== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:23:34 (1789547014)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.50601 s, 16.1 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-ffff9f53983bc000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.38592
Iter 1/10: OSS cache speed: 1.85705
Iter 1/10: ladvise speed: 1.92227
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.00397
Iter 2/10: OSS cache speed: 2.21593
Iter 2/10: ladvise speed: 2.0152
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.04272
Iter 3/10: OSS cache speed: 2.51687
Iter 3/10: ladvise speed: 2.58002
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.32333
Iter 4/10: OSS cache speed: 2.4528
Iter 4/10: ladvise speed: 1.07204
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.06648
Iter 5/10: OSS cache speed: 1.83573
Iter 5/10: ladvise speed: 1.70069
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.90832
Iter 6/10: OSS cache speed: 2.37998
Iter 6/10: ladvise speed: 1.8989
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.406109
Iter 7/10: OSS cache speed: 0.485965
Iter 7/10: ladvise speed: 0.531204
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.46056
Iter 8/10: OSS cache speed: 0.492567
Iter 8/10: ladvise speed: 0.447492
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.701476
Iter 9/10: OSS cache speed: 0.894674
Iter 9/10: ladvise speed: 0.433358
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.671023
Iter 10/10: OSS cache speed: 0.920573
Iter 10/10: ladvise speed: 0.809089
Average uncached read: 1.29
Average speedup with OSS cached read:  1.60 = +24%
Average speedup with ladvise willread:  1.34 = +3%
fail_loc=0