== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 06:51:29 (1769082689)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.97425 s, 17.6 MB/s
llite.lustre-ffff97f1714a6800.read_ahead_stats=clear
llite.lustre-ffff97f1714a6800.read_ahead_stats=
snapshot_time             1769082703.325717587 secs.nsecs
start_time                1769082696.640086384 secs.nsecs
elapsed_time              6.685631203 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          4 samples [pages]
failed_to_reach_end       1 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=224683: Thu Jan 22 06:58:05 2026
  read: IOPS=13, BW=13.5MiB/s (14.2MB/s)(5120MiB/379196msec)
    clat (msec): min=23, max=404, avg=73.89, stdev=45.65
     lat (msec): min=23, max=404, avg=73.89, stdev=45.65
    clat percentiles (msec):
     |  1.00th=[   39],  5.00th=[   44], 10.00th=[   45], 20.00th=[   47],
     | 30.00th=[   48], 40.00th=[   50], 50.00th=[   52], 60.00th=[   56],
     | 70.00th=[   72], 80.00th=[  105], 90.00th=[  123], 95.00th=[  171],
     | 99.00th=[  253], 99.50th=[  275], 99.90th=[  342], 99.95th=[  368],
     | 99.99th=[  405]
   bw (  KiB/s): min= 1965, max=24576, per=100.00%, avg=13883.31, stdev=6656.86, samples=754
   iops        : min=    1, max=   24, avg=13.40, stdev= 6.65, samples=754
  lat (msec)   : 50=41.56%, 100=35.00%, 250=22.30%, 500=1.13%
  cpu          : usr=0.62%, sys=73.34%, ctx=14113, majf=5291, minf=1305698
  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=13.5MiB/s (14.2MB/s), 13.5MiB/s-13.5MiB/s (14.2MB/s-14.2MB/s), io=5120MiB (5369MB), run=379196-379196msec