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migration: Don't abuse qemu_file transferred for RDMA

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Just create a variable for it, the same way that multifd does.  This
way it is safe to use for other thread, etc, etc.

Reviewed-by: Leonardo Bras <leobras@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-Id: <20230515195709.63843-11-quintela@redhat.com>
This commit is contained in:
Juan Quintela 2023-05-15 21:57:03 +02:00
parent f16ecfa9f9
commit 67c31c9c1a
4 changed files with 28 additions and 5 deletions
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5
migration/migration-stats.c
View file

@ -61,8 +61,9 @@ void migration_rate_reset(QEMUFile *f)
uint64_t migration_transferred_bytes(QEMUFile *f)
{
uint64_t multifd = stat64_get(&mig_stats.multifd_bytes);
uint64_t rdma = stat64_get(&mig_stats.rdma_bytes);
uint64_t qemu_file = qemu_file_transferred(f);
trace_migration_transferred_bytes(qemu_file, multifd);
return qemu_file + multifd;
trace_migration_transferred_bytes(qemu_file, multifd, rdma);
return qemu_file + multifd + rdma;
}

4
migration/migration-stats.h
View file

@ -89,6 +89,10 @@ typedef struct {
* Maximum amount of data we can send in a cycle.
*/
Stat64 rate_limit_max;
/*
* Number of bytes sent through RDMA.
*/
Stat64 rdma_bytes;
/*
* Total number of bytes transferred.
*/

22
migration/rdma.c
View file

@ -2122,9 +2122,18 @@ retry:
return -EIO;
}
/*
* TODO: Here we are sending something, but we are not
* accounting for anything transferred. The following is wrong:
*
* stat64_add(&mig_stats.rdma_bytes, sge.length);
*
* because we are using some kind of compression. I
* would think that head.len would be the more similar
* thing to a correct value.
*/
stat64_add(&mig_stats.zero_pages,
sge.length / qemu_target_page_size());
return 1;
}
@ -2232,8 +2241,17 @@ retry:
set_bit(chunk, block->transit_bitmap);
stat64_add(&mig_stats.normal_pages, sge.length / qemu_target_page_size());
/*
* We are adding to transferred the amount of data written, but no
* overhead at all. I will asume that RDMA is magicaly and don't
* need to transfer (at least) the addresses where it wants to
* write the pages. Here it looks like it should be something
* like:
* sizeof(send_wr) + sge.length
* but this being RDMA, who knows.
*/
stat64_add(&mig_stats.rdma_bytes, sge.length);
ram_transferred_add(sge.length);
qemu_file_credit_transfer(f, sge.length);
rdma->total_writes++;
return 0;

2
migration/trace-events
View file

@ -191,7 +191,7 @@ process_incoming_migration_co_postcopy_end_main(void) ""
postcopy_preempt_enabled(bool value) "%d"
# migration-stats
migration_transferred_bytes(uint64_t qemu_file, uint64_t multifd) "qemu_file %" PRIu64 " multifd %" PRIu64
migration_transferred_bytes(uint64_t qemu_file, uint64_t multifd, uint64_t rdma) "qemu_file %" PRIu64 " multifd %" PRIu64 " RDMA %" PRIu64
# channel.c
migration_set_incoming_channel(void *ioc, const char *ioctype) "ioc=%p ioctype=%s"