== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:29:20 (1733398160)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.58319 s, 40.6 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-ffff8800b61af000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.63074
Iter 1/10: OSS cache speed: 2.50243
Iter 1/10: ladvise speed: 2.84031
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.89221
Iter 2/10: OSS cache speed: 2.70117
Iter 2/10: ladvise speed: 2.48922
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 3.02414
Iter 3/10: OSS cache speed: 3.26914
Iter 3/10: ladvise speed: 3.15342
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 3.00659
Iter 4/10: OSS cache speed: 3.33237
Iter 4/10: ladvise speed: 3.06999
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.77359
Iter 5/10: OSS cache speed: 3.24079
Iter 5/10: ladvise speed: 3.19168
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.4099
Iter 6/10: OSS cache speed: 2.41383
Iter 6/10: ladvise speed: 2.35051
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 3.00311
Iter 7/10: OSS cache speed: 3.2489
Iter 7/10: ladvise speed: 3.30604
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 3.13249
Iter 8/10: OSS cache speed: 3.14872
Iter 8/10: ladvise speed: 3.142
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.98974
Iter 9/10: OSS cache speed: 2.97026
Iter 9/10: ladvise speed: 3.22317
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.83434
Iter 10/10: OSS cache speed: 2.51029
Iter 10/10: ladvise speed: 3.16297
Average uncached read: 2.86
Average speedup with OSS cached read:  2.93 = +2%
Average speedup with ladvise willread:  2.99 = +4%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0