qume performance measure

[TaiJuWu]

I want to test my code performance for nuttx.
Is it available test on QEMU?

I attempted use os perf but pipe2 does not work for qemu-armv8a:nsh_smp
Is it resolved? Or I must measure performance on real hardware?

The osperf always trigger memory dump and I don't find any documentation about it.
Can anyone give me some suggestion?

[xiaoxiang781216]

I want to test my code for nuttx. Is it available test on QEMU?

Yes.

I attempted use os perf but pipe2 does not work for qemu-armv8a:nsh_smp Is it resolved?

what' problem?

Or I must measure performance on real hardware?

it's always better to meaure on the real hardware.

The osperf always trigger memory dump and I don't find any documentation about it. Can anyone give me some suggestion?

@Gary-Hobson could you take a look?

[TaiJuWu]

I want to test my code for nuttx. Is it available test on QEMU?

Yes.

I attempted use os perf but pipe2 does not work for qemu-armv8a:nsh_smp Is it resolved?

what' problem?

Or I must measure performance on real hardware?

it's always better to meaure on the real hardware.

The osperf always trigger memory dump and I don't find any documentation about it. Can anyone give me some suggestion?

@Gary-Hobson could you take a look?

When I use QEMU to measure performance the time looks incorrect, even only pass 1s on real world but the result shows 14s.

So I’m not sure this behavior is available and I have attempted to find the answer but failed.

[Gary-Hobson]

I want to test my code for nuttx. Is it available test on QEMU?

Yes.

I attempted use os perf but pipe2 does not work for qemu-armv8a:nsh_smp Is it resolved?

what' problem?

Or I must measure performance on real hardware?

it's always better to meaure on the real hardware.

The osperf always trigger memory dump and I don't find any documentation about it. Can anyone give me some suggestion?

@Gary-Hobson could you take a look?

When I use QEMU to measure performance the time looks incorrect, even only pass 1s on real world but the result shows 14s.

So I’m not sure this behavior is available and I have attempted to find the answer but failed.

There were some issues running on arm64 which I have fixed
I also found that the time you mentioned is incorrect. I am analyzing the reasons now and may have results later.

[TaiJuWu]

I want to test my code for nuttx. Is it available test on QEMU?

Yes.

I attempted use os perf but pipe2 does not work for qemu-armv8a:nsh_smp Is it resolved?

what' problem?

Or I must measure performance on real hardware?

it's always better to meaure on the real hardware.

The osperf always trigger memory dump and I don't find any documentation about it. Can anyone give me some suggestion?

@Gary-Hobson could you take a look?

When I use QEMU to measure performance the time looks incorrect, even only pass 1s on real world but the result shows 14s.
So I’m not sure this behavior is available and I have attempted to find the answer but failed.

There were some issues running on arm64 which I have fixed I also found that the time you mentioned is incorrect. I am analyzing the reasons now and may have results later.

Thanks a lot.

[Gary-Hobson]

@TaiJuWu You can use this PR(apache/nuttx-apps#2085) to resolve runtime errors.

The time display error is due to the fact that in SMP mode, the time obtained by different CPUs through up_perf_gettime is not synchronized, and end may be smaller than start, resulting in time errors.

And you need to enable the following configuration

CONFIG_DEBUG_SCHED_INFO=n
CONFIG_PIPES=y
CONFIG_TESTING_OSPERF=y