== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 15:23:13 (1763410993)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.8879 s, 8.8 MB/s
llite.lustre-ffff9bfd32570800.read_ahead_stats=clear
llite.lustre-ffff9bfd32570800.read_ahead_stats=
snapshot_time             1763411033.251133005 secs.nsecs
start_time                1763411011.272165933 secs.nsecs
elapsed_time              21.978967072 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          108 samples [pages]
failed_to_reach_end       2 samples [pages]
failed_to_fast_read       230 samples [pages]
mmap_range_read           225 samples [pages]
readahead_pages           225 samples [pages] 8 128 25370
/usr/bin/fio
thp                     : Memory Advise Huge Page
read_test: (g=0): rw=read, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=mmap, iodepth=1
fio-3.19
Starting 1 process

read_test: (groupid=0, jobs=1): err= 0: pid=225643: Mon Nov 17 15:35:32 2025
  read: IOPS=7, BW=7589KiB/s (7771kB/s)(5120MiB/690840msec)
    clat (msec): min=24, max=425, avg=134.40, stdev=39.61
     lat (msec): min=24, max=425, avg=134.41, stdev=39.61
    clat percentiles (msec):
     |  1.00th=[   78],  5.00th=[   86], 10.00th=[   92], 20.00th=[  102],
     | 30.00th=[  109], 40.00th=[  118], 50.00th=[  128], 60.00th=[  138],
     | 70.00th=[  148], 80.00th=[  165], 90.00th=[  188], 95.00th=[  207],
     | 99.00th=[  253], 99.50th=[  279], 99.90th=[  363], 99.95th=[  384],
     | 99.99th=[  426]
   bw (  KiB/s): min= 2011, max=14336, per=100.00%, avg=7627.93, stdev=1885.15, samples=1364
   iops        : min=    1, max=   14, avg= 6.78, stdev= 1.91, samples=1364
  lat (msec)   : 50=0.14%, 100=18.96%, 250=79.77%, 500=1.13%
  cpu          : usr=0.43%, sys=34.06%, ctx=25485, majf=7448, minf=1303540
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=5120,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=7589KiB/s (7771kB/s), 7589KiB/s-7589KiB/s (7771kB/s-7771kB/s), io=5120MiB (5369MB), run=690840-690840msec