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Re: Emulate Rpi with QEMU fails
From: |
Alex Bennée |
Subject: |
Re: Emulate Rpi with QEMU fails |
Date: |
Fri, 09 Oct 2020 07:20:43 +0100 |
User-agent: |
mu4e 1.5.5; emacs 28.0.50 |
Thomas <74cmonty@gmail.com> writes:
> Interesting enough is: my top figure reported by perf is like yours:
>
> Samples: 6M of event 'cycles:u', Event count (approx.): 1936571734942
> Overhead Command Shared Object Symbol
> 7,95% qemu-system-arm qemu-system-arm [.]
> helper_lookup_tb_ptr
> ◆
> 4,16% qemu-system-arm qemu-system-arm [.]
> cpu_get_tb_cpu_state
> ▒
Not quite - cpu_get_tb_state should be a fair bit cheaper now since the
optimisations to hflags where introduced.
> 2,52% qemu-system-arm libpthread-2.32.so [.]
> __pthread_mutex_lock
> ▒
This indicated there is some lock contention. The QSP profiler can
help here.
Are you running the latest state of master?
--
Alex Bennée
- Re: Emulate Rpi with QEMU fails, (continued)
- Re: Emulate Rpi with QEMU fails, Alex Bennée, 2020/10/06
- Re: Emulate Rpi with QEMU fails, Thomas, 2020/10/07
- Re: Emulate Rpi with QEMU fails, Paul Zimmerman, 2020/10/07
- Re: Emulate Rpi with QEMU fails, Thomas Schneider, 2020/10/07
- Re: Emulate Rpi with QEMU fails, Alex Bennée, 2020/10/07
- Re: Emulate Rpi with QEMU fails, Thomas Schneider, 2020/10/07
- Re: Emulate Rpi with QEMU fails, Alex Bennée, 2020/10/07
- Re: Emulate Rpi with QEMU fails, Thomas, 2020/10/08
- Re: Emulate Rpi with QEMU fails, Paul Zimmerman, 2020/10/08
- Re: Emulate Rpi with QEMU fails, Paul Zimmerman, 2020/10/08
- Re: Emulate Rpi with QEMU fails,
Alex Bennée <=