11/*
22** ATOP - System & Process Monitor
33**
4- ** The program 'atop' offers the possibility to view the activity of
4+ ** The program 'atop' offers the possibility to view the activity of
55** the system on system-level as well as process-level.
66**
77** This source-file contains the main-function, which verifies the
8- ** calling-parameters and takes care of initialization.
8+ ** calling-parameters and takes care of initialization.
99** The engine-function drives the main sample-loop in which after the
1010** indicated interval-time a snapshot is taken of the system-level and
1111** process-level counters and the deviations are calculated and
3535** --------------------------------------------------------------------------
3636**
3737** After initialization, the main-function calls the ENGINE.
38- ** For every cycle (so after another interval) the ENGINE calls various
38+ ** For every cycle (so after another interval) the ENGINE calls various
3939** functions as shown below:
4040**
4141** +---------------------------------------------------------------------+
4848** | | ^ | ^ | ^ | ^ | | |
4949** +---|-----|--------|-----|--------|----|--------|----|--------|----|--+
5050** | | | | | | | | | |
51- ** +--V-----|--+ +--V-----|--+ +--V----|--+ +--V----|--+ +--V----|-+
51+ ** +--V-----|--+ +--V-----|--+ +--V----|--+ +--V----|--+ +--V----|-+
5252** | | | | | | | | | |
5353** | photosyst | | photoproc | | acct | | deviate | | print |
5454** | | | | |photoproc | | ...syst | | |
5555** | | | | | | | ...proc | | |
56- ** +-----------+ +-----------+ +----------+ +----------+ +---------+
56+ ** +-----------+ +-----------+ +----------+ +----------+ +---------+
5757** ^ ^ ^ ^ |
5858** | | | | |
59- ** | | | V V
59+ ** | | | V V
6060** ______ _________ __________ ________ _________
6161** / \ / \ / \ / \ / \
6262** /proc /proc accounting task screen or
8484** When all counters have been gathered, functions are called to calculate
8585** the difference between the current counter-values and the counter-values
8686** of the previous cycle. These functions operate on the system-level
87- ** as well as on the task-level counters.
88- ** These differences are stored in a new structure(-table).
87+ ** as well as on the task-level counters.
88+ ** These differences are stored in a new structure(-table).
8989**
9090** - deviatsyst()
9191** Calculates the differences between the current system-level
9898** task-database; this "database" is implemented as a linked list
9999** of taskinfo structures in memory (so no disk-accesses needed).
100100** Within this linked list hash-buckets are maintained for fast searches.
101- ** The entire task-database is handled via a set of well-defined
101+ ** The entire task-database is handled via a set of well-defined
102102** functions from which the name starts with "pdb_..." (see the
103103** source-file procdbase.c).
104104** The processes which have been finished during the last cycle
112112** these addresses can be modified in the main-function depending on particular
113113** flags. In this way various representation-layers (ASCII, graphical, ...)
114114** can be linked with 'atop'; the one to use can eventually be chosen
115- ** at runtime.
115+ ** at runtime.
116116**
117117** $Log: atop.c,v $
118118** Revision 1.49 2010/10/23 14:01:00 gerlof
296296#include "showgeneric.h"
297297#include "parseable.h"
298298#include "gpucom.h"
299+ #include "photobpf.h"
299300
300301#define allflags "ab:cde:fghijklmnopqrstuvwxyz1ABCDEFGHIJKL:MNOP:QRSTUVWXYZ"
301302#define MAXFL 64 /* maximum number of command-line flags */
@@ -322,6 +323,16 @@ char threadview = 0; /* boolean: show individual threads */
322323char calcpss = 0 ; /* boolean: read/calculate process PSS */
323324char getwchan = 0 ; /* boolean: obtain wchan string */
324325
326+ /*
327+ ** arguments for bpf stats sampling
328+ ** We enable bpf stats for bpfsampleinterval seconds every bpfsamplerate
329+ ** atop intervals. bpfsampleinterval must be smaller than atop interval.
330+ **
331+ ** If bpfsamplerate == 0, disable sampling of bpf stats.
332+ */
333+ unsigned int bpfsamplerate = 1 ;
334+ unsigned int bpfsampleinterval = 1 ;
335+
325336unsigned short hertz ;
326337unsigned int pagesize ;
327338unsigned int nrgpus ;
@@ -391,6 +402,9 @@ void do_almostcrit(char *, char *);
391402void do_atopsarflags (char * , char * );
392403void do_pacctdir (char * , char * );
393404void do_perfevents (char * , char * );
405+ void do_bpflines (char * , char * );
406+ void do_bpfsamplerate (char * , char * );
407+ void do_bpfsampleinterval (char * , char * );
394408
395409static struct {
396410 char * tag ;
@@ -440,6 +454,9 @@ static struct {
440454 { "atopsarflags" , do_atopsarflags , 0 , },
441455 { "perfevents" , do_perfevents , 0 , },
442456 { "pacctdir" , do_pacctdir , 1 , },
457+ { "bpflines" , do_bpflines , 0 , },
458+ { "bpfsamplerate" , do_bpfsamplerate , 0 , },
459+ { "bpfsampleinterval" , do_bpfsampleinterval , 0 , },
443460};
444461
445462/*
@@ -466,6 +483,8 @@ main(int argc, char *argv[])
466483 exit (42 );
467484 }
468485
486+ photo_bpf_check ();
487+
469488 /*
470489 ** preserve command arguments to allow restart of other version
471490 */
@@ -497,12 +516,12 @@ main(int argc, char *argv[])
497516 if ( memcmp (p , "atopsar" , 7 ) == 0 )
498517 return atopsar (argc , argv );
499518
500- /*
501- ** interpret command-line arguments & flags
519+ /*
520+ ** interpret command-line arguments & flags
502521 */
503522 if (argc > 1 )
504523 {
505- /*
524+ /*
506525 ** gather all flags for visualization-functions
507526 **
508527 ** generic flags will be handled here;
@@ -600,17 +619,17 @@ main(int argc, char *argv[])
600619 }
601620
602621 /*
603- ** get optional interval-value and optional number of samples
622+ ** get optional interval-value and optional number of samples
604623 */
605624 if (optind < argc && optind < MAXFL )
606625 {
607626 if (!numeric (argv [optind ]))
608627 prusage (argv [0 ]);
609-
628+
610629 interval = atoi (argv [optind ]);
611-
630+
612631 optind ++ ;
613-
632+
614633 if (optind < argc )
615634 {
616635 if (!numeric (argv [optind ]) )
@@ -766,6 +785,7 @@ engine(void)
766785 gpupending = 0 ; /* boolean: request sent */
767786
768787 struct gpupidstat * gp = NULL ;
788+ struct bstats * bstats = NULL ;
769789
770790 /*
771791 ** initialization: allocate required memory dynamically
@@ -817,6 +837,8 @@ engine(void)
817837 if (nrgpus )
818838 supportflags |= GPUSTAT ;
819839
840+ if (system_support_bpf ())
841+ supportflags |= BPFSTAT ;
820842 /*
821843 ** MAIN-LOOP:
822844 ** - Wait for the requested number of seconds or for other trigger
@@ -838,11 +860,15 @@ engine(void)
838860 /*
839861 ** if the limit-flag is specified:
840862 ** check if the next sample is expected before midnight;
841- ** if not, stop atop now
863+ ** if not, stop atop now
842864 */
843865 if (midnightflag && (curtime + interval ) > timelimit )
844866 break ;
845867
868+ if ((supportflags & BPFSTAT ) &&
869+ bpfsamplerate && sampcnt % bpfsamplerate == 0 )
870+ bstats = get_devbstats ();
871+
846872 /*
847873 ** wait for alarm-signal to arrive (except first sample)
848874 ** or wait for SIGUSR1/SIGUSR2
@@ -859,13 +885,13 @@ engine(void)
859885 curtime = time (0 ); /* seconds since 1-1-1970 */
860886
861887 /*
862- ** send request for statistics to atopgpud
888+ ** send request for statistics to atopgpud
863889 */
864890 if (nrgpus )
865891 gpupending = gpud_statrequest ();
866892
867893 /*
868- ** take a snapshot of the current system-level statistics
894+ ** take a snapshot of the current system-level statistics
869895 ** and calculate the deviations (i.e. calculate the activity
870896 ** during the last sample)
871897 */
@@ -918,7 +944,7 @@ engine(void)
918944 curtime - pretime > 0 ? curtime - pretime : 1 );
919945
920946 /*
921- ** take a snapshot of the current task-level statistics
947+ ** take a snapshot of the current task-level statistics
922948 ** and calculate the deviations (i.e. calculate the activity
923949 ** during the last sample)
924950 **
@@ -1013,10 +1039,14 @@ engine(void)
10131039 ** the deviations
10141040 */
10151041 lastcmd = (vis .show_samp )( curtime ,
1016- curtime - pretime > 0 ? curtime - pretime : 1 ,
1017- & devtstat , devsstat ,
1018- nprocexit , noverflow , sampcnt == 0 );
1042+ curtime - pretime > 0 ? curtime - pretime : 1 ,
1043+ & devtstat , devsstat , bstats ,
1044+ nprocexit , noverflow , sampcnt == 0 );
10191045
1046+ if (bstats ) {
1047+ free (bstats -> bpfall );
1048+ bstats = NULL ;
1049+ }
10201050 /*
10211051 ** release dynamically allocated memory
10221052 */
@@ -1065,7 +1095,7 @@ prusage(char *myname)
10651095 printf ("\t -%c show version information\n" , MVERSION );
10661096 printf ("\t -%c show or log all processes (i.s.o. active processes "
10671097 "only)\n" , MALLPROC );
1068- printf ("\t -%c calculate proportional set size (PSS) per process\n" ,
1098+ printf ("\t -%c calculate proportional set size (PSS) per process\n" ,
10691099 MCALCPSS );
10701100 printf ("\t -%c determine WCHAN (string) per thread\n" , MGETWCHAN );
10711101 printf ("\t -P generate parseable output for specified label(s)\n" );
@@ -1146,6 +1176,18 @@ do_linelength(char *name, char *val)
11461176 linelen = get_posval (name , val );
11471177}
11481178
1179+ void
1180+ do_bpfsamplerate (char * name , char * val )
1181+ {
1182+ bpfsamplerate = get_posval (name , val );
1183+ }
1184+
1185+ void
1186+ do_bpfsampleinterval (char * name , char * val )
1187+ {
1188+ bpfsampleinterval = get_posval (name , val );
1189+ }
1190+
11491191/*
11501192** read RC-file and modify defaults accordingly
11511193*/
@@ -1196,7 +1238,7 @@ readrc(char *path, int syslevel)
11961238 default :
11971239 if (tagname [0 ] == '#' )
11981240 continue ;
1199-
1241+
12001242 if (tagvalue [0 ] != '#' )
12011243 break ;
12021244
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