== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:00:22 (1787605222)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.5032 s, 6.8 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-ffff99f5142c1000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.369723
Iter 1/10: OSS cache speed: 0.388615
Iter 1/10: ladvise speed: 0.454453
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.334669
Iter 2/10: OSS cache speed: 0.384262
Iter 2/10: ladvise speed: 0.365855
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.362236
Iter 3/10: OSS cache speed: 0.26107
Iter 3/10: ladvise speed: 0.433236
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.387532
Iter 4/10: OSS cache speed: 0.498934
Iter 4/10: ladvise speed: 0.396609
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.40894
Iter 5/10: OSS cache speed: 0.493759
Iter 5/10: ladvise speed: 0.432024
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.44218
Iter 6/10: OSS cache speed: 0.370997
Iter 6/10: ladvise speed: 0.388086
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.510105
Iter 7/10: OSS cache speed: 0.510452
Iter 7/10: ladvise speed: 0.484286
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.430818
Iter 8/10: OSS cache speed: 0.459956
Iter 8/10: ladvise speed: 0.485093
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.395467
Iter 9/10: OSS cache speed: 0.51693
Iter 9/10: ladvise speed: 0.418018
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.426377
Iter 10/10: OSS cache speed: 0.491715
Iter 10/10: ladvise speed: 0.474002
Average uncached read: .40
Average speedup with OSS cached read:  .43 = +7%
Average speedup with ladvise willread:  .43 = +7%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0