== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:14:57 (1754406897)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.21342 s, 16.9 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-ffff8ef007cb5000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.34467
Iter 1/10: OSS cache speed: 1.967
Iter 1/10: ladvise speed: 1.60761
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.43835
Iter 2/10: OSS cache speed: 1.74135
Iter 2/10: ladvise speed: 1.84887
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.80205
Iter 3/10: OSS cache speed: 2.19402
Iter 3/10: ladvise speed: 1.956
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.87062
Iter 4/10: OSS cache speed: 2.27739
Iter 4/10: ladvise speed: 2.49716
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.24557
Iter 5/10: OSS cache speed: 2.2038
Iter 5/10: ladvise speed: 2.44674
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.38348
Iter 6/10: OSS cache speed: 2.47689
Iter 6/10: ladvise speed: 2.65162
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.23605
Iter 7/10: OSS cache speed: 0.72008
Iter 7/10: ladvise speed: 0.907591
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.895205
Iter 8/10: OSS cache speed: 0.830881
Iter 8/10: ladvise speed: 1.15221
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.940877
Iter 9/10: OSS cache speed: 1.08311
Iter 9/10: ladvise speed: 1.16928
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.975902
Iter 10/10: OSS cache speed: 1.27638
Iter 10/10: ladvise speed: 1.47095
Average uncached read: 1.61
Average speedup with OSS cached read:  1.67 = +3%
Average speedup with ladvise willread:  1.77 = +9%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0