iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
679,081 Commits 104 Branches 1,843 Tags
Go to file
Clone
Open with VS Code Open with VSCodium Open with Intellij IDEA
Max Gurtovoy fe631457ff blk-mq: map all HWQ also in hyperthreaded system 
This patch performs sequential mapping between CPUs and queues.
In case the system has more CPUs than HWQs then there are still
CPUs to map to HWQs. In hyperthreaded system, map the unmapped CPUs
and their siblings to the same HWQ.
This actually fixes a bug that found unmapped HWQs in a system with
2 sockets, 18 cores per socket, 2 threads per core (total 72 CPUs)
running NVMEoF (opens upto maximum of 64 HWQs).

Performance results running fio (72 jobs, 128 iodepth)
using null_blk (w/w.o patch):

bs      IOPS(read submit_queues=72)   IOPS(write submit_queues=72)   IOPS(read submit_queues=24)  IOPS(write submit_queues=24)
-----  ----------------------------  ------------------------------ ---------------------------- -----------------------------
512    4890.4K/4723.5K                 4524.7K/4324.2K                   4280.2K/4264.3K               3902.4K/3909.5K
1k     4910.1K/4715.2K                 4535.8K/4309.6K                   4296.7K/4269.1K               3906.8K/3914.9K
2k     4906.3K/4739.7K                 4526.7K/4330.6K                   4301.1K/4262.4K               3890.8K/3900.1K
4k     4918.6K/4730.7K                 4556.1K/4343.6K                   4297.6K/4264.5K               3886.9K/3893.9K
8k     4906.4K/4748.9K                 4550.9K/4346.7K                   4283.2K/4268.8K               3863.4K/3858.2K
16k    4903.8K/4782.6K                 4501.5K/4233.9K                   4292.3K/4282.3K               3773.1K/3773.5K
32k    4885.8K/4782.4K                 4365.9K/4184.2K                   4307.5K/4289.4K               3780.3K/3687.3K
64k    4822.5K/4762.7K                 2752.8K/2675.1K                   4308.8K/4312.3K               2651.5K/2655.7K
128k   2388.5K/2313.8K                 1391.9K/1375.7K                   2142.8K/2152.2K               1395.5K/1374.2K

Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-06-29 08:40:11 -06:00
arch
Merge commit '8e8320c9315c' into for-4.13/block
2017-06-22 21:55:24 -06:00
block
blk-mq: map all HWQ also in hyperthreaded system
2017-06-29 08:40:11 -06:00
certs
scripts/spelling.txt: add "intialise(d)" pattern and fix typo instances
2017-05-08 17:15:13 -07:00
crypto
crypto : asymmetric_keys : verify_pefile:zero memory content before freeing
2017-06-09 13:29:50 +10:00
Documentation
block: remove bio_clone() and all references.
2017-06-18 12:40:59 -06:00
drivers
nvmet-rdma: register ib_client to not deadlock in device removal
2017-06-28 08:14:13 -06:00
firmware
firmware/Makefile: force recompilation if makefile changes
2017-05-08 17:15:10 -07:00
fs
fs/fcntl: use copy_to/from_user() for u64 types
2017-06-28 08:09:45 -06:00
include
nvme: use a single NVME_AQ_DEPTH and relax it to 32
2017-06-28 08:14:13 -06:00
init
Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-05-10 10:30:46 -07:00
ipc
mm: introduce kv[mz]alloc helpers
2017-05-08 17:15:12 -07:00
kernel
Merge branch 'uuid-types' of bombadil.infradead.org:public_git/uuid into nvme-base
2017-06-13 11:45:14 +02:00
lib
scatterlist: add sg_zero_buffer() helper
2017-06-15 14:30:14 +02:00
mm
fs: return if direct I/O will trigger writeback
2017-06-20 07:12:03 -06:00
net
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2017-06-06 14:30:17 -07:00
samples
samples/bpf: run cleanup routines when receiving SIGTERM
2017-05-11 21:43:30 -04:00
scripts
scripts/gdb: make lx-dmesg command work (reliably)
2017-06-02 15:07:38 -07:00
security
Merge branch 'uuid-types' of bombadil.infradead.org:public_git/uuid into nvme-base
2017-06-13 11:45:14 +02:00
sound
Merge branch 'uuid-types' of bombadil.infradead.org:public_git/uuid into nvme-base
2017-06-13 11:45:14 +02:00
tools
Merge branch 'uuid-types' of bombadil.infradead.org:public_git/uuid into nvme-base
2017-06-13 11:45:14 +02:00
usr
initramfs: fix disabling of initramfs (and its compression)
2017-06-02 15:07:37 -07:00
virt
KVM: arm/arm64: Handle possible NULL stage2 pud when ageing pages
2017-06-06 15:28:40 +02:00
.cocciconfig
scripts: add Linux .cocciconfig for coccinelle
2016-07-22 12:13:39 +02:00
.get_maintainer.ignore
…
.gitattributes
.gitattributes: set git diff driver for C source code files
2016-10-07 18:46:30 -07:00
.gitignore
kbuild: Add support to generate LLVM assembly files
2017-04-25 08:13:52 +09:00
.mailmap
power supply and reset changes for the v4.12 series (part 2)
2017-05-12 12:02:21 -07:00
COPYING
…
CREDITS
avr32: remove support for AVR32 architecture
2017-05-01 09:27:15 +02:00
Kbuild
kbuild: Consolidate header generation from ASM offset information
2017-04-13 05:43:37 +09:00
Kconfig
…
MAINTAINERS
Merge branch 'uuid-types' of bombadil.infradead.org:public_git/uuid into nvme-base
2017-06-13 11:45:14 +02:00
Makefile
Linux 4.12-rc5
2017-06-11 16:48:20 -07:00
README
README: add a new README file, pointing to the Documentation/
2016-10-24 08:12:35 -02:00

README 

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.
Description
No description provided
Readme 5.7 GiB
Languages
C 97.6%
Assembly 1%
Shell 0.5%
Python 0.3%
Makefile 0.3%