== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:51:12 (1777582272)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.0211 s, 9.5 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-ffff8e9d05f2f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.371284
Iter 1/10: OSS cache speed: 0.354324
Iter 1/10: ladvise speed: 0.358899
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.333561
Iter 2/10: OSS cache speed: 0.363381
Iter 2/10: ladvise speed: 0.354297
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.363248
Iter 3/10: OSS cache speed: 0.34936
Iter 3/10: ladvise speed: 0.358862
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.322654
Iter 4/10: OSS cache speed: 0.334575
Iter 4/10: ladvise speed: 0.345129
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.310956
Iter 5/10: OSS cache speed: 0.36167
Iter 5/10: ladvise speed: 0.355417
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.357599
Iter 6/10: OSS cache speed: 0.35673
Iter 6/10: ladvise speed: 0.338421
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.330129
Iter 7/10: OSS cache speed: 0.33737
Iter 7/10: ladvise speed: 0.338435
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.370116
Iter 8/10: OSS cache speed: 0.363799
Iter 8/10: ladvise speed: 0.335164
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.287352
Iter 9/10: OSS cache speed: 0.36855
Iter 9/10: ladvise speed: 0.284947
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.370784
Iter 10/10: OSS cache speed: 0.362985
Iter 10/10: ladvise speed: 0.322364
Average uncached read: .34
Average speedup with OSS cached read:  .35 = +2%
Average speedup with ladvise willread:  .33 = +-2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0