From: David Howells <dhowells@redhat.com>
To: Borislav Petkov <bp@alien8.de>
Cc: dhowells@redhat.com,
Linus Torvalds <torvalds@linux-foundation.org>,
kernel test robot <oliver.sang@intel.com>,
oe-lkp@lists.linux.dev, lkp@intel.com,
linux-kernel@vger.kernel.org,
Christian Brauner <brauner@kernel.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Jens Axboe <axboe@kernel.dk>, Christoph Hellwig <hch@lst.de>,
Christian Brauner <christian@brauner.io>,
Matthew Wilcox <willy@infradead.org>,
David Laight <David.Laight@aculab.com>,
ying.huang@intel.com, feng.tang@intel.com, fengwei.yin@intel.com
Subject: Re: [linus:master] [iov_iter] c9eec08bac: vm-scalability.throughput -16.9% regression
Date: Thu, 16 Nov 2023 16:44:06 +0000 [thread overview]
Message-ID: <232440.1700153046@warthog.procyon.org.uk> (raw)
In-Reply-To: <20231116154406.GDZVY4xmFvRQt0wGGE@fat_crate.local>
Borislav Petkov <bp@alien8.de> wrote:
> diff --git a/Makefile b/Makefile
> index ede0bd241056..94d93070d54a 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -996,6 +996,8 @@ endif
> # change __FILE__ to the relative path from the srctree
> KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
>
> +KBUILD_CFLAGS += $(call cc-option,-mstringop-strategy=libcall)
> +
> # include additional Makefiles when needed
> include-y := scripts/Makefile.extrawarn
> include-$(CONFIG_DEBUG_INFO) += scripts/Makefile.debug
If you wanted this patch trying, I get the following numbers:
iov_kunit_benchmark_bvec: avg 9950 uS, stddev 40 uS
iov_kunit_benchmark_bvec: avg 9950 uS, stddev 53 uS
iov_kunit_benchmark_bvec: avg 9973 uS, stddev 69 uS
iov_kunit_benchmark_bvec_split: avg 9793 uS, stddev 28 uS
iov_kunit_benchmark_bvec_split: avg 9800 uS, stddev 41 uS
iov_kunit_benchmark_bvec_split: avg 9804 uS, stddev 16 uS
iov_kunit_benchmark_kvec: avg 10122 uS, stddev 4403 uS
iov_kunit_benchmark_kvec: avg 9757 uS, stddev 1516 uS
iov_kunit_benchmark_kvec: avg 9909 uS, stddev 2694 uS
iov_kunit_benchmark_xarray: avg 10526 uS, stddev 52 uS
iov_kunit_benchmark_xarray: avg 10529 uS, stddev 48 uS
iov_kunit_benchmark_xarray: avg 10532 uS, stddev 63 uS
iov_kunit_benchmark_xarray_to_bvec: avg 10468 uS, stddev 23 uS
iov_kunit_benchmark_xarray_to_bvec: avg 10469 uS, stddev 157 uS
iov_kunit_benchmark_xarray_to_bvec: avg 10471 uS, stddev 163 uS
I'm using the 6 patches here:
https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/log/?h=iov-kunit
Set CONFIG_TEST_IOV_ITER=m and then load the kunit_iov_iter.ko module. It'll
dump its benchmarks to dmesg.
David
next prev parent reply other threads:[~2023-11-16 16:44 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-07 1:40 [linus:master] [iov_iter] c9eec08bac: vm-scalability.throughput -16.9% regression kernel test robot
2023-11-15 12:48 ` David Howells
2023-11-15 13:18 ` David Howells
2023-11-15 15:20 ` David Howells
2023-11-15 16:53 ` Linus Torvalds
2023-11-15 17:38 ` Linus Torvalds
2023-11-15 18:35 ` David Howells
2023-11-15 18:45 ` Linus Torvalds
2023-11-15 19:09 ` Linus Torvalds
2023-11-15 20:54 ` David Howells
2023-11-15 18:38 ` Linus Torvalds
2023-11-15 19:09 ` Borislav Petkov
2023-11-15 19:15 ` Linus Torvalds
2023-11-15 20:07 ` Linus Torvalds
2023-11-16 10:07 ` David Laight
2023-11-16 10:14 ` David Howells
2023-11-16 11:38 ` David Laight
2023-11-15 19:26 ` Linus Torvalds
2023-11-16 15:44 ` Borislav Petkov
2023-11-16 16:44 ` David Howells [this message]
2023-11-17 11:35 ` Borislav Petkov
2023-11-17 14:12 ` David Howells
2023-11-17 16:09 ` Borislav Petkov
2023-11-17 16:32 ` Linus Torvalds
2023-11-17 16:44 ` Linus Torvalds
2023-11-17 19:12 ` Borislav Petkov
2023-11-17 21:57 ` Linus Torvalds
2023-11-20 13:32 ` David Howells
2023-11-20 16:06 ` Linus Torvalds
2023-11-20 16:09 ` David Laight
2023-11-16 16:48 ` Linus Torvalds
2023-11-16 16:58 ` David Laight
2023-11-17 11:44 ` Borislav Petkov
2023-11-17 12:09 ` Jakub Jelinek
2023-11-17 12:18 ` Borislav Petkov
2023-11-17 13:09 ` David Laight
2023-11-17 13:36 ` Linus Torvalds
2023-11-17 15:20 ` David Laight
2023-11-15 21:43 ` David Howells
2023-11-15 21:50 ` Linus Torvalds
2023-11-15 21:59 ` Borislav Petkov
2023-11-15 22:59 ` David Howells
2023-11-16 3:26 ` Linus Torvalds
2023-11-16 16:55 ` David Laight
2023-11-16 17:24 ` Linus Torvalds
2023-11-16 22:53 ` David Laight
2023-11-16 21:09 ` David Howells
2023-11-16 22:36 ` Linus Torvalds
2023-11-20 11:52 ` Borislav Petkov
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