== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:09:13 (1787868553)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.9836 s, 7.5 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-ffff9dc520710000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.310158
Iter 1/10: OSS cache speed: 0.335107
Iter 1/10: ladvise speed: 0.326581
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.311499
Iter 2/10: OSS cache speed: 0.31759
Iter 2/10: ladvise speed: 0.331231
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.365166
Iter 3/10: OSS cache speed: 0.346559
Iter 3/10: ladvise speed: 0.348857
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.340387
Iter 4/10: OSS cache speed: 0.326263
Iter 4/10: ladvise speed: 0.301797
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.355732
Iter 5/10: OSS cache speed: 0.340869
Iter 5/10: ladvise speed: 0.299588
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.27114
Iter 6/10: OSS cache speed: 0.344104
Iter 6/10: ladvise speed: 0.32302
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.28298
Iter 7/10: OSS cache speed: 0.331166
Iter 7/10: ladvise speed: 0.329956
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.298831
Iter 8/10: OSS cache speed: 0.29121
Iter 8/10: ladvise speed: 0.316909
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.330995
Iter 9/10: OSS cache speed: 0.320522
Iter 9/10: ladvise speed: 0.34823
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.320379
Iter 10/10: OSS cache speed: 0.329217
Iter 10/10: ladvise speed: 0.364579
Average uncached read: .31
Average speedup with OSS cached read:  .32 = +3%
Average speedup with ladvise willread:  .32 = +3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0