Re: [9fans] Re: /proc/n/status's memory field

[Kyohei Kadota <lufia@lufia.org>]

Thanks.

I've misread Labs kernel's initial index to zero until now.

2020年8月15日(土) 13:51 Anthony Martin <ality@pbrane.org>:
>
> Kyohei Kadota <lufia@lufia.org> once said:
> > I'm reading proc(3). It describes the status file:
> >
> > > the amount of memory used by the process, except its stack, in units of 1024 bytes
> >
> > In /sys/src/9/pc/port/proc.c, it seems to me that procread sums all
> > segment's size for that.
> > Is the above statement correct?
>
> The Labs kernel loops over [1,NSEG) to sum the segment sizes.
> The index of the stack segment, SSEG, is zero so it is skipped.
> This measurement is the total virtual address space in use by
> the process minus the stack.
>
> The 9front kernel loops over [0,NSEG) to scan the virtual page
> table of each segment for used pages, summing as it goes. This
> measurement is the total amount of memory in use by the process.
>
> Cheers,
>   Anthony
>
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