== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:35:11 (1788910511)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.32676 s, 16.6 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-ffff95f8852c8800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.910659
Iter 1/10: OSS cache speed: 0.983888
Iter 1/10: ladvise speed: 0.864196
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.536201
Iter 2/10: OSS cache speed: 0.732101
Iter 2/10: ladvise speed: 0.739884
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.697051
Iter 3/10: OSS cache speed: 0.919713
Iter 3/10: ladvise speed: 0.976499
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.924812
Iter 4/10: OSS cache speed: 1.26835
Iter 4/10: ladvise speed: 1.31683
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.18805
Iter 5/10: OSS cache speed: 1.38542
Iter 5/10: ladvise speed: 1.44334
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.22916
Iter 6/10: OSS cache speed: 1.58153
Iter 6/10: ladvise speed: 1.29972
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.0407
Iter 7/10: OSS cache speed: 1.44836
Iter 7/10: ladvise speed: 1.79072
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.77551
Iter 8/10: OSS cache speed: 2.34854
Iter 8/10: ladvise speed: 2.51918
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.28357
Iter 9/10: OSS cache speed: 2.69461
Iter 9/10: ladvise speed: 2.53407
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.32474
Iter 10/10: OSS cache speed: 2.59914
Iter 10/10: ladvise speed: 2.6163
Average uncached read: 1.29
Average speedup with OSS cached read:  1.59 = +23%
Average speedup with ladvise willread:  1.61 = +24%
fail_loc=0