This recently came up again. It seems that `+RTS -h -i0` will just turn
every minor collection into a major one:
https://gitlab.haskell.org/ghc/ghc/issues/17387#note_248705
`-i0` seems significantly different from `-i0.001`, say, in that it just
turns minor GCs into major ones and doesn't
https://phabricator.haskell.org/D5428
On Sun, 9 Dec 2018 at 10:12, Sebastian Graf wrote:
> Ah, I was only looking at `+RTS --help`, not the users guide. Silly me.
>
> Am Do., 6. Dez. 2018 um 20:53 Uhr schrieb Simon Marlow >:
>
>> It is documented!
>>
Ah, I was only looking at `+RTS --help`, not the users guide. Silly me.
Am Do., 6. Dez. 2018 um 20:53 Uhr schrieb Simon Marlow :
> It is documented!
> https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/runtime_control.html#rts-flag--F%20%E2%9F%A8factor%E2%9F%A9
>
> On Thu, 6 Dec
It is documented!
https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/runtime_control.html#rts-flag--F%20%E2%9F%A8factor%E2%9F%A9
On Thu, 6 Dec 2018 at 16:21, Sebastian Graf wrote:
> Hey,
>
> thanks, all! Measuring with `-A1M -F1` delivers much more reliable
> residency numbers.
>
Hey,
thanks, all! Measuring with `-A1M -F1` delivers much more reliable
residency numbers.
`-F` doesn't seem to be documented. From reading `rts/RtsFlags.c` and
`rts/sm/GC.c` I gather that it's the factor by which to multiply the number
of live bytes by to get the new old gen size?
So
| Right. A parameter for fixing the nursery size would be easy to implement,
| I think. Just a new flag, then in GC.c:resize_nursery() use the flag as the
| nursery size.
Super! That would be v useful.
| "Max. residency" is really hard to measure (need to do very frequent GCs),
| perhaps a
//ghc.haskell.org/trac/ghc/ticket/9476,
Sebastian has been a bit flummoxed by the task of measure residency profiles;
that is, how much data is truly live during execution.
A major GC measures that, but we are vulnerable to exactly when it happens (even
with -G1) and that can lead to irreprod
Simon, Ben, Omer
As you'll see in comments 55-72 of
https://ghc.haskell.org/trac/ghc/ticket/9476, Sebastian has been a bit
flummoxed by the task of measure residency profiles; that is, how much data is
truly live during execution.
A major GC measures that, but we are vulnerable to exactly when
