From: Eric Dumazet
> Sent: 26 May 2015 16:30
>
> > Yes, interesting, a benchmark that manages to run a lot of code 'cold
> > cache'.
>
> We have binaries here at Google with 400 or 500 MBytes of text.
>
> Not benchmark, super real workloads you know.
Indeed, and a lot of the code is likely to
On Tue, 2015-05-26 at 15:13 +, David Laight wrote:
> Yes, interesting, a benchmark that manages to run a lot of code 'cold cache'.
We have binaries here at Google with 400 or 500 MBytes of text.
Not benchmark, super real workloads you know.
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From: Eric Dumazet
> Sent: 26 May 2015 15:35
> On Tue, 2015-05-26 at 13:40 +, David Laight wrote:
>
> > If the JIT compiler is only changing the encoding of the constants
> > in the x86 instructions (rather than changing the instructions themselves)
> > then there is likely to me an unmeasurab
On Tue, 2015-05-26 at 13:40 +, David Laight wrote:
> If the JIT compiler is only changing the encoding of the constants
> in the x86 instructions (rather than changing the instructions themselves)
> then there is likely to me an unmeasurable change in the execution time.
> For instance I don't
From: Alexei Starovoitov
> Sent: 22 May 2015 23:43
> x86 has variable length encoding. x86 JIT compiler is trying
> to pick the shortest encoding for given bpf instruction.
> While doing so the jump targets are changing, so JIT is doing
> multiple passes over the program. Typical program needs 3 pa
From: Alexei Starovoitov
Date: Fri, 22 May 2015 15:42:55 -0700
> x86 has variable length encoding. x86 JIT compiler is trying
> to pick the shortest encoding for given bpf instruction.
> While doing so the jump targets are changing, so JIT is doing
> multiple passes over the program. Typical prog
On 05/23/2015 12:42 AM, Alexei Starovoitov wrote:
x86 has variable length encoding. x86 JIT compiler is trying
to pick the shortest encoding for given bpf instruction.
While doing so the jump targets are changing, so JIT is doing
multiple passes over the program. Typical program needs 3 passes.
S
x86 has variable length encoding. x86 JIT compiler is trying
to pick the shortest encoding for given bpf instruction.
While doing so the jump targets are changing, so JIT is doing
multiple passes over the program. Typical program needs 3 passes.
Some very short programs converge with 2 passes. Larg
