== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:11:05 (1738955465)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.69665 s, 38.9 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-ffff88012a535000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.87226
Iter 1/10: OSS cache speed: 3.15197
Iter 1/10: ladvise speed: 3.20479
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.93832
Iter 2/10: OSS cache speed: 3.24488
Iter 2/10: ladvise speed: 3.19399
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.73733
Iter 3/10: OSS cache speed: 3.20897
Iter 3/10: ladvise speed: 3.14727
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.93788
Iter 4/10: OSS cache speed: 3.19399
Iter 4/10: ladvise speed: 3.21449
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.94988
Iter 5/10: OSS cache speed: 3.18341
Iter 5/10: ladvise speed: 3.07325
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 3.00698
Iter 6/10: OSS cache speed: 3.22551
Iter 6/10: ladvise speed: 3.27429
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.87199
Iter 7/10: OSS cache speed: 3.26299
Iter 7/10: ladvise speed: 2.92215
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 3.06196
Iter 8/10: OSS cache speed: 3.31065
Iter 8/10: ladvise speed: 3.23213
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 3.05217
Iter 9/10: OSS cache speed: 2.95367
Iter 9/10: ladvise speed: 3.00036
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.72087
Iter 10/10: OSS cache speed: 3.2319
Iter 10/10: ladvise speed: 3.18524
Average uncached read: 2.91
Average speedup with OSS cached read:  3.19 = +9%
Average speedup with ladvise willread:  3.14 = +7%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0