== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:52:47 (1768128767)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.65015 s, 15.8 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-ffff8c4184a87800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.18527
Iter 1/10: OSS cache speed: 2.39546
Iter 1/10: ladvise speed: 2.25283
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.10076
Iter 2/10: OSS cache speed: 2.28929
Iter 2/10: ladvise speed: 2.17745
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.07389
Iter 3/10: OSS cache speed: 2.2247
Iter 3/10: ladvise speed: 1.90366
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.04834
Iter 4/10: OSS cache speed: 2.42341
Iter 4/10: ladvise speed: 2.64812
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.04749
Iter 5/10: OSS cache speed: 1.95632
Iter 5/10: ladvise speed: 1.91187
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.87737
Iter 6/10: OSS cache speed: 2.26331
Iter 6/10: ladvise speed: 2.45236
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.30364
Iter 7/10: OSS cache speed: 2.11641
Iter 7/10: ladvise speed: 1.86157
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.01789
Iter 8/10: OSS cache speed: 2.43139
Iter 8/10: ladvise speed: 2.64866
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.37779
Iter 9/10: OSS cache speed: 2.4394
Iter 9/10: ladvise speed: 2.55536
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.38347
Iter 10/10: OSS cache speed: 2.57044
Iter 10/10: ladvise speed: 2.4522
Average uncached read: 2.14
Average speedup with OSS cached read:  2.31 = +7%
Average speedup with ladvise willread:  2.28 = +6%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0