diff options
| author | Ian Moffett <ian@osmora.org> | 2025-07-25 02:46:37 -0400 |
|---|---|---|
| committer | Ian Moffett <ian@osmora.org> | 2025-07-25 02:46:37 -0400 |
| commit | 48587c836af7a008eff4964094e97aa1c94a34b0 (patch) | |
| tree | 36ae14e50bd9420fbba0928f1f2cc8562aa86b7a | |
| parent | cf1bb5e566ad0e346af810b399d871a74031feb2 (diff) | |
kernel: accnt: Report how many cores are halted
Introduce reporting of the number of halted cores for the scheduler
accounting logic.
Signed-off-by: Ian Moffett <ian@osmora.org>
| -rw-r--r-- | sys/include/sys/sched.h | 2 | ||||
| -rw-r--r-- | sys/kern/kern_accnt.c | 20 |
2 files changed, 22 insertions, 0 deletions
diff --git a/sys/include/sys/sched.h b/sys/include/sys/sched.h index abc2718..7a859b2 100644 --- a/sys/include/sys/sched.h +++ b/sys/include/sys/sched.h @@ -49,11 +49,13 @@ struct sched_cpu { * * @nproc: Number processes running * @ncpu: Number of CPU cores + * @nhlt: Number of halted CPU cores * @quantum_usec: Scheduler quantum (microseconds) */ struct sched_stat { size_t nproc; uint16_t ncpu; + uint16_t nhlt; uint32_t quantum_usec; struct sched_cpu cpus[CPU_MAX]; }; diff --git a/sys/kern/kern_accnt.c b/sys/kern/kern_accnt.c index cd15863..51905e7 100644 --- a/sys/kern/kern_accnt.c +++ b/sys/kern/kern_accnt.c @@ -58,6 +58,25 @@ ctl_stat_read(struct ctlfs_dev *cdp, struct sio_txn *sio) return sio->len; } +static uint16_t +cpu_nhlt(void) +{ + uint16_t nhlt = 0; + struct cpu_info *ci; + + for (size_t i = 0; i < CPU_MAX; ++i) { + ci = cpu_get(i); + if (ci == NULL) { + continue; + } + if (!ci->online) { + ++nhlt; + } + } + + return nhlt; +} + /* * Get scheduler accounting information * @@ -71,6 +90,7 @@ sched_stat(struct sched_stat *statp) statp->nproc = atomic_load_64(&g_nthreads); statp->ncpu = cpu_count(); statp->quantum_usec = DEFAULT_TIMESLICE_USEC; + statp->nhlt = cpu_nhlt(); /* * Setup the per-cpu info/statistics |