== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:43:16 (1781624596)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.64354 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-ffff925c055f8000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.30764
Iter 1/10: OSS cache speed: 1.35667
Iter 1/10: ladvise speed: 1.50719
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.725412
Iter 2/10: OSS cache speed: 0.776196
Iter 2/10: ladvise speed: 0.955901
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.10087
Iter 3/10: OSS cache speed: 1.40748
Iter 3/10: ladvise speed: 1.78933
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.86425
Iter 4/10: OSS cache speed: 1.93707
Iter 4/10: ladvise speed: 1.70414
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.02322
Iter 5/10: OSS cache speed: 1.46873
Iter 5/10: ladvise speed: 1.8809
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.92818
Iter 6/10: OSS cache speed: 2.13878
Iter 6/10: ladvise speed: 2.05739
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.90018
Iter 7/10: OSS cache speed: 2.30752
Iter 7/10: ladvise speed: 2.27883
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.21669
Iter 8/10: OSS cache speed: 2.41638
Iter 8/10: ladvise speed: 2.43729
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.23008
Iter 9/10: OSS cache speed: 2.39389
Iter 9/10: ladvise speed: 2.50231
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.30095
Iter 10/10: OSS cache speed: 2.5562
Iter 10/10: ladvise speed: 2.37487
Average uncached read: 1.65
Average speedup with OSS cached read:  1.87 = +13%
Average speedup with ladvise willread:  1.94 = +17%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0