== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:41:18 (1781214078)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.63 s, 7.7 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-ffff9dd604e64800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.278296
Iter 1/10: OSS cache speed: 0.262383
Iter 1/10: ladvise speed: 0.206588
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.257684
Iter 2/10: OSS cache speed: 0.251173
Iter 2/10: ladvise speed: 0.285198
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.285227
Iter 3/10: OSS cache speed: 0.303672
Iter 3/10: ladvise speed: 0.328316
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.332032
Iter 4/10: OSS cache speed: 0.345274
Iter 4/10: ladvise speed: 0.309307
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.304571
Iter 5/10: OSS cache speed: 0.331364
Iter 5/10: ladvise speed: 0.320082
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.309931
Iter 6/10: OSS cache speed: 0.314546
Iter 6/10: ladvise speed: 0.305558
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.293069
Iter 7/10: OSS cache speed: 0.331748
Iter 7/10: ladvise speed: 0.317689
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.324457
Iter 8/10: OSS cache speed: 0.310899
Iter 8/10: ladvise speed: 0.324479
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.327872
Iter 9/10: OSS cache speed: 0.289208
Iter 9/10: ladvise speed: 0.324902
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.285191
Iter 10/10: OSS cache speed: 0.313523
Iter 10/10: ladvise speed: 0.323403
Average uncached read: .29
Average speedup with OSS cached read:  .30 = +3%
Average speedup with ladvise willread:  .30 = +3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0