(command.CommandList children: [ (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:tracing) op: assign_op.Equal rhs: {<'/sys/kernel/debug/tracing'>} spids: [166] ) ] ) (command.CommandList children: [ (command.Sentence child: (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:interval) op: assign_op.Equal rhs: {<1>} spids: [169] ) ] ) terminator: <Id.Op_Semi _> ) (command.Sentence child: (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:opt_timestamp) op: assign_op.Equal rhs: {<0>} spids: [173] ) ] ) terminator: <Id.Op_Semi _> ) (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:opt_debug) op: assign_op.Equal rhs: {<0>} spids: [177] ) ] ) ] ) (C {<trap>} {(SQ <'quit=1'>)} {<INT>} {<QUIT>} {<TERM>} {<PIPE>} {<HUP>}) (command.ShFunction name: usage body: (BraceGroup children: [ (command.Simple words: [{<cat>}] redirects: [ (redir op: <Id.Redir_DLessDash '<<-'> loc: (redir_loc.Fd fd:0) arg: (redir_param.HereDoc here_begin: {<END>} here_end_span_id: 226 stdin_parts: [ <'USAGE: cachestat [-Dht] [interval]\n'> <' -D # print debug counters\n'> <' -h # this usage message\n'> <' -t # include timestamp\n'> <' interval # output interval in secs (default 1)\n'> <' eg,\n'> <' cachestat # show stats every second\n'> <' cachestat 5 # show stats every 5 seconds\n'> <'\n'> <'See the man page and example file for more info.\n'> ] ) ) (redir op:<Id.Redir_GreatAnd '>&'> loc:(redir_loc.Fd fd:1) arg:{<2>}) ] do_fork: T ) (command.ControlFlow token:<Id.ControlFlow_Exit exit>) ] ) ) (command.ShFunction name: warn body: (BraceGroup children: [ (command.If arms: [ (if_arm cond: (condition.Shell commands: [ (command.Sentence child: (command.Pipeline children: [(C {<eval>} {(DQ ($ Id.VSub_At '$@'))})] negated: T ) terminator: <Id.Op_Semi _> ) ] ) action: [ (command.Simple words: [ {<echo>} { (DQ <'WARNING: command failed '> (word_part.EscapedLiteral token: <Id.Lit_EscapedChar '\\"'> ) ($ Id.VSub_At '$@') (word_part.EscapedLiteral token:<Id.Lit_EscapedChar '\\"'>) ) } ] redirects: [(redir op:<Id.Redir_GreatAnd '>&'> loc:(redir_loc.Fd fd:1) arg:{<2>})] do_fork: T ) ] spids: [240 251] ) ] ) ] ) ) (command.ShFunction name: die body: (BraceGroup children: [ (command.Simple words: [{<echo>} {(DQ ($ Id.VSub_At '$@'))}] redirects: [(redir op:<Id.Redir_GreatAnd '>&'> loc:(redir_loc.Fd fd:1) arg:{<2>})] do_fork: T ) (command.ControlFlow token:<Id.ControlFlow_Exit exit> arg_word:{<1>}) ] ) ) (command.WhileUntil keyword: <Id.KW_While while> cond: (condition.Shell commands:[(C {<getopts>} {<Dht>} {<opt>})]) body: (command.DoGroup children: [ (command.Case to_match: {($ Id.VSub_DollarName '$opt')} arms: [ (case_arm pat_list: [{<D>}] action: [ (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:opt_debug) op: assign_op.Equal rhs: {<1>} spids: [320] ) ] ) ] spids: [317 318 323 -1] ) (case_arm pat_list: [{<t>}] action: [ (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:opt_timestamp) op: assign_op.Equal rhs: {<1>} spids: [329] ) ] ) ] spids: [326 327 332 -1] ) (case_arm pat_list: [{<h>} {<Id.Lit_QMark '?'>}] action: [(C {<usage>})] spids: [335 338 342 -1] ) ] ) ] ) ) (C {<shift>} { (word_part.ArithSub anode: (arith_expr.Binary op_id: Id.Arith_Minus left: {($ Id.VSub_DollarName '$OPTIND')} right: {<Id.Lit_Digits 1>} ) ) } ) (command.If arms: [ (if_arm cond: (condition.Shell commands: [ (command.Sentence child: (command.DParen child:{($ Id.VSub_Pound '$#')}) terminator: <Id.Op_Semi _> ) ] ) action: [ (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:interval) op: assign_op.Equal rhs: {($ Id.VSub_Number '$1')} spids: [379] ) ] ) ] spids: [366 376] ) ] ) (C {<echo>} { (DQ <'Counting cache functions... Output every '> ($ Id.VSub_DollarName '$interval') <' seconds.'> ) } ) (command.AndOr ops: [Id.Op_DPipe] children: [ (C {<cd>} {($ Id.VSub_DollarName '$tracing')}) (C {<die>} { (DQ <'ERROR: accessing tracing. Root user? Kernel has FTRACE?\n'> <' debugfs mounted? (mount -t debugfs debugfs /sys/kernel/debug)'> ) } ) ] ) (C {<sysctl>} {<-q>} {<kernel.ftrace_enabled> <Id.Lit_Equals '='> <1>}) (command.AndOr ops: [Id.Op_DPipe] children: [ (command.Simple words: [ {<printf>} { (DQ <mark_page_accessed> <Id.Lit_BadBackslash '\\'> <nmark_buffer_dirty> <Id.Lit_BadBackslash '\\'> <nadd_to_page_cache_lru> <Id.Lit_BadBackslash '\\'> <naccount_page_dirtied> <Id.Lit_BadBackslash '\\'> <n> ) } ] redirects: [(redir op:<Id.Redir_Great '>'> loc:(redir_loc.Fd fd:1) arg:{<set_ftrace_filter>})] do_fork: T ) (C {<die>} {(DQ <'ERROR: tracing these four kernel functions: mark_page_accessed,'>)} { (DQ < 'mark_buffer_dirty, add_to_page_cache_lru and account_page_dirtied (unknown kernel version?). Exiting.' > ) } ) ] ) (C {<warn>} {(DQ <'echo nop > current_tracer'>)}) (command.If arms: [ (if_arm cond: (condition.Shell commands: [ (command.Sentence child: (command.Pipeline children: [ (command.Simple words: [{<echo>} {<1>}] redirects: [ (redir op: <Id.Redir_Great '>'> loc: (redir_loc.Fd fd:1) arg: {<function_profile_enabled>} ) ] do_fork: T ) ] negated: T ) terminator: <Id.Op_Semi _> ) ] ) action: [ (command.Simple words: [{<echo>}] redirects: [ (redir op: <Id.Redir_Great '>'> loc: (redir_loc.Fd fd:1) arg: {<set_ftrace_filter>} ) ] do_fork: T ) (C {<die>} {(DQ <'ERROR: enabling function profiling. Have CONFIG_FUNCTION_PROFILER? Exiting.'>)} ) ] spids: [463 476] ) ] ) (command.AndOr ops: [Id.Op_DAmp] children: [ (command.DParen child:<Id.Lit_ArithVarLike opt_timestamp>) (C {<printf>} {(DQ <'%-8s '>)} {<TIME>}) ] ) (C {<printf>} {(DQ <'%8s %8s %8s %8s %12s %10s'>)} {<HITS>} {<MISSES>} {<DIRTIES>} {<RATIO>} {(DQ <BUFFERS_MB>)} {(DQ <CACHE_MB>)} ) (command.AndOr ops: [Id.Op_DAmp] children: [(command.DParen child:<Id.Lit_ArithVarLike opt_debug>) (C {<printf>} {(DQ <' DEBUG'>)})] ) (C {<echo>}) (command.CommandList children: [ (command.Sentence child: (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:quit) op: assign_op.Equal rhs: {<0>} spids: [555] ) ] ) terminator: <Id.Op_Semi _> ) (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:secs) op: assign_op.Equal rhs: {<0>} spids: [559] ) ] ) ] ) (command.WhileUntil keyword: <Id.KW_While while> cond: (condition.Shell commands: [ (command.Sentence child: (command.DParen child: (arith_expr.Binary op_id: Id.Arith_DAmp left: (arith_expr.Unary op_id:Id.Arith_Bang child:<Id.Lit_ArithVarLike quit>) right: (arith_expr.Binary op_id: Id.Arith_DPipe left: (arith_expr.Unary op_id: Id.Arith_Bang child: <Id.Lit_ArithVarLike opt_duration> ) right: (arith_expr.Binary op_id: Id.Arith_Less left: <Id.Lit_ArithVarLike secs> right: <Id.Lit_ArithVarLike duration> ) ) ) ) terminator: <Id.Op_Semi _> ) ] ) body: (command.DoGroup children: [ (command.DParen child: (arith_expr.BinaryAssign op_id: Id.Arith_PlusEqual left: <Id.Lit_ArithVarLike secs> right: <Id.Lit_ArithVarLike interval> ) ) (command.Simple words: [{<echo>} {<0>}] redirects: [ (redir op: <Id.Redir_Great '>'> loc: (redir_loc.Fd fd:1) arg: {<function_profile_enabled>} ) ] do_fork: T ) (command.Simple words: [{<echo>} {<1>}] redirects: [ (redir op: <Id.Redir_Great '>'> loc: (redir_loc.Fd fd:1) arg: {<function_profile_enabled>} ) ] do_fork: T ) (C {<sleep>} {($ Id.VSub_DollarName '$interval')}) (command.AndOr ops: [Id.Op_DAmp] children: [ (command.DParen child:<Id.Lit_ArithVarLike opt_timestamp>) (C {<printf>} {(DQ <'%(%H:%M:%S)T '>)} {<-1>}) ] ) (command.Pipeline children: [ (C {<cat>} {<'/proc/meminfo'>} {<'trace_stat/function'> <Id.Lit_Star '*'>}) (C {<awk>} {<-v>} {<Id.Lit_VarLike 'debug='> ($ Id.VSub_DollarName '$opt_debug')} { (SQ <'\n'> <'\t# match meminfo stats:\n'> <'\t$1 == "Buffers:" && $3 == "kB" { buffers_mb = $2 / 1024 }\n'> <'\t$1 == "Cached:" && $3 == "kB" { cached_mb = $2 / 1024 }\n'> <'\t# identify and save trace counts:\n'> <'\t$2 ~ /[0-9]/ && $3 != "kB" { a[$1] += $2 }\n'> <'\tEND {\n'> <'\t\tmpa = a["mark_page_accessed"]\n'> <'\t\tmbd = a["mark_buffer_dirty"]\n'> <'\t\tapcl = a["add_to_page_cache_lru"]\n'> <'\t\tapd = a["account_page_dirtied"]\n'> <'\n'> <'\t\ttotal = mpa - mbd\n'> <'\t\tmisses = apcl - apd\n'> <'\t\tif (misses < 0)\n'> <'\t\t\tmisses = 0\n'> <'\t\thits = total - misses\n'> <'\n'> <'\t\tratio = 100 * hits / total\n'> <'\t\tprintf "%8d %8d %8d %7.1f%% %12.0f %10.0f", hits, misses, mbd,\n'> <'\t\t ratio, buffers_mb, cached_mb\n'> <'\t\tif (debug)\n'> <'\t\t\tprintf " (%d %d %d %d)", mpa, mbd, apcl, apd\n'> <'\t\tprintf "\\n"\n'> <'\t}'> ) } ) ] negated: F ) ] ) ) (command.Simple words: [{<echo>}] redirects: [(redir op:<Id.Redir_Great '2>'> loc:(redir_loc.Fd fd:2) arg:{<'/dev/null'>})] do_fork: T ) (command.Simple words: [{<echo>} {(DQ <'Ending tracing...'>)}] redirects: [(redir op:<Id.Redir_Great '2>'> loc:(redir_loc.Fd fd:2) arg:{<'/dev/null'>})] do_fork: T ) (C {<warn>} {(DQ <'echo 0 > function_profile_enabled'>)}) (C {<warn>} {(DQ <'echo > set_ftrace_filter'>)}) ] )