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migration: Move rate_limit_max and rate_limit_used to migration_stats

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These way we can make them atomic and use this functions from any
place.  I also moved all functions that use rate_limit to
migration-stats.

Functions got renamed, they are not qemu_file anymore.

qemu_file_rate_limit -> migration_rate_exceeded
qemu_file_set_rate_limit -> migration_rate_set
qemu_file_get_rate_limit -> migration_rate_get
qemu_file_reset_rate_limit -> migration_rate_reset
qemu_file_acct_rate_limit -> migration_rate_account.

Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-Id: <20230515195709.63843-6-quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Juan Quintela 2023-05-15 21:56:58 +02:00
parent de37f8b9c2
commit e1fde0e038
16 changed files with 124 additions and 90 deletions
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46
migration/migration-stats.h
View file

@ -15,6 +15,12 @@
#include "qemu/stats64.h"
/*
* Amount of time to allocate to each "chunk" of bandwidth-throttled
* data.
*/
#define BUFFER_DELAY 100
/*
* If rate_limit_max is 0, there is special code to remove the rate
* limit.
@ -75,6 +81,14 @@ typedef struct {
* Number of bytes sent during precopy stage.
*/
Stat64 precopy_bytes;
/*
* Maximum amount of data we can send in a cycle.
*/
Stat64 rate_limit_max;
/*
* Amount of data we have sent in the current cycle.
*/
Stat64 rate_limit_used;
/*
* Total number of bytes transferred.
*/
@ -87,4 +101,36 @@ typedef struct {
extern MigrationAtomicStats mig_stats;
/**
* migration_rate_account: Increase the number of bytes transferred.
*
* Report on a number of bytes the have been transferred that need to
* be applied to the rate limiting calcuations.
*
* @len: amount of bytes transferred
*/
void migration_rate_account(uint64_t len);
/**
* migration_rate_get: Get the maximum amount that can be transferred.
*
* Returns the maximum number of bytes that can be transferred in a cycle.
*/
uint64_t migration_rate_get(void);
/**
* migration_rate_reset: Reset the rate limit counter.
*
* This is called when we know we start a new transfer cycle.
*/
void migration_rate_reset(void);
/**
* migration_rate_set: Set the maximum amount that can be transferred.
*
* Sets the maximum amount of bytes that can be transferred in one cycle.
*
* @new_rate: new maximum amount
*/
void migration_rate_set(uint64_t new_rate);
#endif