== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:24:35 (1786839875)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.12843 s, 17.1 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-ffffa0e08dbc6800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.13721
Iter 1/10: OSS cache speed: 2.13636
Iter 1/10: ladvise speed: 2.08118
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.06473
Iter 2/10: OSS cache speed: 2.18211
Iter 2/10: ladvise speed: 2.21135
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.21331
Iter 3/10: OSS cache speed: 2.19833
Iter 3/10: ladvise speed: 2.12864
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.14998
Iter 4/10: OSS cache speed: 2.12003
Iter 4/10: ladvise speed: 2.05166
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.10731
Iter 5/10: OSS cache speed: 2.20868
Iter 5/10: ladvise speed: 2.12576
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.14702
Iter 6/10: OSS cache speed: 2.20123
Iter 6/10: ladvise speed: 2.14322
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.1906
Iter 7/10: OSS cache speed: 2.20887
Iter 7/10: ladvise speed: 2.12362
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.17824
Iter 8/10: OSS cache speed: 2.08641
Iter 8/10: ladvise speed: 2.1114
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.0811
Iter 9/10: OSS cache speed: 2.21096
Iter 9/10: ladvise speed: 2.08986
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.00176
Iter 10/10: OSS cache speed: 1.99204
Iter 10/10: ladvise speed: 1.48064
Average uncached read: 2.12
Average speedup with OSS cached read:  2.15 = +1%
Average speedup with ladvise willread:  2.05 = +-3%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0