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Better Atom prediction of fastest RAID implementation

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This commit is contained in:
Andrea Mazzoleni 2015-11-21 09:08:53 +01:00
parent ce67d68da3
commit cffa2f0c10
2 changed files with 23 additions and 4 deletions
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12
raid/cpu.h
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@ -306,6 +306,18 @@ static inline int raid_cpu_has_slowextendedreg(void)
* Intel Atom (Model 77)
* par2_sse2:5686 MB/s, par2_sse2e:5250 MB/s
* parz_sse2:3100 MB/s, parz_sse2e:3400 MB/s
* par3_sse3:1921 MB/s, par3_sse3e:1813 MB/s
* par4_sse3:1175 MB/s, par4_sse3e:1113 MB/s
* par5_sse3:876 MB/s, par5_sse3e:675 MB/s
* par6_sse3:705 MB/s, par6_sse3e:529 MB/s
*
* Intel Atom (Model 77) "Avoton C2750"
* par2_sse2:5661 MB/s, par2_sse2e:5382 MB/s
* parz_sse2:3110 MB/s, parz_sse2e:3450 MB/s
* par3_sse3:1769 MB/s, par3_sse3e:1856 MB/s
* par4_sse3:1221 MB/s, par4_sse3e:1141 MB/s
* par5_sse3:910 MB/s, par5_sse3e:675 MB/s
* par6_sse3:720 MB/s, par6_sse3e:534 MB/s
*/
if (raid_cpu_is_atom(family, model))
return 1;

15
raid/module.c
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@ -65,10 +65,17 @@ void raid_init(void)
#ifdef CONFIG_SSSE3
if (raid_cpu_has_ssse3()) {
#ifdef CONFIG_X86_64
raid_gen3_ptr = raid_gen3_ssse3ext;
raid_gen_ptr[3] = raid_gen4_ssse3ext;
raid_gen_ptr[4] = raid_gen5_ssse3ext;
raid_gen_ptr[5] = raid_gen6_ssse3ext;
if (raid_cpu_has_slowextendedreg()) {
raid_gen3_ptr = raid_gen3_ssse3;
raid_gen_ptr[3] = raid_gen4_ssse3;
raid_gen_ptr[4] = raid_gen5_ssse3;
raid_gen_ptr[5] = raid_gen6_ssse3;
} else {
raid_gen3_ptr = raid_gen3_ssse3ext;
raid_gen_ptr[3] = raid_gen4_ssse3ext;
raid_gen_ptr[4] = raid_gen5_ssse3ext;
raid_gen_ptr[5] = raid_gen6_ssse3ext;
}
#else
raid_gen3_ptr = raid_gen3_ssse3;
raid_gen_ptr[3] = raid_gen4_ssse3;