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The profile utility can set the sprofiling mode

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- profile --nmi | --rtc sets the profiling mode

- --rtc is default, uses BIOS RTC, cannot profile kernel the presetted
  frequency values apply

- --nmi is only available in APIC mode as it uses the NMI watchdog, -f
  allows any frequency in Hz

- both modes use compatible data structures
This commit is contained in:
Tomas Hruby
2010-09-23 10:49:42 +00:00
parent db12229ce3
commit 74c5cd7668
8 changed files with 45 additions and 12 deletions
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31
commands/profile/profile.c
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@@ -48,6 +48,7 @@ int action = 0;
int mem_size = 0;
int mem_used = 0;
int freq = 0;
int intr_type = PROF_RTC;
char *outfile = "";
char *mem_ptr;
int outfile_fd, npipe_fd;
@@ -104,15 +105,27 @@ int main(int argc, char *argv[])
break;
}
/*
* Check the frequency when we know the intr type. Only selected values
* are correct for RTC
*/
if (action == START && intr_type == PROF_RTC &&
freq < MIN_FREQ || freq > MAX_FREQ) {
printf("Incorrect frequency.\n");
return 1;
}
printf("Statistical Profiling:\n");
printf(" profile start [-m memsize] [-o outfile] [-f frequency]\n");
printf(" profile start [--rtc | --nmi] "
"[-m memsize] [-o outfile] [-f frequency]\n");
printf(" profile stop\n\n");
printf(" --rtc is default, --nmi allows kernel profiling\n");
printf("Call Profiling:\n");
printf(" profile get [-m memsize] [-o outfile]\n");
printf(" profile reset\n\n");
printf(" - memsize in MB, default: %u\n", DEF_MEMSIZE);
printf(" - default output file: profile.{stat|call}.out\n");
printf( " - sample frequencies (default: %u):\n", DEF_FREQ);
printf( " - sample frequencies for --rtc (default: %u):\n", DEF_FREQ);
printf(" 3 8192 Hz 10 64 Hz\n");
printf(" 4 4096 Hz 11 32 Hz\n");
printf(" 5 2048 Hz 12 16 Hz\n");
@@ -160,13 +173,19 @@ int handle_args(int argc, char *argv[])
} else
if (strcmp(*argv, "-f") == 0) {
if (--argc == 0) return ESYNTAX;
if (sscanf(*++argv, "%u", &freq) != 1 ||
freq < MIN_FREQ || freq > MAX_FREQ) return EFREQ;
if (sscanf(*++argv, "%u", &freq) != 1)
return EFREQ;
} else
if (strcmp(*argv, "-o") == 0) {
if (--argc == 0) return ESYNTAX;
outfile = *++argv;
} else
if (strcmp(*argv, "--rtc") == 0) {
intr_type = PROF_RTC;
} else
if (strcmp(*argv, "--nmi") == 0) {
intr_type = PROF_NMI;
} else
if (strcmp(*argv, "start") == 0) {
if (action) return EACTION;
action = START;
@@ -224,7 +243,7 @@ int start()
if (alloc_mem()) return 1;
if (sprofile(PROF_START, mem_size, freq, &sprof_info, mem_ptr)) {
if (sprofile(PROF_START, mem_size, freq, intr_type, &sprof_info, mem_ptr)) {
perror("sprofile");
printf("Error starting profiling.\n");
return 1;
@@ -280,7 +299,7 @@ int stop()
int n;
char buf[BUFSIZE];
if (sprofile(PROF_STOP, 0, 0, 0, 0)) {
if (sprofile(PROF_STOP, 0, 0, 0, 0, 0)) {
perror("sprofile");
printf("Error stopping profiling.\n");
return 1;