== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:13:17 (1775848397)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 18.2489 s, 5.7 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-ffff9c55cc4a7800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.34966
Iter 1/10: OSS cache speed: 0.328343
Iter 1/10: ladvise speed: 0.373468
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.371619
Iter 2/10: OSS cache speed: 0.385861
Iter 2/10: ladvise speed: 0.316987
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.309894
Iter 3/10: OSS cache speed: 0.33937
Iter 3/10: ladvise speed: 0.356786
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.317785
Iter 4/10: OSS cache speed: 0.312571
Iter 4/10: ladvise speed: 0.279147
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.286344
Iter 5/10: OSS cache speed: 0.317762
Iter 5/10: ladvise speed: 0.355933
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.291496
Iter 6/10: OSS cache speed: 0.300722
Iter 6/10: ladvise speed: 0.329882
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.281886
Iter 7/10: OSS cache speed: 0.292416
Iter 7/10: ladvise speed: 0.355681
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.322597
Iter 8/10: OSS cache speed: 0.363464
Iter 8/10: ladvise speed: 0.300561
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.332277
Iter 9/10: OSS cache speed: 0.365585
Iter 9/10: ladvise speed: 0.376456
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.290358
Iter 10/10: OSS cache speed: 0.318588
Iter 10/10: ladvise speed: 0.302216
Average uncached read: .31
Average speedup with OSS cached read:  .33 = +6%
Average speedup with ladvise willread:  .33 = +6%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0