Differential D4315 Diff 10656 sys/cddl/dev/profile/profile.c

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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 Lines	static 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_UINT(_kern_dtrace_profile, OID_AUTO, aframes, CTLFLAG_RW, &profile_aframes,
		stasUnsubmitted Not Done Inline Actions SYSCTL_INT? stas: SYSCTL_INT?
		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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