Author: andrew Date: Sat Dec 5 10:00:01 2015 New Revision: 291855 URL: https://svnweb.freebsd.org/changeset/base/291855
Log: Allow the artificial profile frames to be adjusted as needed by the user. While here update for armv6 to a tested value. Submitted by: Howard Su <[email protected]> Reviewed by: stat Differential Revision: https://reviews.freebsd.org/D4315 Modified: head/sys/cddl/dev/profile/profile.c Modified: head/sys/cddl/dev/profile/profile.c ============================================================================== --- head/sys/cddl/dev/profile/profile.c Sat Dec 5 09:53:58 2015 (r291854) +++ head/sys/cddl/dev/profile/profile.c Sat Dec 5 10:00:01 2015 (r291855) @@ -50,6 +50,7 @@ #include <sys/proc.h> #include <sys/selinfo.h> #include <sys/smp.h> +#include <sys/sysctl.h> #include <sys/uio.h> #include <sys/unistd.h> #include <machine/cpu.h> @@ -134,10 +135,7 @@ struct profile_probe_percpu; #endif #ifdef __arm__ -/* - * At least on ARMv7, this appears to work quite well. - */ -#define PROF_ARTIFICIAL_FRAMES 10 +#define PROF_ARTIFICIAL_FRAMES 3 #endif #ifdef __aarch64__ @@ -233,7 +231,12 @@ static dtrace_pops_t profile_pops = { static struct cdev *profile_cdev; static dtrace_provider_id_t profile_id; 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 nsec_to_sbt(hrtime_t nsec) @@ -352,7 +355,7 @@ profile_create(hrtime_t interval, char * prof->prof_kind = kind; prof->prof_id = dtrace_probe_create(profile_id, NULL, NULL, name, - profile_aframes ? profile_aframes : PROF_ARTIFICIAL_FRAMES, prof); + profile_aframes, prof); } /*ARGSUSED*/ _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "[email protected]"
