From: davem@davemloft.net (David Miller)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH net-next V2] ARM: net: support BPF_ALU | BPF_MOD instructions in the BPF JIT.
Date: Mon, 05 Oct 2015 07:03:14 -0700 (PDT) [thread overview]
Message-ID: <20151005.070314.997252169637059167.davem@davemloft.net> (raw)
In-Reply-To: <1443798407-19154-1-git-send-email-nschichan@freebox.fr>
From: Nicolas Schichan <nschichan@freebox.fr>
Date: Fri, 2 Oct 2015 17:06:47 +0200
> For ARMv7 with UDIV instruction support, generate an UDIV instruction
> followed by an MLS instruction.
>
> For other ARM variants, generate code calling a C wrapper similar to
> the jit_udiv() function used for BPF_ALU | BPF_DIV instructions.
>
> Some performance numbers reported by the test_bpf module (the duration
> per filter run is reported in nanoseconds, between "jitted:<x>" and
> "PASS":
>
> ARMv7 QEMU nojit: test_bpf: #3 DIV_MOD_KX jited:0 2196 PASS
> ARMv7 QEMU jit: test_bpf: #3 DIV_MOD_KX jited:1 104 PASS
> ARMv5 QEMU nojit: test_bpf: #3 DIV_MOD_KX jited:0 2176 PASS
> ARMv5 QEMU jit: test_bpf: #3 DIV_MOD_KX jited:1 1104 PASS
> ARMv5 kirkwood nojit: test_bpf: #3 DIV_MOD_KX jited:0 1103 PASS
> ARMv5 kirkwood jit: test_bpf: #3 DIV_MOD_KX jited:1 311 PASS
>
> Signed-off-by: Nicolas Schichan <nschichan@freebox.fr>
Applied, thanks.
prev parent reply other threads:[~2015-10-05 14:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-02 15:06 [PATCH net-next V2] ARM: net: support BPF_ALU | BPF_MOD instructions in the BPF JIT Nicolas Schichan
2015-10-02 15:25 ` Alexei Starovoitov
2015-10-05 14:03 ` David Miller [this message]
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