From: Laurent Vivier <lvivier@redhat.com>
To: qemu-devel@nongnu.org
Cc: "Daniel P . Berrangé" <berrange@redhat.com>,
"Juan Quintela" <quintela@redhat.com>,
"Greg Kurz" <groug@kaod.org>,
"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
"Andrea Bolognani" <abologna@redhat.com>,
"David Gibson" <dgibson@redhat.com>,
"Frediano Ziglio" <fziglio@redhat.com>
Subject: [PATCH] migration: increase max-bandwidth to 128 MiB/s (1 Gib/s)
Date: Mon, 21 Sep 2020 16:49:57 +0200 [thread overview]
Message-ID: <20200921144957.979989-1-lvivier@redhat.com> (raw)
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>
---
migration/migration.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/migration/migration.c b/migration/migration.c
index 58a5452471f9..1c4174947181 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. */
--
2.26.2
next reply other threads:[~2020-09-21 14:52 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-21 14:49 Laurent Vivier [this message]
2020-09-22 0:46 ` [PATCH] migration: increase max-bandwidth to 128 MiB/s (1 Gib/s) David Gibson
2020-09-22 7:02 ` Greg Kurz
2020-09-22 12:11 ` Dr. David Alan Gilbert
2020-09-23 19:02 ` Dr. David Alan Gilbert
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