Introduce pmcstat(8) changes for summarizing hwpmc(4) callchain records in
in textual form and in gmon.out format. Update manual page. Sponsored by: FreeBSD Foundation and Google Inc.
This commit is contained in:
Joseph Koshy
parent
d07f36b075
commit
b6010f9e61
@ -6,7 +6,7 @@ PROG= pmcstat
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MAN= pmcstat.8
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DPADD= ${LIBKVM} ${LIBPMC} ${LIBM}
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LDADD= -lkvm -lpmc -lm
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LDADD= -lelf -lkvm -lpmc -lm
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WARNS?= 6
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@ -1,4 +1,6 @@
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.\" Copyright (c) 2003-2007 Joseph Koshy. All rights reserved.
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.\" Copyright (c) 2003-2007 Joseph Koshy
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.\" Copyright (c) 2007 The FreeBSD Foundation
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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@ -34,7 +36,9 @@
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.Op Fl C
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.Op Fl D Ar pathname
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.Op Fl E
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.Op Fl G Ar pathname
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.Op Fl M Ar mapfilename
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.Op Fl N
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.Op Fl O Ar logfilename
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.Op Fl P Ar event-spec
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.Op Fl R Ar logfilename
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@ -53,6 +57,7 @@
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.Op Fl t Ar process-spec
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.Op Fl v
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.Op Fl w Ar secs
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.Op Fl z Ar graphdepth
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.Op Ar command Op Ar args
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.Sh DESCRIPTION
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The
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@ -123,6 +128,16 @@ complex pipeline of processes when used in conjunction with the
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.Fl d
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option.
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The default is to not to enable per-process tracking.
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.It Fl G Ar pathname
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Print callchain information to file
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.Ar pathname .
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If argument
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.Ar pathname
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is a
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.Dq Li -
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this information is sent to the output file specified by the
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.Fl o
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option.
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.It Fl M Ar mapfilename
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Write the mapping between executable objects encountered in the event
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log and the abbreviated pathnames used for
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@ -138,6 +153,9 @@ in which case this mapping information is sent to the output
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file configured by the
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.Fl o
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option.
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.It Fl N
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Toggle capturing callchain information for subsequent sampling PMCs.
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The default is for sampling PMCs to capture callchain information.
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.It Fl O Ar logfilename
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Send logging output to file
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.Ar logfilename .
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@ -192,14 +210,15 @@ Argument
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is a comma separated list of CPU numbers, or the literal
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.Sq *
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denoting all CPUs.
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The default is to allocate system mode PMCs on all CPUs.
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The default is to allocate system mode PMCs on all active CPUs in
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the system.
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.It Fl d
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Toggle between process mode PMCs measuring events for the target
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process' current and future children or only measuring events for
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the target process.
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The default is to measure events for the target process alone.
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.It Fl g
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Produce flat execution profiles in a format compatible with
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Produce profiles in a format compatible with
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.Xr gprof 1 .
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A separate profile file is generated for each executable object
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encountered.
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@ -223,7 +242,10 @@ Send counter readings and textual representations of logged data
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to file
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.Ar outputfile .
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The default is to send output to
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.Pa stderr .
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.Pa stderr
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when collecting live data and to
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.Pa stdout
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when processing a pre-existing logfile.
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.It Fl p Ar event-spec
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Allocate a process mode counting PMC measuring hardware events
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specified in
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@ -257,6 +279,10 @@ The argument
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.Ar secs
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may be a fractional value.
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The default interval is 5 seconds.
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.It Fl z Ar graphdepth
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When printing system-wide callgraphs, limit callgraphs to the depth
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specified by argument
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.Ar graphdepth .
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.El
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.Pp
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If
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@ -286,9 +312,15 @@ To count instruction tlb-misses on CPUs 0 and 2 on a Intel
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Pentium Pro/Pentium III SMP system use:
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.Dl "pmcstat -c 0,2 -s p6-itlb-miss"
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.Pp
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To collect profiling information for a specific process with pid 1234
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based on instruction cache misses seen by it use:
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.Dl "pmcstat -P ic-misses -t 1234 -O /tmp/sample.out"
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.Pp
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To perform system-wide sampling on all configured processors
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based on processor instructions retired use:
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.Dl "pmcstat -S instructions -O /tmp/sample.out"
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If callgraph capture is not desired use:
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.Dl "pmcstat -N -S instructions -O /tmp/sample.out"
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.Pp
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To send the generated event log to a remote machine use:
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.Dl "pmcstat -S instructions -O remotehost:port"
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@ -298,10 +330,27 @@ On the remote machine, the sample log can be collected using
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.Pp
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To generate
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.Xr gprof 1
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compatible flat profiles from a sample file use:
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compatible profiles from a sample file use:
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.Dl "pmcstat -R /tmp/sample.out -g"
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.Pp
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To print a system-wide profile with callgraphs to file
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.Pa "foo.graph"
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use:
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.Dl "pmcstat -R /tmp/sample.out -G foo.graph"
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.Sh DIAGNOSTICS
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.Ex -std
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.Sh COMPATIBILITY
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Due to the limitations of the
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.Pa gmon.out
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file format,
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.Xr gprof 1
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compatible profiles generated by the
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.Fl g
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option do not contain information about calls that cross executable
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boundaries.
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The generated
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.Pa gmon.out
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files are also only meaningful for native executables.
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.Sh SEE ALSO
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.Xr gprof 1 ,
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.Xr nc 1 ,
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@ -1,7 +1,11 @@
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/*-
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* Copyright (c) 2003-2007, Joseph Koshy
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* Copyright (c) 2007 The FreeBSD Foundation
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* All rights reserved.
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*
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* Portions of this software were developed by A. Joseph Koshy under
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* sponsorship from the FreeBSD Foundation and Google, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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@ -486,7 +490,9 @@ pmcstat_show_usage(void)
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"\t -C\t\t (toggle) show cumulative counts\n"
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"\t -D path\t create profiles in directory \"path\"\n"
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"\t -E\t\t (toggle) show counts at process exit\n"
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"\t -G file\t write a system-wide callgraph to \"file\"\n"
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"\t -M file\t print executable/gmon file map to \"file\"\n"
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"\t -N\t\t (toggle) capture callchains\n"
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"\t -O file\t send log output to \"file\"\n"
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"\t -P spec\t allocate a process-private sampling PMC\n"
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"\t -R file\t read events from \"file\"\n"
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@ -504,7 +510,8 @@ pmcstat_show_usage(void)
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"\t -s spec\t allocate a system-wide counting PMC\n"
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"\t -t pid\t\t attach to running process with pid \"pid\"\n"
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"\t -v\t\t increase verbosity\n"
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"\t -w secs\t set printing time interval"
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"\t -w secs\t set printing time interval\n"
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"\t -z depth\t limit callchain display depth"
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);
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}
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@ -516,16 +523,17 @@ int
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main(int argc, char **argv)
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{
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double interval;
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int option, npmc, ncpu;
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int option, npmc, ncpu, haltedcpus;
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int c, check_driver_stats, current_cpu, current_sampling_count;
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int do_print, do_descendants;
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int do_logproccsw, do_logprocexit;
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int do_callchain, do_descendants, do_logproccsw, do_logprocexit;
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int do_print;
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size_t dummy;
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int graphdepth;
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int pipefd[2];
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int use_cumulative_counts;
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uint32_t cpumask;
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char *end, *tmp;
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const char *errmsg;
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const char *errmsg, *graphfilename;
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enum pmcstat_state runstate;
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struct pmc_driverstats ds_start, ds_end;
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struct pmcstat_ev *ev;
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@ -538,10 +546,12 @@ main(int argc, char **argv)
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check_driver_stats = 0;
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current_cpu = 0;
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current_sampling_count = DEFAULT_SAMPLE_COUNT;
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do_callchain = 1;
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do_descendants = 0;
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do_logproccsw = 0;
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do_logprocexit = 0;
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use_cumulative_counts = 0;
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graphfilename = "-";
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args.pa_required = 0;
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args.pa_flags = 0;
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args.pa_verbosity = 1;
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@ -550,21 +560,33 @@ main(int argc, char **argv)
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args.pa_kernel = strdup("/boot/kernel");
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args.pa_samplesdir = ".";
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args.pa_printfile = stderr;
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args.pa_graphdepth = DEFAULT_CALLGRAPH_DEPTH;
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args.pa_graphfile = NULL;
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args.pa_interval = DEFAULT_WAIT_INTERVAL;
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args.pa_mapfilename = NULL;
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args.pa_inputpath = NULL;
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args.pa_outputpath = NULL;
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STAILQ_INIT(&args.pa_events);
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SLIST_INIT(&args.pa_targets);
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bzero(&ds_start, sizeof(ds_start));
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bzero(&ds_end, sizeof(ds_end));
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ev = NULL;
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dummy = sizeof(ncpu);
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/*
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* The initial CPU mask specifies all non-halted CPUS in the
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* system.
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*/
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dummy = sizeof(int);
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if (sysctlbyname("hw.ncpu", &ncpu, &dummy, NULL, 0) < 0)
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err(EX_OSERR, "ERROR: Cannot determine #cpus");
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err(EX_OSERR, "ERROR: Cannot determine the number of CPUs");
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cpumask = (1 << ncpu) - 1;
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if (sysctlbyname("machdep.hlt_cpus", &haltedcpus, &dummy,
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NULL, 0) < 0)
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err(EX_OSERR, "ERROR: Cannot determine which CPUs are halted");
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cpumask &= ~haltedcpus;
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while ((option = getopt(argc, argv,
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"CD:EM:O:P:R:S:Wc:dgk:n:o:p:qr:s:t:vw:")) != -1)
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"CD:EG:M:NO:P:R:S:Wc:dgk:n:o:p:qr:s:t:vw:z:")) != -1)
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switch (option) {
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case 'C': /* cumulative values */
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use_cumulative_counts = !use_cumulative_counts;
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@ -598,6 +620,11 @@ main(int argc, char **argv)
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args.pa_required |= FLAG_HAS_PROCESS_PMCS;
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break;
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case 'G': /* produce a system-wide callgraph */
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args.pa_flags |= FLAG_DO_CALLGRAPHS;
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graphfilename = optarg;
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break;
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case 'g': /* produce gprof compatible profiles */
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args.pa_flags |= FLAG_DO_GPROF;
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break;
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@ -605,7 +632,7 @@ main(int argc, char **argv)
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case 'k': /* pathname to the kernel */
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free(args.pa_kernel);
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args.pa_kernel = strdup(optarg);
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args.pa_required |= FLAG_DO_GPROF;
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args.pa_required |= FLAG_DO_ANALYSIS;
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args.pa_flags |= FLAG_HAS_KERNELPATH;
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break;
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@ -619,6 +646,11 @@ main(int argc, char **argv)
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args.pa_mapfilename = optarg;
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break;
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case 'N':
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do_callchain = !do_callchain;
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args.pa_required |= FLAG_HAS_SAMPLING_PMCS;
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break;
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case 'p': /* process virtual counting PMC */
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case 's': /* system-wide counting PMC */
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case 'P': /* process virtual sampling PMC */
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@ -664,6 +696,8 @@ main(int argc, char **argv)
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ev->ev_cpu = PMC_CPU_ANY;
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ev->ev_flags = 0;
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if (do_callchain)
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ev->ev_flags |= PMC_F_CALLCHAIN;
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if (do_descendants)
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ev->ev_flags |= PMC_F_DESCENDANTS;
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if (do_logprocexit)
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@ -725,7 +759,7 @@ main(int argc, char **argv)
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break;
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case 'R': /* read an existing log file */
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if (args.pa_logparser != NULL)
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if (args.pa_inputpath != NULL)
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errx(EX_USAGE, "ERROR: option -R may only be "
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"specified once.");
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args.pa_inputpath = optarg;
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@ -761,6 +795,15 @@ main(int argc, char **argv)
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FLAG_HAS_COUNTING_PMCS | FLAG_HAS_OUTPUT_LOGFILE);
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break;
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case 'z':
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graphdepth = strtod(optarg, &end);
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if (*end != '\0' || graphdepth <= 0)
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errx(EX_USAGE, "ERROR: Illegal callchain "
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"depth \"%s\".", optarg);
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args.pa_graphdepth = graphdepth;
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args.pa_required |= FLAG_DO_CALLGRAPHS;
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break;
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case '?':
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default:
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pmcstat_show_usage();
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@ -771,9 +814,14 @@ main(int argc, char **argv)
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args.pa_argc = (argc -= optind);
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args.pa_argv = (argv += optind);
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args.pa_cpumask = cpumask; /* For selecting CPUs using -R. */
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if (argc) /* command line present */
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args.pa_flags |= FLAG_HAS_COMMANDLINE;
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if (args.pa_flags & (FLAG_DO_GPROF | FLAG_DO_CALLGRAPHS))
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args.pa_flags |= FLAG_DO_ANALYSIS;
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/*
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* Check invocation syntax.
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*/
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@ -822,9 +870,10 @@ main(int argc, char **argv)
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errx(EX_USAGE, "ERROR: options -d, -E, and -W require a "
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"process mode PMC to be specified.");
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/* check for -c cpu and not system mode PMCs */
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/* check for -c cpu with no system mode PMCs or logfile. */
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if ((args.pa_required & FLAG_HAS_SYSTEM_PMCS) &&
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(args.pa_flags & FLAG_HAS_SYSTEM_PMCS) == 0)
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(args.pa_flags & FLAG_HAS_SYSTEM_PMCS) == 0 &&
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(args.pa_flags & FLAG_READ_LOGFILE) == 0)
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errx(EX_USAGE, "ERROR: option -c requires at least one "
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"system mode PMC to be specified.");
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@ -837,14 +886,14 @@ main(int argc, char **argv)
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/* check for sampling mode options without a sampling PMC spec */
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if ((args.pa_required & FLAG_HAS_SAMPLING_PMCS) &&
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(args.pa_flags & FLAG_HAS_SAMPLING_PMCS) == 0)
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errx(EX_USAGE, "ERROR: options -n and -O require at least "
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"one sampling mode PMC to be specified.");
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errx(EX_USAGE, "ERROR: options -N, -n and -O require at "
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"least one sampling mode PMC to be specified.");
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/* check if -g is being used correctly */
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if ((args.pa_flags & FLAG_DO_GPROF) &&
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/* check if -g/-G are being used correctly */
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if ((args.pa_flags & FLAG_DO_ANALYSIS) &&
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!(args.pa_flags & (FLAG_HAS_SAMPLING_PMCS|FLAG_READ_LOGFILE)))
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errx(EX_USAGE, "ERROR: option -g requires sampling PMCs or -R "
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"to be specified.");
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errx(EX_USAGE, "ERROR: options -g/-G require sampling PMCs "
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"or -R to be specified.");
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/* check if -O was spuriously specified */
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if ((args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE) &&
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@ -853,16 +902,16 @@ main(int argc, char **argv)
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"ERROR: option -O is used only with options "
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"-E, -P, -S and -W.");
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/* -D dir and -k kernel path require -g or -R */
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/* -k kernel path require -g/-G or -R */
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if ((args.pa_flags & FLAG_HAS_KERNELPATH) &&
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(args.pa_flags & FLAG_DO_GPROF) == 0 &&
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(args.pa_flags & FLAG_DO_ANALYSIS) == 0 &&
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(args.pa_flags & FLAG_READ_LOGFILE) == 0)
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errx(EX_USAGE, "ERROR: option -k is only used with -g/-R.");
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/* -D only applies to gprof output mode (-g) */
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if ((args.pa_flags & FLAG_HAS_SAMPLESDIR) &&
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(args.pa_flags & FLAG_DO_GPROF) == 0 &&
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(args.pa_flags & FLAG_READ_LOGFILE) == 0)
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errx(EX_USAGE, "ERROR: option -D is only used with -g/-R.");
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(args.pa_flags & FLAG_DO_GPROF) == 0)
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errx(EX_USAGE, "ERROR: option -D is only used with -g.");
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/* -M mapfile requires -g or -R */
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if (args.pa_mapfilename != NULL &&
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@ -882,9 +931,9 @@ main(int argc, char **argv)
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"sampling PMCs are specified together.");
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/*
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* Check if "-k kerneldir" was specified, and if whether 'kerneldir'
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* actually refers to a a file. If so, use `dirname path` to determine
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* the kernel directory.
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* Check if "-k kerneldir" was specified, and if whether
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* 'kerneldir' actually refers to a a file. If so, use
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* `dirname path` to determine the kernel directory.
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*/
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if (args.pa_flags & FLAG_HAS_KERNELPATH) {
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(void) snprintf(buffer, sizeof(buffer), "%s%s", args.pa_fsroot,
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@ -910,13 +959,27 @@ main(int argc, char **argv)
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}
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}
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/*
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* If we have a callgraph be created, select the outputfile.
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*/
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if (args.pa_flags & FLAG_DO_CALLGRAPHS) {
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if (strcmp(graphfilename, "-") == 0)
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args.pa_graphfile = args.pa_printfile;
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else {
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args.pa_graphfile = fopen(graphfilename, "w");
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if (args.pa_graphfile == NULL)
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err(EX_OSERR, "ERROR: cannot open \"%s\" "
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"for writing", graphfilename);
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}
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}
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/* if we've been asked to process a log file, do that and exit */
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if (args.pa_flags & FLAG_READ_LOGFILE) {
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/*
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* Print the log in textual form if we haven't been
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* asked to generate gmon.out files.
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* asked to generate profiling information.
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*/
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if ((args.pa_flags & FLAG_DO_GPROF) == 0)
|
||||
if ((args.pa_flags & FLAG_DO_ANALYSIS) == 0)
|
||||
args.pa_flags |= FLAG_DO_PRINT;
|
||||
|
||||
pmcstat_initialize_logging(&args);
|
||||
@ -1162,7 +1225,7 @@ main(int argc, char **argv)
|
||||
FLAG_HAS_PIPE)) {
|
||||
runstate = pmcstat_close_log(&args);
|
||||
if (args.pa_flags &
|
||||
(FLAG_DO_PRINT|FLAG_DO_GPROF))
|
||||
(FLAG_DO_PRINT|FLAG_DO_ANALYSIS))
|
||||
pmcstat_process_log(&args);
|
||||
}
|
||||
do_print = 1; /* print PMCs at exit */
|
||||
|
||||
@ -1,7 +1,11 @@
|
||||
/*-
|
||||
* Copyright (c) 2005-2007, Joseph Koshy
|
||||
* Copyright (c) 2007 The FreeBSD Foundation
|
||||
* All rights reserved.
|
||||
*
|
||||
* Portions of this software were developed by A. Joseph Koshy under
|
||||
* sponsorship from the FreeBSD Foundation and Google, Inc.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
@ -43,11 +47,14 @@
|
||||
#define FLAG_HAS_SAMPLESDIR 0x00000800 /* -D dir */
|
||||
#define FLAG_HAS_KERNELPATH 0x00001000 /* -k kernel */
|
||||
#define FLAG_DO_PRINT 0x00002000 /* -o */
|
||||
#define FLAG_DO_CALLGRAPHS 0x00004000 /* -G */
|
||||
#define FLAG_DO_ANALYSIS 0x00008000 /* -g or -G */
|
||||
|
||||
#define DEFAULT_SAMPLE_COUNT 65536
|
||||
#define DEFAULT_WAIT_INTERVAL 5.0
|
||||
#define DEFAULT_DISPLAY_HEIGHT 23
|
||||
#define DEFAULT_BUFFER_SIZE 4096
|
||||
#define DEFAULT_CALLGRAPH_DEPTH 4
|
||||
|
||||
#define PRINT_HEADER_PREFIX "# "
|
||||
#define READPIPEFD 0
|
||||
@ -68,9 +75,9 @@
|
||||
#define PMCSTAT_LDD_COMMAND "/usr/bin/ldd"
|
||||
|
||||
#define PMCSTAT_PRINT_ENTRY(A,T,...) do { \
|
||||
fprintf((A)->pa_printfile, "%-8s", T); \
|
||||
fprintf((A)->pa_printfile, " " __VA_ARGS__); \
|
||||
fprintf((A)->pa_printfile, "\n"); \
|
||||
(void) fprintf((A)->pa_printfile, "%-9s", T); \
|
||||
(void) fprintf((A)->pa_printfile, " " __VA_ARGS__); \
|
||||
(void) fprintf((A)->pa_printfile, "\n"); \
|
||||
} while (0)
|
||||
|
||||
enum pmcstat_state {
|
||||
@ -112,7 +119,10 @@ struct pmcstat_args {
|
||||
char *pa_kernel; /* pathname of the kernel */
|
||||
const char *pa_samplesdir; /* directory for profile files */
|
||||
const char *pa_mapfilename;/* mapfile name */
|
||||
FILE *pa_graphfile; /* where to send the callgraph */
|
||||
int pa_graphdepth; /* print depth for callgraphs */
|
||||
double pa_interval; /* printing interval in seconds */
|
||||
uint32_t pa_cpumask; /* filter for CPUs analysed */
|
||||
int pa_argc;
|
||||
char **pa_argv;
|
||||
STAILQ_HEAD(, pmcstat_ev) pa_events;
|
||||
|
||||
File diff suppressed because it is too large
Load Diff
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Reference in New Issue
Block a user