041eacc816
This plugin provides load balancing for VPP in a way that is largely inspired from Google's MagLev: http://research.google.com/pubs/pub44824.html More info in the README.md Change-Id: I1223f495d5c2d5200808a398504119f2830337e9 Signed-off-by: Pierre Pfister <ppfister@cisco.com>
42 lines
1.3 KiB
C
42 lines
1.3 KiB
C
/*
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* Copyright (c) 2016 Cisco and/or its affiliates.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <lb/refcount.h>
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void __vlib_refcount_resize(vlib_refcount_per_cpu_t *per_cpu, u32 size)
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{
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u32 *new_counter = 0, *old_counter;
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vec_validate(new_counter, size);
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memcpy(new_counter, per_cpu->counters, per_cpu->length);
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old_counter = per_cpu->counters;
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per_cpu->counters = new_counter;
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CLIB_MEMORY_BARRIER();
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per_cpu->length = vec_len(new_counter);
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vec_free(old_counter);
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}
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u64 vlib_refcount_get(vlib_refcount_t *r, u32 index)
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{
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u64 count = 0;
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vlib_thread_main_t *tm = vlib_get_thread_main ();
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u32 cpu_index;
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for (cpu_index = 0; cpu_index < tm->n_vlib_mains; cpu_index++) {
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if (r->per_cpu[cpu_index].length > index)
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count += r->per_cpu[cpu_index].counters[index];
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}
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return count;
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}
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