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c16915b871
numam-dpdk/lib
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Maxime Coquelin c16915b871 vhost: improve dirty pages logging performance 
This patch caches all dirty pages logging until the used ring index
is updated.

The goal of this optimization is to fix a performance regression
introduced when the vhost library started to use atomic operations
to set bits in the shared dirty log map. While the fix was valid
as previous implementation wasn't safe against concurrent accesses,
contention was induced.

With this patch, during migration, we have:
1. Less atomic operations as only a single atomic OR operation
per 32 or 64 (depending on CPU) pages.
2. Less atomic operations as during a burst, the same page will
be marked dirty only once.
3. Less write memory barriers.

Fixes: 897f13a1f7 ("vhost: make page logging atomic")
Cc: stable@dpdk.org

Suggested-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Reviewed-by: Tiwei Bie <tiwei.bie@intel.com>
2018-05-17 14:19:05 +02:00
..
librte_acl build: replace license text with SPDX tag 2018-01-30 21:58:59 +01:00
librte_bbdev bbdev: split queue groups 2018-05-10 17:46:20 +01:00
librte_bitratestats bitratestats: fix library version in meson build 2018-03-28 00:07:35 +02:00
librte_bpf bpf: add missed experimental tags 2018-05-14 17:42:43 +02:00
librte_cfgfile build: replace license text with SPDX tag 2018-01-30 21:58:59 +01:00
librte_cmdline cmdline: standardize conversion of IP address strings 2018-04-23 21:31:40 +02:00
librte_compat compat: relicense some files 2018-02-06 23:13:47 +01:00
librte_compressdev compressdev: get device id from name 2018-05-10 17:46:20 +01:00
librte_cryptodev lib: clear experimental version tag in linker scripts 2018-05-14 03:37:28 +02:00
librte_distributor build: set compat lib as universal dependency 2018-01-30 21:59:00 +01:00
librte_eal version: 18.05-rc4 2018-05-15 22:38:39 +02:00
librte_efd build: replace license text with SPDX tag 2018-01-30 21:58:59 +01:00
librte_ethdev ethdev: improve doc for name by port ID API 2018-05-14 22:32:22 +01:00
librte_eventdev lib: clear experimental version tag in linker scripts 2018-05-14 03:37:28 +02:00
librte_flow_classify flow_classify: remove void pointer cast 2018-03-30 14:08:43 +02:00
librte_gro build: replace license text with SPDX tag 2018-01-30 21:58:59 +01:00
librte_gso build: replace license text with SPDX tag 2018-01-30 21:58:59 +01:00
librte_hash hash: explicit casts for truncation in CRC32c 2018-05-13 22:45:37 +02:00
librte_ip_frag ip_frag: fix some debug logs 2018-05-14 21:14:49 +02:00
librte_jobstats build: replace license text with SPDX tag 2018-01-30 21:58:59 +01:00
librte_kni fix ethdev port id validation 2018-04-18 00:37:05 +02:00
librte_kvargs kvargs: fix syntax in comments 2018-03-28 00:43:22 +02:00
librte_latencystats ethdev: remove experimental flag of ports enumeration 2018-04-27 18:00:24 +01:00
librte_lpm lpm: fix allocation of an existing object 2018-02-01 00:35:06 +01:00
librte_mbuf lib: clear experimental version tag in linker scripts 2018-05-14 03:37:28 +02:00
librte_member build: replace license text with SPDX tag 2018-01-30 21:58:59 +01:00
librte_mempool mempool: fix virtual address population 2018-05-15 16:30:14 +02:00
librte_meter lib: clear experimental version tag in linker scripts 2018-05-14 03:37:28 +02:00
librte_metrics metrics: fix potential missing string termination 2018-04-04 17:33:08 +02:00
librte_net lib: clear experimental version tag in linker scripts 2018-05-14 03:37:28 +02:00
librte_pci pci: use z specifier to format size_t 2018-04-04 13:43:33 +02:00
librte_pdump pdump: use generic multi-process channel 2018-04-18 01:26:21 +02:00
librte_pipeline lib: clear experimental version tag in linker scripts 2018-05-14 03:37:28 +02:00
librte_port build: remove checks for non-optional libraries 2018-04-17 16:09:43 +02:00
librte_power build: replace license text with SPDX tag 2018-01-30 21:58:59 +01:00
librte_rawdev rawdev: remove dead code 2018-05-14 01:01:11 +02:00
librte_reorder build: replace license text with SPDX tag 2018-01-30 21:58:59 +01:00
librte_ring ring: relax alignment constraint on ring structure 2018-04-18 00:24:22 +02:00
librte_sched lib: clear experimental version tag in linker scripts 2018-05-14 03:37:28 +02:00
librte_security security: extend userdata for IPsec events 2018-04-23 18:20:10 +01:00
librte_table table: add dedicated params struct for cuckoo hash 2018-05-08 16:19:58 +02:00
librte_timer eal: make semantics of lcore role function more intuitive 2018-04-26 16:58:18 +02:00
librte_vhost vhost: improve dirty pages logging performance 2018-05-17 14:19:05 +02:00
Makefile bpf: add BPF loading and execution framework 2018-05-12 00:35:15 +02:00
meson.build build: ensure compatibility with future meson versions 2018-05-08 22:22:02 +02:00