== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:44:10 (1788561850)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.1224 s, 9.4 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-ffff95fe93a4b000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.41747
Iter 1/10: OSS cache speed: 0.43709
Iter 1/10: ladvise speed: 0.408348
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.384355
Iter 2/10: OSS cache speed: 0.420198
Iter 2/10: ladvise speed: 0.389535
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.442427
Iter 3/10: OSS cache speed: 0.398836
Iter 3/10: ladvise speed: 0.346138
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.358492
Iter 4/10: OSS cache speed: 0.380207
Iter 4/10: ladvise speed: 0.433431
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.380186
Iter 5/10: OSS cache speed: 0.385284
Iter 5/10: ladvise speed: 0.427349
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.387738
Iter 6/10: OSS cache speed: 0.402861
Iter 6/10: ladvise speed: 0.329612
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.370599
Iter 7/10: OSS cache speed: 0.370192
Iter 7/10: ladvise speed: 0.45991
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.389116
Iter 8/10: OSS cache speed: 0.427482
Iter 8/10: ladvise speed: 0.390558
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.401576
Iter 9/10: OSS cache speed: 0.328129
Iter 9/10: ladvise speed: 0.341369
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.419931
Iter 10/10: OSS cache speed: 0.463362
Iter 10/10: ladvise speed: 0.487413
Average uncached read: .39
Average speedup with OSS cached read:  .40 = +2%
Average speedup with ladvise willread:  .40 = +2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0