== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:01:18 (1772758878)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.622 s, 15.8 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-ffff940859098000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.09968
Iter 1/10: OSS cache speed: 2.28335
Iter 1/10: ladvise speed: 2.24065
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.03782
Iter 2/10: OSS cache speed: 2.25875
Iter 2/10: ladvise speed: 2.21104
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.9978
Iter 3/10: OSS cache speed: 2.22838
Iter 3/10: ladvise speed: 2.22649
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.00866
Iter 4/10: OSS cache speed: 2.26734
Iter 4/10: ladvise speed: 2.19451
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.12513
Iter 5/10: OSS cache speed: 2.28798
Iter 5/10: ladvise speed: 2.22316
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.08493
Iter 6/10: OSS cache speed: 2.25043
Iter 6/10: ladvise speed: 2.19144
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.99971
Iter 7/10: OSS cache speed: 2.0825
Iter 7/10: ladvise speed: 0.842058
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.62743
Iter 8/10: OSS cache speed: 0.551371
Iter 8/10: ladvise speed: 0.580784
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.556533
Iter 9/10: OSS cache speed: 0.541763
Iter 9/10: ladvise speed: 0.559823
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.506135
Iter 10/10: OSS cache speed: 0.628842
Iter 10/10: ladvise speed: 0.77024
Average uncached read: 1.60
Average speedup with OSS cached read:  1.73 = +8%
Average speedup with ladvise willread:  1.60 = +0%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0