Commit 8bc39233 authored by ChenLiang's avatar ChenLiang Committed by Juan Quintela
Browse files

migration: expose xbzrle cache miss rate 



expose xbzrle cache miss rate

Signed-off-by: default avatarChenLiang <chenliang88@huawei.com>
Signed-off-by: default avatarGonglei <arei.gonglei@huawei.com>
Reviewed-by: default avatarEric Blake <eblake@redhat.com>
Signed-off-by: default avatarJuan Quintela <quintela@redhat.com>
parent 58570ed8

arch_init.c

+18 −0
Original line number Diff line number Diff line
@@ -236,6 +236,7 @@ typedef struct AccountingInfo { 
    uint64_t xbzrle_bytes;

    uint64_t xbzrle_pages;

    uint64_t xbzrle_cache_miss;

    double xbzrle_cache_miss_rate;

    uint64_t xbzrle_overflows;

} AccountingInfo;
@@ -291,6 +292,11 @@ uint64_t xbzrle_mig_pages_cache_miss(void) 
    return acct_info.xbzrle_cache_miss;

}



double xbzrle_mig_cache_miss_rate(void)

{

    return acct_info.xbzrle_cache_miss_rate;

}



uint64_t xbzrle_mig_pages_overflow(void)

{

    return acct_info.xbzrle_overflows;
@@ -489,6 +495,8 @@ static void migration_bitmap_sync(void) 
    static int64_t num_dirty_pages_period;

    int64_t end_time;

    int64_t bytes_xfer_now;

    static uint64_t xbzrle_cache_miss_prev;

    static uint64_t iterations_prev;



    bitmap_sync_count++;
@@ -532,6 +540,16 @@ static void migration_bitmap_sync(void) 
        } else {

             mig_throttle_on = false;

        }

        if (migrate_use_xbzrle()) {

            if (iterations_prev != 0) {

                acct_info.xbzrle_cache_miss_rate =

                   (double)(acct_info.xbzrle_cache_miss -

                            xbzrle_cache_miss_prev) /

                   (acct_info.iterations - iterations_prev);

            }

            iterations_prev = acct_info.iterations;

            xbzrle_cache_miss_prev = acct_info.xbzrle_cache_miss;

        }

        s->dirty_pages_rate = num_dirty_pages_period * 1000

            / (end_time - start_time);

        s->dirty_bytes_rate = s->dirty_pages_rate * TARGET_PAGE_SIZE;

hmp.c

+2 −0
Original line number Diff line number Diff line
@@ -214,6 +214,8 @@ void hmp_info_migrate(Monitor *mon, const QDict *qdict) 
                       info->xbzrle_cache->pages);

        monitor_printf(mon, "xbzrle cache miss: %" PRIu64 "\n",

                       info->xbzrle_cache->cache_miss);

        monitor_printf(mon, "xbzrle cache miss rate: %0.2f\n",

                       info->xbzrle_cache->cache_miss_rate);

        monitor_printf(mon, "xbzrle overflow : %" PRIu64 "\n",

                       info->xbzrle_cache->overflow);

    }

include/migration/migration.h

+1 −0
Original line number Diff line number Diff line
@@ -124,6 +124,7 @@ uint64_t xbzrle_mig_bytes_transferred(void); 
uint64_t xbzrle_mig_pages_transferred(void);

uint64_t xbzrle_mig_pages_overflow(void);

uint64_t xbzrle_mig_pages_cache_miss(void);

double xbzrle_mig_cache_miss_rate(void);



void ram_handle_compressed(void *host, uint8_t ch, uint64_t size);

migration.c

+1 −0
Original line number Diff line number Diff line
@@ -174,6 +174,7 @@ static void get_xbzrle_cache_stats(MigrationInfo *info) 
        info->xbzrle_cache->bytes = xbzrle_mig_bytes_transferred();

        info->xbzrle_cache->pages = xbzrle_mig_pages_transferred();

        info->xbzrle_cache->cache_miss = xbzrle_mig_pages_cache_miss();

        info->xbzrle_cache->cache_miss_rate = xbzrle_mig_cache_miss_rate();

        info->xbzrle_cache->overflow = xbzrle_mig_pages_overflow();

    }

}

qapi-schema.json

+4 −1
Original line number Diff line number Diff line
@@ -674,13 +674,16 @@ 
#

# @cache-miss: number of cache miss

#

# @cache-miss-rate: rate of cache miss (since 2.1)

#

# @overflow: number of overflows

#

# Since: 1.2

##

{ 'type': 'XBZRLECacheStats',

  'data': {'cache-size': 'int', 'bytes': 'int', 'pages': 'int',

           'cache-miss': 'int', 'overflow': 'int' } }

           'cache-miss': 'int', 'cache-miss-rate': 'number',

           'overflow': 'int' } }



##

# @MigrationInfo