f57e5a6ce5
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Juan Quintela <quintela@redhat.com> Message-ID: <20231025091117.6342-8-quintela@redhat.com>
71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
/*
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* Migration stats
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*
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* Copyright (c) 2012-2023 Red Hat Inc
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*
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* Authors:
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* Juan Quintela <quintela@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "qemu/stats64.h"
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#include "qemu-file.h"
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#include "trace.h"
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#include "migration-stats.h"
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MigrationAtomicStats mig_stats;
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bool migration_rate_exceeded(QEMUFile *f)
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{
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if (qemu_file_get_error(f)) {
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return true;
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}
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uint64_t rate_limit_max = migration_rate_get();
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if (rate_limit_max == RATE_LIMIT_DISABLED) {
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return false;
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}
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uint64_t rate_limit_start = stat64_get(&mig_stats.rate_limit_start);
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uint64_t rate_limit_current = migration_transferred_bytes();
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uint64_t rate_limit_used = rate_limit_current - rate_limit_start;
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if (rate_limit_max > 0 && rate_limit_used > rate_limit_max) {
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return true;
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}
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return false;
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}
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uint64_t migration_rate_get(void)
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{
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return stat64_get(&mig_stats.rate_limit_max);
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}
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#define XFER_LIMIT_RATIO (1000 / BUFFER_DELAY)
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void migration_rate_set(uint64_t limit)
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{
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/*
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* 'limit' is per second. But we check it each BUFFER_DELAY milliseconds.
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*/
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stat64_set(&mig_stats.rate_limit_max, limit / XFER_LIMIT_RATIO);
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}
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void migration_rate_reset(QEMUFile *f)
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{
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stat64_set(&mig_stats.rate_limit_start, migration_transferred_bytes());
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}
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uint64_t migration_transferred_bytes(void)
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{
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uint64_t multifd = stat64_get(&mig_stats.multifd_bytes);
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uint64_t rdma = stat64_get(&mig_stats.rdma_bytes);
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uint64_t qemu_file = stat64_get(&mig_stats.qemu_file_transferred);
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trace_migration_transferred_bytes(qemu_file, multifd, rdma);
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return qemu_file + multifd + rdma;
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}
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