== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:04:06 (1744884246)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.56498 s, 29.4 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-ffff88012a4c2000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.5867
Iter 1/10: OSS cache speed: 1.53377
Iter 1/10: ladvise speed: 1.93574
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.85513
Iter 2/10: OSS cache speed: 2.31296
Iter 2/10: ladvise speed: 2.75465
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.20216
Iter 3/10: OSS cache speed: 2.23662
Iter 3/10: ladvise speed: 2.76999
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.50529
Iter 4/10: OSS cache speed: 2.8707
Iter 4/10: ladvise speed: 3.11003
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.91355
Iter 5/10: OSS cache speed: 2.97104
Iter 5/10: ladvise speed: 3.09666
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.94806
Iter 6/10: OSS cache speed: 3.48383
Iter 6/10: ladvise speed: 3.08111
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.82197
Iter 7/10: OSS cache speed: 1.86337
Iter 7/10: ladvise speed: 2.64531
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.32851
Iter 8/10: OSS cache speed: 3.07368
Iter 8/10: ladvise speed: 3.39835
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.00147
Iter 9/10: OSS cache speed: 2.11579
Iter 9/10: ladvise speed: 2.21301
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.38326
Iter 10/10: OSS cache speed: 2.25378
Iter 10/10: ladvise speed: 2.07921
Average uncached read: 2.35
Average speedup with OSS cached read:  2.47 = +5%
Average speedup with ladvise willread:  2.70 = +14%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0