== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:19:44 (1772907584)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.69332 s, 13.6 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-ffff97dcd90f9800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.00491
Iter 1/10: OSS cache speed: 1.00505
Iter 1/10: ladvise speed: 1.14229
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.09641
Iter 2/10: OSS cache speed: 1.31246
Iter 2/10: ladvise speed: 1.59589
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.39097
Iter 3/10: OSS cache speed: 1.40976
Iter 3/10: ladvise speed: 1.18361
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.20744
Iter 4/10: OSS cache speed: 1.36526
Iter 4/10: ladvise speed: 1.51409
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.80399
Iter 5/10: OSS cache speed: 2.03925
Iter 5/10: ladvise speed: 1.92479
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.95372
Iter 6/10: OSS cache speed: 2.02874
Iter 6/10: ladvise speed: 1.95958
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.98044
Iter 7/10: OSS cache speed: 2.01768
Iter 7/10: ladvise speed: 2.01409
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.93085
Iter 8/10: OSS cache speed: 1.96671
Iter 8/10: ladvise speed: 2.06125
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.13502
Iter 9/10: OSS cache speed: 2.08665
Iter 9/10: ladvise speed: 2.02186
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.12659
Iter 10/10: OSS cache speed: 2.05571
Iter 10/10: ladvise speed: 1.96857
Average uncached read: 1.66
Average speedup with OSS cached read:  1.72 = +3%
Average speedup with ladvise willread:  1.73 = +4%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0