== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:18:32 (1740485912)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.92119 s, 35.9 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-ffff88013738e000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.92748
Iter 1/10: OSS cache speed: 3.31983
Iter 1/10: ladvise speed: 3.32171
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.90161
Iter 2/10: OSS cache speed: 3.3727
Iter 2/10: ladvise speed: 3.32524
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.9985
Iter 3/10: OSS cache speed: 3.33934
Iter 3/10: ladvise speed: 3.25979
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.9269
Iter 4/10: OSS cache speed: 3.18092
Iter 4/10: ladvise speed: 3.2323
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 3.00093
Iter 5/10: OSS cache speed: 3.24051
Iter 5/10: ladvise speed: 3.30098
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.97019
Iter 6/10: OSS cache speed: 3.33252
Iter 6/10: ladvise speed: 3.37681
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.77341
Iter 7/10: OSS cache speed: 3.36804
Iter 7/10: ladvise speed: 3.36259
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.95265
Iter 8/10: OSS cache speed: 3.30309
Iter 8/10: ladvise speed: 3.28848
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 3.01183
Iter 9/10: OSS cache speed: 3.32311
Iter 9/10: ladvise speed: 3.30887
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.96473
Iter 10/10: OSS cache speed: 3.31439
Iter 10/10: ladvise speed: 3.2978
Average uncached read: 2.94
Average speedup with OSS cached read:  3.30 = +12%
Average speedup with ladvise willread:  3.30 = +12%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0