== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:54:33 (1787885673)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.2053 s, 7.4 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-ffff9f88484a6000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.339396
Iter 1/10: OSS cache speed: 0.310756
Iter 1/10: ladvise speed: 0.3574
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.301201
Iter 2/10: OSS cache speed: 0.331626
Iter 2/10: ladvise speed: 0.349248
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.285127
Iter 3/10: OSS cache speed: 0.293928
Iter 3/10: ladvise speed: 0.331638
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.351351
Iter 4/10: OSS cache speed: 0.323731
Iter 4/10: ladvise speed: 0.350769
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.403194
Iter 5/10: OSS cache speed: 0.381666
Iter 5/10: ladvise speed: 0.367424
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.399199
Iter 6/10: OSS cache speed: 0.390222
Iter 6/10: ladvise speed: 0.377589
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.388278
Iter 7/10: OSS cache speed: 0.335812
Iter 7/10: ladvise speed: 0.322163
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.345567
Iter 8/10: OSS cache speed: 0.384412
Iter 8/10: ladvise speed: 0.333894
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.391784
Iter 9/10: OSS cache speed: 0.341571
Iter 9/10: ladvise speed: 0.308668
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.326964
Iter 10/10: OSS cache speed: 0.310945
Iter 10/10: ladvise speed: 0.352061
Average uncached read: .35
Average speedup with OSS cached read:  .34 = +-2%
Average speedup with ladvise willread:  .34 = +-2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0