Det är konstigt. En chans du kör ett annat program som någon annanstans i vägen? Prova till exempel kör ". / Tstloop".

Även för gprof, använd-l alternativet (litet L). Jag:

$ gprof -l  ./semget
Flat profile:

Each sample counts as 0.01 seconds.
  %   cumulative   self              self     total
 time   seconds   seconds    calls  Ts/call  Ts/call  name
 57.10      0.13     0.13                             main (semget.c:21 @ 80485f0)
 25.12      0.18     0.06                             main (semget.c:18 @ 804861f)
  9.14      0.20     0.02                             main (semget.c:17 @ 8048614)
  6.85      0.22     0.02                             main (semget.c:16 @ 80485e4)

Vi kan marginellt utesluta sidan fel och liknande genom att titta på resultaten från / usr / bin / Temne-v. De smärre sidfel betyder OS reserverat en sida minne, och att den interna tabellerna ändrades, men det var inte avbrytas på grund av IO eller något liknande. Det visar sig, alla dessa beror på antingen profilanalys kod eller program invokation.

$ /usr/bin/time -vv  ./semget
555555.56 semop/s [0,0]
Command exited with non-zero status 24
        Command being timed: "./semget"
        User time (seconds): 2.85
        System time (seconds): 6.12
        Percent of CPU this job got: 99%
        Elapsed (wall clock) time (h:mm:ss or m:ss): 0:08.99
        Average shared text size (kbytes): 0
        Average unshared data size (kbytes): 0
        Average stack size (kbytes): 0
        Average total size (kbytes): 0
        Maximum resident set size (kbytes): 0
        Average resident set size (kbytes): 0
        Major (requiring I/O) page faults: 0
        Minor (reclaiming a frame) page faults: 135
        Voluntary context switches: 7
        Involuntary context switches: 53
        Swaps: 0
        File system inputs: 0
        File system outputs: 0
        Socket messages sent: 0
        Socket messages received: 0
        Signals delivered: 0
        Page size (bytes): 4096
        Exit status: 24

till Jim:

tstloop är det enda program jag gjorde re-run
$. / Tstloop
$ Gprof-l. / Tstloop
gprof: gmon.out fil saknas call-diagram uppgifter

Tack för att du tar den till andra forum.

att Otheus:

tstloop sammanställas med profilering:

 
$ /usr/bin/time -vv ./tstloop
125000.00 semop/s [0,0]
Command exited with non-zero status 24
        Command being timed: "tstloop"
        User time (seconds): 15.05
        System time (seconds): 24.33
        Percent of CPU this job got: 99%
        Elapsed (wall clock) time (h:mm:ss or m:ss): 0:39.39
        Average shared text size (kbytes): 0
        Average unshared data size (kbytes): 0
        Average stack size (kbytes): 0
        Average total size (kbytes): 0
        Maximum resident set size (kbytes): 0
        Average resident set size (kbytes): 0
        Major (requiring I/O) page faults: 0
        Minor (reclaiming a frame) page faults: 121
        Voluntary context switches: 1
        Involuntary context switches: 326
        Swaps: 0
        File system inputs: 0
        File system outputs: 0
        Socket messages sent: 0
        Socket messages received: 0
        Signals delivered: 0
        Page size (bytes): 4096
        Exit status: 24

 
$ /usr/bin/time -vv ./tstloop
128205.13 semop/s [0,0]
Command exited with non-zero status 24
        Command being timed: "./tstloop"
        User time (seconds): 15.39
        System time (seconds): 23.19
        Percent of CPU this job got: 99%
        Elapsed (wall clock) time (h:mm:ss or m:ss): 0:38.59
        Average shared text size (kbytes): 0
        Average unshared data size (kbytes): 0
        Average stack size (kbytes): 0
        Average total size (kbytes): 0
        Maximum resident set size (kbytes): 0
        Average resident set size (kbytes): 0
        Major (requiring I/O) page faults: 0
        Minor (reclaiming a frame) page faults: 101
        Voluntary context switches: 1
        Involuntary context switches: 112
        Swaps: 0
        File system inputs: 0
        File system outputs: 0
        Socket messages sent: 0
        Socket messages received: 0
        Signals delivered: 0
        Page size (bytes): 4096
        Exit status: 24

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Prova att köra gprof med-p och-l. Mina nyare version kanske inte behöver-p.

-p flaggan hjälpt, se resultat nedan

$ Gprof-p. / Tstloop
Platta profil:
Varje prov räknas som 0,01 sekunder.
% Ackumulerat själv egenföretagare totalt
temne sekunder sekunder samtal Ts / samtal Ts / samtal namn
99,70 3,64 3,64 viktigaste

OCH-l flagg.