== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:59:20 (1772679560)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.41745 s, 16.3 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-ffff9d7fc3ec4800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.86124
Iter 1/10: OSS cache speed: 1.91609
Iter 1/10: ladvise speed: 1.91913
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.8993
Iter 2/10: OSS cache speed: 1.95265
Iter 2/10: ladvise speed: 1.95997
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.92269
Iter 3/10: OSS cache speed: 1.9116
Iter 3/10: ladvise speed: 1.70223
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.70898
Iter 4/10: OSS cache speed: 2.02737
Iter 4/10: ladvise speed: 1.9711
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.92243
Iter 5/10: OSS cache speed: 2.01531
Iter 5/10: ladvise speed: 1.97349
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.97305
Iter 6/10: OSS cache speed: 1.93726
Iter 6/10: ladvise speed: 1.99816
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.89714
Iter 7/10: OSS cache speed: 1.98525
Iter 7/10: ladvise speed: 1.87523
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.88097
Iter 8/10: OSS cache speed: 1.91632
Iter 8/10: ladvise speed: 1.96973
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.93734
Iter 9/10: OSS cache speed: 1.77575
Iter 9/10: ladvise speed: 1.70549
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.92238
Iter 10/10: OSS cache speed: 1.91565
Iter 10/10: ladvise speed: 1.7011
Average uncached read: 1.89
Average speedup with OSS cached read:  1.93 = +2%
Average speedup with ladvise willread:  1.87 = +-1%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0