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Re: [PATCH 01/17] block/nvme: Avoid further processing if trace event no
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From: |
Stefan Hajnoczi |
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Subject: |
Re: [PATCH 01/17] block/nvme: Avoid further processing if trace event not enabled |
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Date: |
Fri, 26 Jun 2020 11:36:51 +0100 |
On Thu, Jun 25, 2020 at 08:48:22PM +0200, Philippe Mathieu-Daudé wrote:
> Avoid further processing if TRACE_NVME_SUBMIT_COMMAND_RAW is
> not enabled.
Why?
This saves 8 trace events, each with 8 arguments. I guess the intent is
to improve performance. Did you measure an improvement?
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- [PATCH 00/17] block/nvme: Various cleanups required to use multiple queues, Philippe Mathieu-Daudé, 2020/06/25
- [PATCH 02/17] block/nvme: Let nvme_create_queue_pair() fail gracefully, Philippe Mathieu-Daudé, 2020/06/25
- [PATCH 03/17] block/nvme: Define QUEUE_INDEX macros to ease code review, Philippe Mathieu-Daudé, 2020/06/25
- [PATCH 04/17] block/nvme: Be explicit we share NvmeIdCtrl / NvmeIdNs structures, Philippe Mathieu-Daudé, 2020/06/25
- [PATCH 05/17] block/nvme: Replace qemu_try_blockalign0 by qemu_try_blockalign/memset, Philippe Mathieu-Daudé, 2020/06/25