== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:05:49 (1788563149)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.5107 s, 9.1 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-ffffa0d1c8d63800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.307535
Iter 1/10: OSS cache speed: 0.241269
Iter 1/10: ladvise speed: 0.315872
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.312026
Iter 2/10: OSS cache speed: 0.32472
Iter 2/10: ladvise speed: 0.285669
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.253338
Iter 3/10: OSS cache speed: 0.291477
Iter 3/10: ladvise speed: 0.272442
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.245009
Iter 4/10: OSS cache speed: 0.285071
Iter 4/10: ladvise speed: 0.310797
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.288911
Iter 5/10: OSS cache speed: 0.306039
Iter 5/10: ladvise speed: 0.312138
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.351944
Iter 6/10: OSS cache speed: 0.338733
Iter 6/10: ladvise speed: 0.340051
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.258896
Iter 7/10: OSS cache speed: 0.296029
Iter 7/10: ladvise speed: 0.297734
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.350664
Iter 8/10: OSS cache speed: 0.322397
Iter 8/10: ladvise speed: 0.348179
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.35685
Iter 9/10: OSS cache speed: 0.3807
Iter 9/10: ladvise speed: 0.355238
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.342088
Iter 10/10: OSS cache speed: 0.315936
Iter 10/10: ladvise speed: 0.355508
Average uncached read: .30
Average speedup with OSS cached read:  .31 = +3%
Average speedup with ladvise willread:  .31 = +3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0