystemTap Works, Understanding How SystemTap Works architecture, Architecture event types, Understanding How SystemTap Works events and handlers, Understanding How SystemTap Works SystemTap sessions, Architecture understanding SystemTap errors parse/semantics error, Parse and Semantic Errors embedded code in unprivileged script, Parse and Semantic Errors expected symbol/array index expression, Parse and Semantic Errors grammatical/typographical script error, Parse and Semantic Errors guru mode, Parse and Semantic Errors invalid values to variables/arrays, Parse and Semantic Errors libdwfl failure, Parse and Semantic Errors no match for probe point, Parse and Semantic Errors non-global arrays, Parse and Semantic Errors probe mismatch, Parse and Semantic Errors type mismatch for identifier, Parse and Semantic Errors unresolved function call, Parse and Semantic Errors unresolved target-symbol expression, Parse and Semantic Errors unresolved type for identifier, Parse and Semantic Errors variable modified during 'foreach', Parse and Semantic Errors runtime errors/warnings, Run Time Errors and Warnings aggregate element not found, Run Time Errors and Warnings aggregation overflow, Run Time Errors and Warnings copy fault, Run Time Errors and Warnings division by 0, Run Time Errors and Warnings MAXACTION exceeded, Run Time Errors and Warnings MAXNESTING exceeded, Run Time Errors and Warnings number of errors: N, skipped probes: M, Run Time Errors and Warnings pointer dereference fault, Run Time Errors and Warnings unique keys introduction arrays, Associative Arrays unprivileged script, embedded code in parse/semantics error understanding SystemTap errors, Parse and Semantic Errors unresolved function call parse/semantics 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