Re: [eigen] Help needed to run a benchmark on many machines |

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*To*: eigen <eigen@xxxxxxxxxxxxxxxxxxx>*Subject*: Re: [eigen] Help needed to run a benchmark on many machines*From*: Benoit Jacob <jacob.benoit.1@xxxxxxxxx>*Date*: Wed, 18 Feb 2015 15:48:40 -0500*Dkim-signature*: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=uzVh1oNSSLuVDOuqCV6UOmmSAQIdI3RXYVBE1WWHPJ0=; b=wJpnUpGkmyifRvzWXN2g7HmgYrz63K3hIYAQ8J61E6vnMBbg1r4I93+My+9a6Pmg3U UJ9qkYbcKjBQzQSRqbiuUNDSqyOdBNsN6qRRJY8OOtg4iNjmqvXRaT1fICqpo/xtBusL lCVMQO6x9J/X5OdrDcVc5X9iA+B54oVnfBajp7qcUNTRk6NHjajYMlezfnYLkXQkyV2W sc5L9xWWU+BAlWAnwal2KqUocUC7lf5AqQKngwMuPaY/pzruZgyNOWUfQeC3AhY4EwAo h3WkJGtjzyQT/HZ7NFqw/ZQg/Mc3qhKqqyKCGnFapmydDnFZpvRXcc3MRD8euvAnMycQ qd2w==

2015-02-18 15:47 GMT-05:00 Hauke Heibel <hauke.heibel@xxxxxxxxx>:

On Wed, Feb 18, 2015 at 9:37 PM, Benoit Jacob <jacob.benoit.1@xxxxxxxxx> wrote:

>> c) Do we actually need to test user CPU times as opposed to wall times?

>

>

> Probably not - do you have an opinion on this?

Not really, my (most likely) naive assumption was that user cpu times

might reduce noise (caused e.g. by OS thread scheduling on system with

multiple cores and hyperthreading).

Same here. So when I can easily get cpu time, I use it, and otherwise (on Mac) i just use gettimeofday and (given enough repetitions of measurements) this works well enough.

Benoit

**References**:**[eigen] Help needed to run a benchmark on many machines***From:*Benoit Jacob

**Re: [eigen] Help needed to run a benchmark on many machines***From:*Hauke Heibel

**Re: [eigen] Help needed to run a benchmark on many machines***From:*Benoit Jacob

**Re: [eigen] Help needed to run a benchmark on many machines***From:*Hauke Heibel

**Re: [eigen] Help needed to run a benchmark on many machines***From:*Benoit Jacob

**Re: [eigen] Help needed to run a benchmark on many machines***From:*Hauke Heibel

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