From: "Alex Bennée" <alex.bennee@linaro.org>
To: Thomas Schneider <74cmonty@gmail.com>
Cc: "Peter Maydell" <peter.maydell@linaro.org>,
"Philippe Mathieu-Daudé" <f4bug@amsat.org>,
"Andrew Baumann" <Andrew.Baumann@microsoft.com>,
"QEMU Developers" <qemu-devel@nongnu.org>,
qemu-arm <qemu-arm@nongnu.org>,
"Paul Zimmerman" <pauldzim@gmail.com>
Subject: Re: Emulate Rpi with QEMU fails
Date: Wed, 07 Oct 2020 13:02:30 +0100 [thread overview]
Message-ID: <87362q1bxl.fsf@linaro.org> (raw)
In-Reply-To: <f32593d0-e87b-0549-7b59-f58da24c9130@gmail.com>
Thomas Schneider <74cmonty@gmail.com> writes:
> Are you referring to this tool?
> https://github.com/stefano-garzarella/qemu-boot-time
> <https://github.com/stefano-garzarella/qemu-boot-time>
No - just plain perf:
perf record $QEMU $ARGS
Then a "perf report" which will show you the hotspots, for example:
8.92% qemu-system-aar qemu-system-aarch64 [.] helper_lookup_tb_ptr
4.76% qemu-system-aar qemu-system-aarch64 [.] liveness_pass_1
3.69% qemu-system-aar qemu-system-aarch64 [.] tcg_gen_code
2.95% qemu-system-aar qemu-system-aarch64 [.] qht_lookup_custom
2.93% qemu-system-aar qemu-system-aarch64 [.] tcg_optimize
1.28% qemu-system-aar qemu-system-aarch64 [.] tcg_out_opc.isra.15
1.09% qemu-system-aar qemu-system-aarch64 [.] get_phys_addr_lpae
1.09% qemu-system-aar [kernel.kallsyms] [k] isolate_freepages_block
1.05% qemu-system-aar qemu-system-aarch64 [.] cpu_get_tb_cpu_state
0.98% qemu-system-aar [kernel.kallsyms] [k] do_syscall_64
0.94% qemu-system-aar qemu-system-aarch64 [.] tb_lookup_cmp
0.78% qemu-system-aar qemu-system-aarch64 [.] init_ts_info
0.73% qemu-system-aar qemu-system-aarch64 [.] tb_htable_lookup
0.73% qemu-system-aar qemu-system-aarch64 [.] tb_gen_code
0.73% qemu-system-aar qemu-system-aarch64 [.] tlb_set_page_with_attrs
>
>
> Am 07.10.2020 um 13:00 schrieb Alex Bennée:
>> perf to record your boot
--
Alex Bennée
next prev parent reply other threads:[~2020-10-07 12:19 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-03 11:45 Emulate Rpi with QEMU fails Thomas
2020-10-04 17:44 ` Alex Bennée
2020-10-04 18:40 ` Peter Maydell
2020-10-05 9:40 ` Alex Bennée
2020-10-05 10:51 ` Thomas Schneider
2020-10-05 22:08 ` Paul Zimmerman
2020-10-06 6:58 ` Thomas Schneider
2020-10-06 7:42 ` Paul Zimmerman
2020-10-06 9:58 ` Alex Bennée
2020-10-07 6:28 ` Thomas
2020-10-07 6:50 ` Paul Zimmerman
2020-10-07 7:27 ` Thomas Schneider
2020-10-07 11:00 ` Alex Bennée
2020-10-07 11:36 ` Thomas Schneider
2020-10-07 12:02 ` Alex Bennée [this message]
2020-10-08 7:00 ` Thomas
2020-10-08 21:07 ` Paul Zimmerman
2020-10-09 2:21 ` Paul Zimmerman
2020-10-09 6:20 ` Alex Bennée
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