== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:38:21 (1734676701)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.6073 s, 22.8 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-ffff8800b3894800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.06672
Iter 1/10: OSS cache speed: 1.11005
Iter 1/10: ladvise speed: 1.02017
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.03425
Iter 2/10: OSS cache speed: 1.05285
Iter 2/10: ladvise speed: 1.00834
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.823672
Iter 3/10: OSS cache speed: 0.981154
Iter 3/10: ladvise speed: 1.07196
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.85357
Iter 4/10: OSS cache speed: 1.02192
Iter 4/10: ladvise speed: 1.40304
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.20879
Iter 5/10: OSS cache speed: 1.21374
Iter 5/10: ladvise speed: 1.04708
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.844297
Iter 6/10: OSS cache speed: 1.15079
Iter 6/10: ladvise speed: 1.11265
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.977682
Iter 7/10: OSS cache speed: 1.20308
Iter 7/10: ladvise speed: 1.23392
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.95813
Iter 8/10: OSS cache speed: 1.12156
Iter 8/10: ladvise speed: 1.2022
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.19203
Iter 9/10: OSS cache speed: 1.09794
Iter 9/10: ladvise speed: 1.23603
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.99811
Iter 10/10: OSS cache speed: 1.16626
Iter 10/10: ladvise speed: 1.17124
Average uncached read: .99
Average speedup with OSS cached read:  1.11 = +12%
Average speedup with ladvise willread:  1.15 = +16%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0