== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:26:58 (1763083618)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.13308 s, 14.7 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-ffff9be150ecc800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.522419
Iter 1/10: OSS cache speed: 0.623014
Iter 1/10: ladvise speed: 0.76384
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.631673
Iter 2/10: OSS cache speed: 0.753198
Iter 2/10: ladvise speed: 0.764245
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.791368
Iter 3/10: OSS cache speed: 0.817499
Iter 3/10: ladvise speed: 0.906156
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.888692
Iter 4/10: OSS cache speed: 0.953238
Iter 4/10: ladvise speed: 1.00913
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.882279
Iter 5/10: OSS cache speed: 1.25426
Iter 5/10: ladvise speed: 1.57051
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.25254
Iter 6/10: OSS cache speed: 1.40958
Iter 6/10: ladvise speed: 1.33527
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.57383
Iter 7/10: OSS cache speed: 1.99981
Iter 7/10: ladvise speed: 1.94344
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.02312
Iter 8/10: OSS cache speed: 2.2994
Iter 8/10: ladvise speed: 2.30244
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.84137
Iter 9/10: OSS cache speed: 2.20284
Iter 9/10: ladvise speed: 2.26113
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.98339
Iter 10/10: OSS cache speed: 2.38931
Iter 10/10: ladvise speed: 2.15394
Average uncached read: 1.23
Average speedup with OSS cached read:  1.47 = +19%
Average speedup with ladvise willread:  1.50 = +21%
Speedup with OSS cached read less than 20%,  got 19%. Skipping ladvise willread check.
fail_loc=0