== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:46:57 (1787795217)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.5485 s, 7.2 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-ffff8da220e63000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.428484
Iter 1/10: OSS cache speed: 0.422186
Iter 1/10: ladvise speed: 0.423371
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.41515
Iter 2/10: OSS cache speed: 0.538015
Iter 2/10: ladvise speed: 0.510472
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.391827
Iter 3/10: OSS cache speed: 0.443154
Iter 3/10: ladvise speed: 0.538122
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.554629
Iter 4/10: OSS cache speed: 0.461357
Iter 4/10: ladvise speed: 0.533295
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.427953
Iter 5/10: OSS cache speed: 0.490398
Iter 5/10: ladvise speed: 0.441146
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.475273
Iter 6/10: OSS cache speed: 0.404355
Iter 6/10: ladvise speed: 0.506942
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.494636
Iter 7/10: OSS cache speed: 0.526114
Iter 7/10: ladvise speed: 0.385242
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.399201
Iter 8/10: OSS cache speed: 0.457553
Iter 8/10: ladvise speed: 0.463647
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.369069
Iter 9/10: OSS cache speed: 0.47644
Iter 9/10: ladvise speed: 0.524264
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.476526
Iter 10/10: OSS cache speed: 0.440888
Iter 10/10: ladvise speed: 0.461943
Average uncached read: .44
Average speedup with OSS cached read:  .46 = +4%
Average speedup with ladvise willread:  .47 = +6%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0