== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:24:53 (1783563893)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.94172 s, 10.5 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-ffff9af1c7e41000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.512833
Iter 1/10: OSS cache speed: 0.5769
Iter 1/10: ladvise speed: 0.516625
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.50707
Iter 2/10: OSS cache speed: 0.551308
Iter 2/10: ladvise speed: 0.55702
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.540045
Iter 3/10: OSS cache speed: 0.488226
Iter 3/10: ladvise speed: 0.558906
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.567106
Iter 4/10: OSS cache speed: 0.527492
Iter 4/10: ladvise speed: 0.620952
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.647087
Iter 5/10: OSS cache speed: 0.757306
Iter 5/10: ladvise speed: 0.682327
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.655947
Iter 6/10: OSS cache speed: 0.653179
Iter 6/10: ladvise speed: 0.718276
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.675377
Iter 7/10: OSS cache speed: 0.935232
Iter 7/10: ladvise speed: 1.09735
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.05255
Iter 8/10: OSS cache speed: 1.13059
Iter 8/10: ladvise speed: 1.2647
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.18487
Iter 9/10: OSS cache speed: 0.939607
Iter 9/10: ladvise speed: 1.15396
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.17392
Iter 10/10: OSS cache speed: 1.17472
Iter 10/10: ladvise speed: 1.0731
Average uncached read: .75
Average speedup with OSS cached read:  .77 = +2%
Average speedup with ladvise willread:  .82 = +9%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0