/*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2007 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
} sched_average[] = {
{ compute_averunnable, &sched_nrun, SCHED_AVG_SECS(5), 0 },
{ compute_stack_target, NULL, SCHED_AVG_SECS(5), 1 },
+ { compute_memory_pressure, NULL, SCHED_AVG_SECS(1), 0 },
{ NULL, NULL, 0, 0 }
};
void
compute_averages(void)
{
- register processor_set_t pset = &default_pset;
- register int ncpus;
- register int nthreads, nshared;
- sched_average_t avg;
- register uint32_t factor_now = 0;
- register uint32_t average_now = 0;
- register uint32_t load_now = 0;
-
- if ((ncpus = pset->processor_count) > 0) {
- /*
- * Retrieve counts, ignoring
- * the current thread.
- */
- nthreads = pset->run_count - 1;
- nshared = pset->share_count;
-
- /*
- * Load average and mach factor calculations for
- * those which ask about these things.
- */
- average_now = nthreads * LOAD_SCALE;
-
- if (nthreads > ncpus)
- factor_now = (ncpus * LOAD_SCALE) / (nthreads + 1);
+ int ncpus, nthreads, nshared;
+ uint32_t factor_now, average_now, load_now = 0;
+ sched_average_t avg;
+
+ /*
+ * Retrieve counts, ignoring
+ * the current thread.
+ */
+ ncpus = processor_avail_count;
+ nthreads = sched_run_count - 1;
+ nshared = sched_share_count;
+
+ /*
+ * Load average and mach factor calculations for
+ * those which ask about these things.
+ */
+ average_now = nthreads * LOAD_SCALE;
+
+ if (nthreads > ncpus)
+ factor_now = (ncpus * LOAD_SCALE) / (nthreads + 1);
+ else
+ factor_now = (ncpus - nthreads) * LOAD_SCALE;
+
+ sched_mach_factor = ((sched_mach_factor << 2) + factor_now) / 5;
+ sched_load_average = ((sched_load_average << 2) + average_now) / 5;
+
+ /*
+ * Compute the timeshare priority
+ * conversion factor based on loading.
+ */
+ if (nshared > nthreads)
+ nshared = nthreads;
+
+ if (nshared > ncpus) {
+ if (ncpus > 1)
+ load_now = nshared / ncpus;
else
- factor_now = (ncpus - nthreads) * LOAD_SCALE;
-
- pset->mach_factor = ((pset->mach_factor << 2) + factor_now) / 5;
- pset->load_average = ((pset->load_average << 2) + average_now) / 5;
-
- /*
- * Compute the timeshare priority
- * conversion factor based on loading.
- */
- if (nshared > nthreads)
- nshared = nthreads;
-
- if (nshared > ncpus) {
- if (ncpus > 1)
- load_now = nshared / ncpus;
- else
- load_now = nshared;
-
- if (load_now > NRQS - 1)
- load_now = NRQS - 1;
- }
+ load_now = nshared;
- /*
- * The conversion factor consists of
- * two components: a fixed value based
- * on the absolute time unit, and a
- * dynamic portion based on loading.
- *
- * Zero loading results in a out of range
- * shift count. Accumulated usage is ignored
- * during conversion and new usage deltas
- * are discarded.
- */
- pset->pri_shift = sched_pri_shift - sched_load_shifts[load_now];
- }
- else {
- pset->mach_factor = pset->load_average = 0;
- pset->pri_shift = INT8_MAX;
- nthreads = pset->run_count;
+ if (load_now > NRQS - 1)
+ load_now = NRQS - 1;
}
+ /*
+ * The conversion factor consists of
+ * two components: a fixed value based
+ * on the absolute time unit, and a
+ * dynamic portion based on loading.
+ *
+ * Zero loading results in a out of range
+ * shift count. Accumulated usage is ignored
+ * during conversion and new usage deltas
+ * are discarded.
+ */
+ sched_pri_shift = sched_fixed_shift - sched_load_shifts[load_now];
+
/*
* Sample total running threads.
*/
projects / apple / xnu.git / blobdiff