== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:24:25 (1761963865)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.77484 s, 18.2 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-ffff9b10865f5800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.93267
Iter 1/10: OSS cache speed: 1.74945
Iter 1/10: ladvise speed: 1.47933
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.40027
Iter 2/10: OSS cache speed: 1.40029
Iter 2/10: ladvise speed: 1.31275
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.23636
Iter 3/10: OSS cache speed: 1.4501
Iter 3/10: ladvise speed: 1.3771
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.19485
Iter 4/10: OSS cache speed: 1.21451
Iter 4/10: ladvise speed: 1.18989
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.25394
Iter 5/10: OSS cache speed: 1.23093
Iter 5/10: ladvise speed: 1.19882
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.31966
Iter 6/10: OSS cache speed: 1.32315
Iter 6/10: ladvise speed: 1.16312
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.30356
Iter 7/10: OSS cache speed: 1.18525
Iter 7/10: ladvise speed: 1.07456
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.13042
Iter 8/10: OSS cache speed: 1.12364
Iter 8/10: ladvise speed: 1.34494
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.24145
Iter 9/10: OSS cache speed: 1.68595
Iter 9/10: ladvise speed: 1.38235
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.0842
Iter 10/10: OSS cache speed: 1.1385
Iter 10/10: ladvise speed: 1.02244
Average uncached read: 1.30
Average speedup with OSS cached read:  1.35 = +3%
Average speedup with ladvise willread:  1.25 = +-3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0