== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:32:05 (1779701525)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.7523 s, 9.8 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-ffff99fd10d71800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.379757
Iter 1/10: OSS cache speed: 0.331813
Iter 1/10: ladvise speed: 0.384834
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.326967
Iter 2/10: OSS cache speed: 0.395943
Iter 2/10: ladvise speed: 0.358642
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.345492
Iter 3/10: OSS cache speed: 0.372179
Iter 3/10: ladvise speed: 0.298241
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.332587
Iter 4/10: OSS cache speed: 0.34629
Iter 4/10: ladvise speed: 0.358163
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.332237
Iter 5/10: OSS cache speed: 0.331283
Iter 5/10: ladvise speed: 0.315578
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.330673
Iter 6/10: OSS cache speed: 0.362789
Iter 6/10: ladvise speed: 0.358983
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.346277
Iter 7/10: OSS cache speed: 0.389711
Iter 7/10: ladvise speed: 0.352654
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.303134
Iter 8/10: OSS cache speed: 0.347665
Iter 8/10: ladvise speed: 0.361998
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.274871
Iter 9/10: OSS cache speed: 0.308897
Iter 9/10: ladvise speed: 0.318244
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.317476
Iter 10/10: OSS cache speed: 0.307225
Iter 10/10: ladvise speed: 0.350313
Average uncached read: .32
Average speedup with OSS cached read:  .34 = +6%
Average speedup with ladvise willread:  .34 = +6%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0