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Subject: Re: [OMPI devel] RFC: optimize probe in ob1
From: Dave Goodell (dgoodell) (dgoodell_at_[hidden])
Date: 2014-02-19 11:37:41


On Feb 19, 2014, at 6:36 AM, George Bosilca <bosilca_at_[hidden]> wrote:

> There is one minor thing I would suggest to change. In your patch in_unexpected_list is defined as a bool, which translates to an int on most platforms.

This statement isn't true. sizeof(bool)==1 on my Mac and on our x86_64 Linux cluster at Cisco. I only mention it because this seems to be a common myth for some reason.

> You can change it to an uint8_t and move the in_unexpected_list field in the mca_pml_ob1_comm_proc_t to allow the compiler to pack it with the expected_sequence.

However, this is still a reasonable suggestion to ensure that we retain good control of our structure sizes/layouts.

-Dave