From: Segher Boessenkool <segher@kernel.crashing.org>
To: Mukesh Kumar Chaurasiya <mkchauras@linux.ibm.com>
Cc: maddy@linux.ibm.com, mpe@ellerman.id.au, npiggin@gmail.com,
christophe.leroy@csgroup.eu, oleg@redhat.com, kees@kernel.org,
luto@amacapital.net, wad@chromium.org, mchauras@linux.ibm.com,
thuth@redhat.com, sshegde@linux.ibm.com, charlie@rivosinc.com,
macro@orcam.me.uk, akpm@linux-foundation.org, ldv@strace.io,
deller@gmx.de, ankur.a.arora@oracle.com, tglx@linutronix.de,
thomas.weissschuh@linutronix.de, peterz@infradead.org,
menglong8.dong@gmail.com, bigeasy@linutronix.de,
namcao@linutronix.de, kan.liang@linux.intel.com,
mingo@kernel.org, atrajeev@linux.vnet.ibm.com,
mark.barnett@arm.com, linuxppc-dev@lists.ozlabs.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 8/8] powerpc: Enable Generic Entry/Exit for syscalls.
Date: Sun, 14 Dec 2025 10:20:12 -0600 [thread overview]
Message-ID: <aT7jvN1u8P7XxQIW@gate> (raw)
In-Reply-To: <20251214130245.43664-9-mkchauras@linux.ibm.com>
Hi!
On Sun, Dec 14, 2025 at 06:32:44PM +0530, Mukesh Kumar Chaurasiya wrote:
>
> | Test | With Patch | Without Patch | % Change |
> | --------------- | ---------- | ------------- | -------- |
> | fork usec/op | 833.986 | 814.809 | +2.35% |
What causes this regression, did you investigate? Maybe there is
something simple you can do to avoid this degradation :-) All other
numbers look just fine :-)
> | Test | With Patch | Without Patch | % Change |
> | --------------- | ---------- | ------------- | -------- |
> | fork ops/sec | 1,199 | 1,227 | -2.28% |
(Same thing seen from another side)
Segher
next prev parent reply other threads:[~2025-12-14 16:21 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-14 13:02 [PATCH v2 0/8] Generic IRQ entry/exit support for powerpc Mukesh Kumar Chaurasiya
2025-12-14 13:02 ` [PATCH v2 1/8] powerpc: rename arch_irq_disabled_regs Mukesh Kumar Chaurasiya
2025-12-14 13:02 ` [PATCH v2 2/8] powerpc: Prepare to build with generic entry/exit framework Mukesh Kumar Chaurasiya
2025-12-16 9:27 ` Christophe Leroy (CS GROUP)
2025-12-16 14:42 ` Mukesh Kumar Chaurasiya
2025-12-14 13:02 ` [PATCH v2 3/8] powerpc: introduce arch_enter_from_user_mode Mukesh Kumar Chaurasiya
2025-12-16 9:38 ` Christophe Leroy (CS GROUP)
2025-12-16 14:47 ` Mukesh Kumar Chaurasiya
2025-12-14 13:02 ` [PATCH v2 4/8] powerpc: Introduce syscall exit arch functions Mukesh Kumar Chaurasiya
2025-12-16 9:46 ` Christophe Leroy (CS GROUP)
2025-12-16 14:51 ` Mukesh Kumar Chaurasiya
2025-12-14 13:02 ` [PATCH v2 5/8] powerpc: add exit_flags field in pt_regs Mukesh Kumar Chaurasiya
2025-12-16 9:52 ` Christophe Leroy (CS GROUP)
2025-12-16 14:56 ` Mukesh Kumar Chaurasiya
2025-12-14 13:02 ` [PATCH v2 6/8] powerpc: Prepare for IRQ entry exit Mukesh Kumar Chaurasiya
2025-12-16 9:58 ` Christophe Leroy (CS GROUP)
2025-12-16 15:00 ` Mukesh Kumar Chaurasiya
2025-12-16 22:40 ` Christophe Leroy (CS GROUP)
2025-12-17 4:43 ` Mukesh Kumar Chaurasiya
2025-12-19 4:56 ` Mukesh Kumar Chaurasiya
2025-12-14 13:02 ` [PATCH v2 7/8] powerpc: Enable IRQ generic entry/exit path Mukesh Kumar Chaurasiya
2025-12-16 6:29 ` kernel test robot
2025-12-16 15:02 ` Mukesh Kumar Chaurasiya
2025-12-16 10:43 ` Christophe Leroy (CS GROUP)
2025-12-16 15:06 ` Mukesh Kumar Chaurasiya
2025-12-17 2:10 ` kernel test robot
2025-12-17 21:32 ` kernel test robot
2025-12-14 13:02 ` [PATCH v2 8/8] powerpc: Enable Generic Entry/Exit for syscalls Mukesh Kumar Chaurasiya
2025-12-14 16:20 ` Segher Boessenkool [this message]
2025-12-15 18:32 ` Mukesh Kumar Chaurasiya
2025-12-15 20:27 ` kernel test robot
2025-12-16 15:08 ` Mukesh Kumar Chaurasiya
2025-12-16 22:57 ` Christophe Leroy (CS GROUP)
2025-12-16 6:41 ` Christophe Leroy (CS GROUP)
2025-12-16 15:09 ` Mukesh Kumar Chaurasiya
2025-12-16 11:01 ` Christophe Leroy (CS GROUP)
2025-12-16 15:13 ` Mukesh Kumar Chaurasiya
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