From: Nathan Chancellor <nathan@kernel.org>
To: Rong Xu <xur@google.com>
Cc: Alice Ryhl <aliceryhl@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
Arnd Bergmann <arnd@arndb.de>, Bill Wendling <morbo@google.com>,
Borislav Petkov <bp@alien8.de>, Breno Leitao <leitao@debian.org>,
Brian Gerst <brgerst@gmail.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
David Li <davidxl@google.com>, Han Shen <shenhan@google.com>,
Heiko Carstens <hca@linux.ibm.com>,
"H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>,
Jann Horn <jannh@google.com>, Jonathan Corbet <corbet@lwn.net>,
Josh Poimboeuf <jpoimboe@kernel.org>,
Juergen Gross <jgross@suse.com>,
Justin Stitt <justinstitt@google.com>,
Kees Cook <kees@kernel.org>,
Masahiro Yamada <masahiroy@kernel.org>,
"Mike Rapoport (IBM)" <rppt@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Nicolas Schier <nicolas@fjasle.eu>,
"Paul E. McKenney" <paulmck@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Sami Tolvanen <samitolvanen@google.com>,
Thomas Gleixner <tglx@linutronix.de>,
Wei Yang <richard.weiyang@gmail.com>,
workflows@vger.kernel.org,
Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>,
Maksim Panchenko <max4bolt@gmail.com>,
Yonghong Song <yonghong.song@linux.dev>,
Yabin Cui <yabinc@google.com>,
x86@kernel.org, linux-arch@vger.kernel.org,
linux-doc@vger.kernel.org, linux-kbuild@vger.kernel.org,
linux-kernel@vger.kernel.org, llvm@lists.linux.dev
Subject: Re: [PATCH v4 0/6] Add AutoFDO and Propeller support for Clang build
Date: Sat, 19 Oct 2024 20:25:23 -0700 [thread overview]
Message-ID: <20241020032523.GA3652325@thelio-3990X> (raw)
In-Reply-To: <CAF1bQ=SQ9rFdwRk_waQvn4PW7x6T1uJmJ8qNqj04oRKmujkCQw@mail.gmail.com>
Hi Rong,
On Fri, Oct 18, 2024 at 11:20:02PM -0700, Rong Xu wrote:
> Thanks to all for the feedback and suggestions! We are ready to make any further
> changes needed. Is there anything else we can address for this patch?
I will reply in a separate thread for visibility but I think one of the
biggest open questions at the moment is trying to find someone to
shepherd this code into mainline.
> Also, we know it's not easy to test this patch, but if anyone has had a chance
> to try building AutoFDO/Propeller kernels with it, we'd really appreciate your
> input here. Any confirmation that it works as expected would be very helpful.
I went to take this series for a spin in a virtual machine first as a
smoke test before attempting to boot on bare metal. This was done on a
server with an Intel Xeon Gold 6314U. The kernel booted fine but when I
went to run the command to generate the perf data from the
documentation, I get an error.
$ perf record -e BR_INST_RETIRED.NEAR_TAKEN:k -a -N -b -c 500009 -o /tmp/perf.data -- make -j$(nproc) O=out mrproper defconfig all
Error:
BR_INST_RETIRED.NEAR_TAKEN:k: PMU Hardware or event type doesn't support branch stack sampling.
Do you know if this is expected for a virtual machine setup? I will
attempt to test the series on real hardware here soon, it is currently
tied up with investigating a regression in -next at the moment.
Cheers,
Nathan
next prev parent reply other threads:[~2024-10-20 3:25 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-14 21:33 Rong Xu
2024-10-14 21:33 ` [PATCH v4 1/6] Add AutoFDO " Rong Xu
2024-10-20 16:32 ` Masahiro Yamada
2024-10-21 22:43 ` Rong Xu
2024-10-23 6:44 ` Masahiro Yamada
2024-10-14 21:33 ` [PATCH v4 2/6] objtool: Fix unreachable instruction warnings for weak funcitons Rong Xu
2024-10-14 21:33 ` [PATCH v4 3/6] Change the symbols order when --ffuntion-sections is enabled Rong Xu
2024-10-21 2:15 ` Masahiro Yamada
2024-10-21 23:43 ` Rong Xu
2024-10-23 6:48 ` Masahiro Yamada
2024-10-14 21:33 ` [PATCH v4 4/6] AutoFDO: Enable -ffunction-sections for the AutoFDO build Rong Xu
2024-10-21 2:25 ` Masahiro Yamada
2024-10-21 23:32 ` Rong Xu
2024-10-23 6:49 ` Masahiro Yamada
2024-10-14 21:33 ` [PATCH v4 5/6] AutoFDO: Enable machine function split optimization for AutoFDO Rong Xu
2024-10-21 3:18 ` Masahiro Yamada
2024-10-21 23:28 ` Rong Xu
2024-10-23 6:49 ` Masahiro Yamada
2024-10-23 16:24 ` Rong Xu
2024-10-14 21:33 ` [PATCH v4 6/6] Add Propeller configuration for kernel build Rong Xu
2024-10-20 17:48 ` Masahiro Yamada
2024-10-22 0:00 ` Rong Xu
2024-10-23 7:06 ` Masahiro Yamada
2024-10-23 7:25 ` Arnd Bergmann
2024-10-23 7:28 ` Masahiro Yamada
2024-10-23 16:23 ` Rong Xu
2024-10-19 6:20 ` [PATCH v4 0/6] Add AutoFDO and Propeller support for Clang build Rong Xu
2024-10-20 3:20 ` Yonghong Song
2024-10-20 3:25 ` Nathan Chancellor [this message]
2024-10-21 21:12 ` Rong Xu
2024-10-20 3:31 ` Nathan Chancellor
2024-10-20 15:45 ` Masahiro Yamada
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