== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:52:35 (1788562355)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.3303 s, 7.9 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-ffff9eed04ec5000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.334496
Iter 1/10: OSS cache speed: 0.279697
Iter 1/10: ladvise speed: 0.319498
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.358378
Iter 2/10: OSS cache speed: 0.303737
Iter 2/10: ladvise speed: 0.385276
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.321546
Iter 3/10: OSS cache speed: 0.337025
Iter 3/10: ladvise speed: 0.368946
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.334956
Iter 4/10: OSS cache speed: 0.255304
Iter 4/10: ladvise speed: 0.327672
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.305878
Iter 5/10: OSS cache speed: 0.336953
Iter 5/10: ladvise speed: 0.31338
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.355139
Iter 6/10: OSS cache speed: 0.341857
Iter 6/10: ladvise speed: 0.26962
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.326159
Iter 7/10: OSS cache speed: 0.29679
Iter 7/10: ladvise speed: 0.31804
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.339957
Iter 8/10: OSS cache speed: 0.391869
Iter 8/10: ladvise speed: 0.382684
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.391185
Iter 9/10: OSS cache speed: 0.400408
Iter 9/10: ladvise speed: 0.378255
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.335657
Iter 10/10: OSS cache speed: 0.253569
Iter 10/10: ladvise speed: 0.302996
Average uncached read: .34
Average speedup with OSS cached read:  .31 = +-8%
Average speedup with ladvise willread:  .33 = +-2%
Speedup with OSS cached read less than 20%,  got -8%. Skipping ladvise willread check.
fail_loc=0