== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:20:21 (1787397621)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.7284 s, 8.2 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-ffff8e520ae37800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.376965
Iter 1/10: OSS cache speed: 0.40938
Iter 1/10: ladvise speed: 0.390698
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.400286
Iter 2/10: OSS cache speed: 0.425443
Iter 2/10: ladvise speed: 0.463426
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.454812
Iter 3/10: OSS cache speed: 0.461924
Iter 3/10: ladvise speed: 0.39596
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.412977
Iter 4/10: OSS cache speed: 0.367276
Iter 4/10: ladvise speed: 0.405001
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.408197
Iter 5/10: OSS cache speed: 0.348493
Iter 5/10: ladvise speed: 0.347886
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.33647
Iter 6/10: OSS cache speed: 0.400849
Iter 6/10: ladvise speed: 0.348188
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.380198
Iter 7/10: OSS cache speed: 0.372627
Iter 7/10: ladvise speed: 0.387704
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.286978
Iter 8/10: OSS cache speed: 0.368415
Iter 8/10: ladvise speed: 0.370747
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.458463
Iter 9/10: OSS cache speed: 0.434456
Iter 9/10: ladvise speed: 0.445542
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.37297
Iter 10/10: OSS cache speed: 0.398258
Iter 10/10: ladvise speed: 0.343054
Average uncached read: .38
Average speedup with OSS cached read:  .39 = +2%
Average speedup with ladvise willread:  .38 = +0%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0