Date: Mon, 29 Aug 2016 04:45:59 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r304974 - stable/11/sys/kern Message-ID: <201608290445.u7T4jxYJ035658@repo.freebsd.org>
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Author: kib Date: Mon Aug 29 04:45:58 2016 New Revision: 304974 URL: https://svnweb.freebsd.org/changeset/base/304974 Log: MFC r303548: Cache getbintime(9) answer in timehands. Modified: stable/11/sys/kern/kern_tc.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/kern/kern_tc.c ============================================================================== --- stable/11/sys/kern/kern_tc.c Mon Aug 29 04:44:24 2016 (r304973) +++ stable/11/sys/kern/kern_tc.c Mon Aug 29 04:45:58 2016 (r304974) @@ -68,6 +68,7 @@ struct timehands { uint64_t th_scale; u_int th_offset_count; struct bintime th_offset; + struct bintime th_bintime; struct timeval th_microtime; struct timespec th_nanotime; struct bintime th_boottime; @@ -235,9 +236,8 @@ fbclock_bintime(struct bintime *bt) do { th = timehands; gen = atomic_load_acq_int(&th->th_generation); - *bt = th->th_offset; + *bt = th->th_bintime; bintime_addx(bt, th->th_scale * tc_delta(th)); - bintime_add(bt, &th->th_boottime); atomic_thread_fence_acq(); } while (gen == 0 || gen != th->th_generation); } @@ -311,8 +311,7 @@ fbclock_getbintime(struct bintime *bt) do { th = timehands; gen = atomic_load_acq_int(&th->th_generation); - *bt = th->th_offset; - bintime_add(bt, &th->th_boottime); + *bt = th->th_bintime; atomic_thread_fence_acq(); } while (gen == 0 || gen != th->th_generation); } @@ -387,9 +386,8 @@ bintime(struct bintime *bt) do { th = timehands; gen = atomic_load_acq_int(&th->th_generation); - *bt = th->th_offset; + *bt = th->th_bintime; bintime_addx(bt, th->th_scale * tc_delta(th)); - bintime_add(bt, &th->th_boottime); atomic_thread_fence_acq(); } while (gen == 0 || gen != th->th_generation); } @@ -463,8 +461,7 @@ getbintime(struct bintime *bt) do { th = timehands; gen = atomic_load_acq_int(&th->th_generation); - *bt = th->th_offset; - bintime_add(bt, &th->th_boottime); + *bt = th->th_bintime; atomic_thread_fence_acq(); } while (gen == 0 || gen != th->th_generation); } @@ -1389,6 +1386,8 @@ tc_windup(struct bintime *new_boottimebi if (bt.sec != t) th->th_boottime.sec += bt.sec - t; } + th->th_bintime = th->th_offset; + bintime_add(&th->th_bintime, &th->th_boottime); /* Update the UTC timestamps used by the get*() functions. */ /* XXX shouldn't do this here. Should force non-`get' versions. */ bintime2timeval(&bt, &th->th_microtime); @@ -1808,9 +1807,8 @@ pps_event(struct pps_state *pps, int eve /* Convert the count to a timespec. */ tcount = pps->capcount - pps->capth->th_offset_count; tcount &= pps->capth->th_counter->tc_counter_mask; - bt = pps->capth->th_offset; + bt = pps->capth->th_bintime; bintime_addx(&bt, pps->capth->th_scale * tcount); - bintime_add(&bt, &pps->capth->th_boottime); bintime2timespec(&bt, &ts); /* If the timecounter was wound up underneath us, bail out. */
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