== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:52:07 (1771440727)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.97923 s, 17.5 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-ffff9d1d4526b000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.740239
Iter 1/10: OSS cache speed: 1.14389
Iter 1/10: ladvise speed: 1.13565
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.49873
Iter 2/10: OSS cache speed: 1.75467
Iter 2/10: ladvise speed: 1.8463
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.95063
Iter 3/10: OSS cache speed: 1.74953
Iter 3/10: ladvise speed: 1.76921
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.83911
Iter 4/10: OSS cache speed: 2.07597
Iter 4/10: ladvise speed: 2.03503
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.91576
Iter 5/10: OSS cache speed: 1.90331
Iter 5/10: ladvise speed: 1.87635
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.90718
Iter 6/10: OSS cache speed: 1.95535
Iter 6/10: ladvise speed: 2.10045
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.05592
Iter 7/10: OSS cache speed: 1.95952
Iter 7/10: ladvise speed: 1.9984
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.93304
Iter 8/10: OSS cache speed: 1.94733
Iter 8/10: ladvise speed: 1.94892
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.94996
Iter 9/10: OSS cache speed: 1.89501
Iter 9/10: ladvise speed: 1.92314
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.94991
Iter 10/10: OSS cache speed: 1.93047
Iter 10/10: ladvise speed: 1.91231
Average uncached read: 1.77
Average speedup with OSS cached read:  1.83 = +3%
Average speedup with ladvise willread:  1.85 = +4%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0