== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:26:39 (1734431199)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.09102 s, 25.6 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-ffff8800b63a8000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.904593
Iter 1/10: OSS cache speed: 0.819861
Iter 1/10: ladvise speed: 0.76864
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.801062
Iter 2/10: OSS cache speed: 0.852468
Iter 2/10: ladvise speed: 0.920637
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.02836
Iter 3/10: OSS cache speed: 1.05685
Iter 3/10: ladvise speed: 1.21193
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.22659
Iter 4/10: OSS cache speed: 1.30139
Iter 4/10: ladvise speed: 1.42529
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.65073
Iter 5/10: OSS cache speed: 1.72849
Iter 5/10: ladvise speed: 1.67313
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.02518
Iter 6/10: OSS cache speed: 2.35667
Iter 6/10: ladvise speed: 2.46473
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.14935
Iter 7/10: OSS cache speed: 2.4171
Iter 7/10: ladvise speed: 2.06486
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.77369
Iter 8/10: OSS cache speed: 2.04787
Iter 8/10: ladvise speed: 2.49441
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.3955
Iter 9/10: OSS cache speed: 2.39896
Iter 9/10: ladvise speed: 2.26818
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.53941
Iter 10/10: OSS cache speed: 2.51344
Iter 10/10: ladvise speed: 2.43159
Average uncached read: 1.64
Average speedup with OSS cached read:  1.74 = +6%
Average speedup with ladvise willread:  1.77 = +7%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0