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From: "De Lara Guarch, Pablo" <pablo.de.lara.guarch@intel.com>
To: Tony Lu <zlu@ezchip.com>, "dev@dpdk.org" <dev@dpdk.org>
Thread-Topic: [dpdk-dev] [PATCH v7 1/7] hash: replace existing hash library
 with cuckoo hash implementation
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Date: Thu, 16 Jul 2015 20:42:06 +0000
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Subject: Re: [dpdk-dev] [PATCH v7 1/7] hash: replace existing hash library
 with cuckoo hash implementation
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Hi Tony,

> -----Original Message-----
> From: Tony Lu [mailto:zlu@ezchip.com]
> Sent: Thursday, July 16, 2015 10:40 AM
> To: De Lara Guarch, Pablo; dev@dpdk.org
> Subject: RE: [dpdk-dev] [PATCH v7 1/7] hash: replace existing hash librar=
y
> with cuckoo hash implementation
>=20
> >diff --git a/lib/librte_hash/rte_cuckoo_hash.c
> b/lib/librte_hash/rte_cuckoo_hash.c
> >new file mode 100644
> >index 0000000..50e3acd
> >--- /dev/null
> >+++ b/lib/librte_hash/rte_cuckoo_hash.c
> >@@ -0,0 +1,1027 @@
> ...
> >+
> >+/* Functions to compare multiple of 16 byte keys (up to 128 bytes) */
> >+static int
> >+rte_hash_k16_cmp_eq(const void *key1, const void *key2, size_t key_len
> >__rte_unused)
> >+{
> >+	const __m128i k1 =3D _mm_loadu_si128((const __m128i *) key1);
> >+	const __m128i k2 =3D _mm_loadu_si128((const __m128i *) key2);
> >+	const __m128i x =3D _mm_xor_si128(k1, k2);
> >+
> >+	return !_mm_test_all_zeros(x, x);
> >+}
> ...
>=20
> When compiling the latest dev DPDK for non-x86 arch, it fails on the abov=
e
> code,
> as the SSE is x86 specific defined in <emmintrin.h>.  Is it possible to
> replace this
> function with platform independent code?

Thanks for spotting this. I just sent a patch that should fix the problem.
Can you check if it works?

Thanks,
Pablo
>=20
> Thanks
> -Zhigang Lu