From: Richard Henderson <richard.henderson@linaro.org>
To: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>,
David Gibson <david@gibson.dropbear.id.au>,
BALATON Zoltan <balaton@eik.bme.hu>
Cc: qemu-ppc@nongnu.org, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [Qemu-ppc] [RFC PATCH 0/6] target/ppc: convert VMX instructions to use TCG vector operations
Date: Tue, 11 Dec 2018 15:32:11 -0600 [thread overview]
Message-ID: <b9b3f1b9-4bda-9f32-8c36-e374d90fb0f1@linaro.org> (raw)
In-Reply-To: <7bcfc7ae-7777-e1e5-d1a4-36c2d958b845@ilande.co.uk>
On 12/11/18 1:35 PM, Mark Cave-Ayland wrote:
> Looking at your profiles above, the primary hotspot appears to be
> helper_lookup_tb_ptr(). However as someone quite new to the TCG parts of QEMU, I
> couldn't tell you whether or not this is to be expected.
>
> Perhaps a question for Richard: what could we consider to be a "normal" backend when
> looking at profiles in terms of recommended features to implement, and to get an idea
> of what a typical profile should look like?
>
> It would be interesting to compare with a similar workload profile on e.g. ARM to see
> if there is anything obvious that stands out for PPC.
For Alpha, which has relatively sane tlb management, the top entry in the
profile is helper_lookup_tb_ptr at about 8%. Otherwise, somewhere in the top 2
or 3 functions will be helper_le_ldq_mmu at about 2%.
That's probably a best-case scenario.
r~
next prev parent reply other threads:[~2018-12-11 21:32 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-07 8:56 [Qemu-devel] [RFC PATCH 0/6] target/ppc: convert VMX instructions to use TCG vector operations Mark Cave-Ayland
2018-12-07 8:56 ` [Qemu-devel] [RFC PATCH 1/6] target/ppc: introduce get_fpr() and set_fpr() helpers for FP register access Mark Cave-Ayland
2018-12-10 5:17 ` David Gibson
2018-12-10 18:25 ` Richard Henderson
2018-12-11 0:23 ` David Gibson
2018-12-11 19:06 ` Mark Cave-Ayland
2018-12-10 18:43 ` Richard Henderson
2018-12-11 19:15 ` Mark Cave-Ayland
2018-12-07 8:56 ` [Qemu-devel] [RFC PATCH 2/6] target/ppc: introduce get_avr64() and set_avr64() helpers for VMX " Mark Cave-Ayland
2018-12-10 18:49 ` Richard Henderson
2018-12-11 19:16 ` Mark Cave-Ayland
2018-12-07 8:56 ` [Qemu-devel] [RFC PATCH 3/6] target/ppc: introduce get_cpu_vsr{l, h}() and set_cpu_vsr{l, h}() helpers for VSR " Mark Cave-Ayland
2018-12-10 19:16 ` Richard Henderson
2018-12-11 19:24 ` Mark Cave-Ayland
2018-12-07 8:56 ` [Qemu-devel] [RFC PATCH 4/6] target/ppc: switch FPR, VMX and VSX helpers to access data directly from cpu_env Mark Cave-Ayland
2018-12-10 19:05 ` Richard Henderson
2018-12-11 19:21 ` Mark Cave-Ayland
2018-12-11 21:24 ` Richard Henderson
2018-12-07 8:56 ` [Qemu-devel] [RFC PATCH 5/6] target/ppc: convert VMX logical instructions to use vector operations Mark Cave-Ayland
2018-12-10 19:08 ` Richard Henderson
2018-12-07 8:56 ` [Qemu-devel] [RFC PATCH 6/6] target/ppc: convert vaddu[b, h, w, d] and vsubu[b, h, w, d] over " Mark Cave-Ayland
2018-12-10 19:09 ` Richard Henderson
2018-12-10 0:33 ` [Qemu-devel] [Qemu-ppc] [RFC PATCH 0/6] target/ppc: convert VMX instructions to use TCG " BALATON Zoltan
2018-12-10 2:59 ` David Gibson
2018-12-10 20:54 ` BALATON Zoltan
2018-12-10 21:09 ` Richard Henderson
2018-12-10 23:01 ` BALATON Zoltan
2018-12-11 1:20 ` David Gibson
2018-12-11 3:03 ` BALATON Zoltan
2018-12-11 19:35 ` Mark Cave-Ayland
2018-12-11 21:32 ` Richard Henderson [this message]
2018-12-10 13:04 ` [Qemu-devel] " Aleksandar Markovic
2018-12-11 19:11 ` Mark Cave-Ayland
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