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[PULL,16/26] migration: increase max-bandwidth to 128 MiB/s (1 Gib/s)

Message ID 20200925120655.295142-17-dgilbert@redhat.com
State New
Headers show
Series [PULL,01/26] migration: Properly destroy variables on incoming side | expand

Commit Message

Dr. David Alan Gilbert Sept. 25, 2020, 12:06 p.m. UTC
From: Laurent Vivier <lvivier@redhat.com>

max-bandwidth is set by default to 32 MiB/s (256 Mib/s)
since 2008 (5bb7910af031c).

Most of the CPUs can dirty memory faster than that now,
and this is clearly a problem with POWER where the page
size is 64 kiB and not 4 KiB.

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Message-Id: <20200921144957.979989-1-lvivier@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
 migration/migration.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/migration/migration.c b/migration/migration.c
index 827f8be07d..de34c995af 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -57,7 +57,7 @@ 
 #include "qemu/queue.h"
 #include "multifd.h"
 
-#define MAX_THROTTLE  (32 << 20)      /* Migration transfer speed throttling */
+#define MAX_THROTTLE  (128 << 20)      /* Migration transfer speed throttling */
 
 /* Amount of time to allocate to each "chunk" of bandwidth-throttled
  * data. */