From: Liang Li <liang.z.li@intel.com>
To: qemu-devel@nongnu.org
Cc: amit.shah@redhat.com, yang.z.zhang@intel.com,
Liang Li <liang.z.li@intel.com>,
dgilbert@redhat.com, quintela@redhat.com
Subject: [Qemu-devel] [PATCH 0/3] Optimize the performance for single thread (de)compression
Date: Tue, 25 Aug 2015 19:59:07 +0800 [thread overview]
Message-ID: <1440503950-14174-1-git-send-email-liang.z.li@intel.com> (raw)
When the (de)compression thread count is set to 1, the current implementation
is inefficient because of the data copy and thread syncronization cost, a separate
single (de)compression thread is useless for performance improvement and will
result in performance degradation.
If (de)compression thread count is set to 1, we skip to use the multiple threads
mechanism.
Liang Li (3):
qemu-file: improve qemu_put_compression_data
migration: optimization for one compression thread
migration: optimization for one decompression thread
migration/qemu-file.c | 10 +++++++++-
migration/ram.c | 46 ++++++++++++++++++++++++++++++++++------------
2 files changed, 43 insertions(+), 13 deletions(-)
--
1.9.1
next reply other threads:[~2015-08-25 12:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-25 11:59 Liang Li [this message]
2015-08-25 11:59 ` [Qemu-devel] [PATCH 1/3] qemu-file: improve qemu_put_compression_data Liang Li
2015-08-25 11:59 ` [Qemu-devel] [PATCH 2/3] migration: optimization for one compression thread Liang Li
2015-08-25 11:59 ` [Qemu-devel] [PATCH 3/3] migration: optimization for one decompression thread Liang Li
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