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Differential D4315 Diff 10771 head/sys/cddl/dev/profile/profile.c

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head/sys/cddl/dev/profile/profile.c

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#include <sys/lock.h> #include <sys/lock.h>
#include <sys/malloc.h> #include <sys/malloc.h>
#include <sys/module.h> #include <sys/module.h>
#include <sys/mutex.h> #include <sys/mutex.h>
#include <sys/poll.h> #include <sys/poll.h>
#include <sys/proc.h> #include <sys/proc.h>
#include <sys/selinfo.h> #include <sys/selinfo.h>
#include <sys/smp.h> #include <sys/smp.h>
#include <sys/sysctl.h>
#include <sys/uio.h> #include <sys/uio.h>
#include <sys/unistd.h> #include <sys/unistd.h>
#include <machine/cpu.h> #include <machine/cpu.h>
#include <machine/stdarg.h> #include <machine/stdarg.h>
#include <sys/dtrace.h> #include <sys/dtrace.h>
#include <sys/dtrace_bsd.h> #include <sys/dtrace_bsd.h>
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struct profile_probe_percpu; struct profile_probe_percpu;
#ifdef __mips #ifdef __mips
/* bogus */ /* bogus */
#define PROF_ARTIFICIAL_FRAMES 3 #define PROF_ARTIFICIAL_FRAMES 3
#endif #endif
#ifdef __arm__ #ifdef __arm__
/* #define PROF_ARTIFICIAL_FRAMES 3
* At least on ARMv7, this appears to work quite well.
*/
#define PROF_ARTIFICIAL_FRAMES 10
#endif #endif
#ifdef __aarch64__ #ifdef __aarch64__
/* TODO: verify */ /* TODO: verify */
#define PROF_ARTIFICIAL_FRAMES 10 #define PROF_ARTIFICIAL_FRAMES 10
#endif #endif
typedef struct profile_probe { typedef struct profile_probe {
▲ Show 20 Lines • Show All 79 Lines • ▼ Show 20 Linesstatic dtrace_pops_t profile_pops = {
NULL, NULL,
NULL, NULL,
profile_destroy profile_destroy
}; };
static struct cdev *profile_cdev; static struct cdev *profile_cdev;
static dtrace_provider_id_t profile_id; static dtrace_provider_id_t profile_id;
static hrtime_t profile_interval_min = NANOSEC / 5000; /* 5000 hz */ static hrtime_t profile_interval_min = NANOSEC / 5000; /* 5000 hz */
static int profile_aframes = 0; /* override */ static int profile_aframes = PROF_ARTIFICIAL_FRAMES;
SYSCTL_DECL(_kern_dtrace);
SYSCTL_NODE(_kern_dtrace, OID_AUTO, profile, CTLFLAG_RD, 0, "DTrace profile parameters");
SYSCTL_INT(_kern_dtrace_profile, OID_AUTO, aframes, CTLFLAG_RW, &profile_aframes,
0, "Skipped frames for profile provider");
static sbintime_t static sbintime_t
nsec_to_sbt(hrtime_t nsec) nsec_to_sbt(hrtime_t nsec)
{ {
time_t sec; time_t sec;
/* /*
* We need to calculate nsec * 2^32 / 10^9 * We need to calculate nsec * 2^32 / 10^9
* Seconds and nanoseconds are split to avoid overflow. * Seconds and nanoseconds are split to avoid overflow.
▲ Show 20 Lines • Show All 101 Lines • ▼ Show 20 Lines#ifdef illumos
prof->prof_cyclic = CYCLIC_NONE; prof->prof_cyclic = CYCLIC_NONE;
#else #else
prof->prof_interval = nsec_to_sbt(interval); prof->prof_interval = nsec_to_sbt(interval);
callout_init(&prof->prof_cyclic, 1); callout_init(&prof->prof_cyclic, 1);
#endif #endif
prof->prof_kind = kind; prof->prof_kind = kind;
prof->prof_id = dtrace_probe_create(profile_id, prof->prof_id = dtrace_probe_create(profile_id,
NULL, NULL, name, NULL, NULL, name,
profile_aframes ? profile_aframes : PROF_ARTIFICIAL_FRAMES, prof); profile_aframes, prof);
} }
/*ARGSUSED*/ /*ARGSUSED*/
static void static void
profile_provide(void *arg, dtrace_probedesc_t *desc) profile_provide(void *arg, dtrace_probedesc_t *desc)
{ {
int i, j, rate, kind; int i, j, rate, kind;
hrtime_t val = 0, mult = 1, len = 0; hrtime_t val = 0, mult = 1, len = 0;
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