Function report |
Source Code:lib\raid6\algos.c |
Create Date:2022-07-28 07:09:10 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Name:raid6_choose_gen
Proto:static inline const struct raid6_calls *raid6_choose_gen(void *( *const dptrs)[(65536/((1UL)<<12))+2], const int disks)
Type:struct raid6_calls
Parameter:
Type | Parameter | Name |
---|---|---|
void *( *const | dptrs | |
const int | disks |
157 | If Not best || Has special performance attribute >= Has special performance attribute Then |
166 | perf = 0 |
171 | cpu_relax() |
172 | When time_before(jiffies, j1 + (1 << RAID6_TIME_JIFFIES_LG2)) cycle |
174 | gen_syndrome(disks, PAGE_SIZE, * dptrs) |
175 | perf++ |
177 | preempt_enable() |
179 | If perf > bestgenperf Then |
180 | bestgenperf = perf |
183 | pr_info("raid6: %-8s gen() %5ld MB/s\n", Name of this routine set , (perf * HZ) >> (20 - 16 + RAID6_TIME_JIFFIES_LG2)) |
186 | If Not xor_syndrome Then Continue |
189 | perf = 0 |
194 | cpu_relax() |
195 | When time_before(jiffies, j1 + (1 << RAID6_TIME_JIFFIES_LG2)) cycle |
201 | preempt_enable() |
203 | If best == algo Then bestxorperf = perf |
206 | pr_info("raid6: %-8s xor() %5ld MB/s\n", Name of this routine set , (perf * HZ) >> (20 - 16 + RAID6_TIME_JIFFIES_LG2 + 1)) |
211 | If best Then |
212 | pr_info("raid6: using algorithm %s gen() %ld MB/s\n", Name of this routine set , (bestgenperf * HZ) >> (20 - 16 + RAID6_TIME_JIFFIES_LG2)) |
215 | If xor_syndrome Then pr_info("raid6: .... xor() %ld MB/s, rmw enabled\n", (bestxorperf * HZ) >> (20 - 16 + RAID6_TIME_JIFFIES_LG2 + 1)) |
218 | raid6_call = best |
219 | Else pr_err("raid6: Yikes! No algorithm found!\n") |
222 | Return best |
Name | Describe |
---|---|
raid6_select_algo | This code uses the gfmul table as convenient data set to abuse |
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