== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:25:46 (1784406346)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.70613 s, 15.6 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff9098c8964800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.10128
Iter 1/10: OSS cache speed: 1.25967
Iter 1/10: ladvise speed: 1.55865
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.38594
Iter 2/10: OSS cache speed: 1.91114
Iter 2/10: ladvise speed: 2.02789
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.83898
Iter 3/10: OSS cache speed: 1.62129
Iter 3/10: ladvise speed: 1.76163
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.40125
Iter 4/10: OSS cache speed: 2.02221
Iter 4/10: ladvise speed: 2.09232
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.0115
Iter 5/10: OSS cache speed: 2.03144
Iter 5/10: ladvise speed: 1.95422
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.88754
Iter 6/10: OSS cache speed: 2.23804
Iter 6/10: ladvise speed: 2.3076
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.18205
Iter 7/10: OSS cache speed: 2.24939
Iter 7/10: ladvise speed: 2.19422
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.05754
Iter 8/10: OSS cache speed: 2.19615
Iter 8/10: ladvise speed: 1.18323
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.573312
Iter 9/10: OSS cache speed: 0.683067
Iter 9/10: ladvise speed: 0.719095
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.33527
Iter 10/10: OSS cache speed: 1.91664
Iter 10/10: ladvise speed: 2.27477
Average uncached read: 1.57
Average speedup with OSS cached read:  1.81 = +15%
Average speedup with ladvise willread:  1.80 = +14%
Speedup with OSS cached read less than 20%,  got 15%. Skipping ladvise willread check.
fail_loc=0