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Subject: Re: last snapshot is not better than previous version
From: Denis Excoffier <cygwin AT Denis-Excoffier DOT org>
In-Reply-To: <20160530082547.GB12694@calimero.vinschen.de>
Date: Mon, 30 May 2016 19:00:02 +0200
Message-Id: <6FE1A983-9CCD-4010-99DE-FEAA0BA6749E@Denis-Excoffier.org>
References: <90DB300A-9605-4E19-BEFC-AFBFB5240C0E AT Denis-Excoffier DOT org> <20160530082547 DOT GB12694 AT calimero DOT vinschen DOT de>
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> On 2016-05-30 10:25, Corinna Vinschen wrote:
> 
> 
> The problem is, there's no change at all in the snapshot which would
> explain a slowdown of such basic functions:
> 
> - Assorted select(2) improvements:
> 
>  commits a23e6a35d896a075640db714b28ce74bb6b8d7ff
>          e5665d8c930485d5ac6d8913573e27b9e5043d92

Thank you for your answer. However, i do insist.
I use again the file created with "seq 10000 > 10k" and still
look-up the string "9999" inside it. 

I perform:
strace -o vi.out /usr/bin/vim 10k 
and inside vi: 
:0
/9999
:q

Without snapshot, vi.out contains 15133 lines
With snapshot, vi.out contains 426553 lines. Huh?

Without snapshot, the 6 lines:
------------------------------
select: sel.always_ready 0
select: sel.wait returns 0
select_stuff::cleanup: calling cleanup routines
select_stuff::destroy: deleting select records
select: recalculating ms
select: ms now 0
------------------------------
occur about 450 times

With snapshot, the 6 lines:
------------------------------
select: sel.always_ready 0
select: sel.wait returns 0
select_stuff::cleanup: calling cleanup routines
select_stuff::destroy: deleting select records
select: recalculating us
select: us now 0
------------------------------
occur more than 69000 times

Something is probably wrong near here. Please tell me what i should experiment next.

Al least i have found a wrong line in select.cc: line 4, the copyright year is missing. ;-)


Regards,

Denis Excoffier.


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