diff options
| author | Scott Soule Cheloha <cheloha@cvs.openbsd.org> | 2024-02-29 00:18:49 +0000 |
|---|---|---|
| committer | Scott Soule Cheloha <cheloha@cvs.openbsd.org> | 2024-02-29 00:18:49 +0000 |
| commit | 8a0b0e8799b1675f2cc06f19940c4ce49387d345 (patch) | |
| tree | ed4dad958c27495cff504422c3ebe6d7a488c502 | |
| parent | 0340ebb3004c4c093389677f9bc48d26a31a23f6 (diff) | |
dt(4): interval, profile: schedule clockintr relative to start of recording
For the interval and profile providers, schedule the first clock
interrupt to occur dp_nsecs nanoseconds after the start of recording.
This makes the interval between the start of recording and the first
event consistent across runs.
With input from claudio@. Simplified by claudio@.
Thread: https://marc.info/?l=openbsd-tech&m=170879058205043&w=2
ok mpi@ claudio@
| -rw-r--r-- | sys/dev/dt/dt_dev.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sys/dev/dt/dt_dev.c b/sys/dev/dt/dt_dev.c index e11122687eb..98b19792d82 100644 --- a/sys/dev/dt/dt_dev.c +++ b/sys/dev/dt/dt_dev.c @@ -1,4 +1,4 @@ -/* $OpenBSD: dt_dev.c,v 1.31 2024/02/18 00:54:03 cheloha Exp $ */ +/* $OpenBSD: dt_dev.c,v 1.32 2024/02/29 00:18:48 cheloha Exp $ */ /* * Copyright (c) 2019 Martin Pieuchot <mpi@openbsd.org> @@ -477,6 +477,7 @@ dt_ioctl_get_stats(struct dt_softc *sc, struct dtioc_stat *dtst) int dt_ioctl_record_start(struct dt_softc *sc) { + uint64_t now; struct dt_pcb *dp; if (sc->ds_recording) @@ -487,6 +488,7 @@ dt_ioctl_record_start(struct dt_softc *sc) return ENOENT; rw_enter_write(&dt_lock); + now = nsecuptime(); TAILQ_FOREACH(dp, &sc->ds_pcbs, dp_snext) { struct dt_probe *dtp = dp->dp_dtp; @@ -497,7 +499,8 @@ dt_ioctl_record_start(struct dt_softc *sc) if (dp->dp_nsecs != 0) { clockintr_bind(&dp->dp_clockintr, dp->dp_cpu, dt_clock, dp); - clockintr_advance(&dp->dp_clockintr, dp->dp_nsecs); + clockintr_schedule(&dp->dp_clockintr, + now + dp->dp_nsecs); } } rw_exit_write(&dt_lock); |