From patchwork Wed Jan 16 16:25:06 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [RFC, V1, 12/14] qcow2: Add qcow2_dedup_update_metrics to compute dedup RAM usage. From: =?utf-8?q?Beno=C3=AEt_Canet?= X-Patchwork-Id: 213006 Message-Id: <1358353508-5369-13-git-send-email-benoit@irqsave.net> To: qemu-devel@nongnu.org Cc: kwolf@redhat.com, pbonzini@redhat.com, =?UTF-8?q?Beno=C3=AEt=20Canet?= , stefanha@redhat.com Date: Wed, 16 Jan 2013 17:25:06 +0100 --- block/qcow2-dedup.c | 13 +++++++++++++ block/qcow2.h | 1 + 2 files changed, 14 insertions(+) diff --git a/block/qcow2-dedup.c b/block/qcow2-dedup.c index db23b71..4305746 100644 --- a/block/qcow2-dedup.c +++ b/block/qcow2-dedup.c @@ -1311,3 +1311,16 @@ void qcow2_dedup_close(BlockDriverState *bs) { qcow2_dedup_free(bs); } + +#define GTREE_NODE_SIZE sizeof(int) * 5 + +void qcow2_dedup_update_metrics(BlockDriverState *bs) +{ + BDRVQcowState *s = bs->opaque; + + uint64_t nb_hashs = s->dedup_metrics.ram_hash_creations - + s->dedup_metrics.ram_hash_deletions; + + s->dedup_metrics.ram_usage = nb_hashs * GTREE_NODE_SIZE * 2; + s->dedup_metrics.ram_usage += nb_hashs * sizeof(QCowHashNode); +} diff --git a/block/qcow2.h b/block/qcow2.h index 0729ff2..d8e8539 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -510,5 +510,6 @@ void qcow2_dedup_refcount_half_max_reached(BlockDriverState *bs, bool qcow2_dedup_is_running(BlockDriverState *bs); int qcow2_dedup_init(BlockDriverState *bs); void qcow2_dedup_close(BlockDriverState *bs); +void qcow2_dedup_update_metrics(BlockDriverState *bs); #endif