1. 14 9月, 2006 1 次提交
  2. 09 8月, 2006 1 次提交
  3. 03 7月, 2006 1 次提交
  4. 24 5月, 2006 2 次提交
  5. 22 4月, 2006 1 次提交
  6. 31 3月, 2006 8 次提交
  7. 04 3月, 2006 2 次提交
  8. 06 1月, 2006 4 次提交
  9. 29 10月, 2005 1 次提交
  10. 28 7月, 2005 1 次提交
  11. 08 7月, 2005 2 次提交
  12. 28 6月, 2005 2 次提交
  13. 27 6月, 2005 1 次提交
    • A
      [PATCH] pcnet_cs.c: IRQ handler optimization · 93ad4fb0
      Andreas Mohr 提交于
      During some performance diagnostics I stumbled on this slightly wasteful
      code in pcnet_cs.c which I made the patch included at the bottom for (two
      minor comment fixes included).
      
      Improvement:
      instead of *always* calculating
      lea    0x2c0(%edx),%ebx
      and then additionally doing the
      mov    %edx,0xc0(%ebx)
      addition *if we need it*,
      
      we now do the *whole* calculation of
      mov    %edx,0x380(%ebx)
      *only* if we need it.
      This even manages to save us a whole 16-byte alignment buffer loss
      in this compilation case.
      
      Result: slightly improves IRQ handler performance in both shared and
      non-shared IRQ case, which should make my rusty P3/700 a slight bit happier.
      
      Thank you for your support,
      
      Andreas Mohr
      
      old asm result (using gcc 3.3.5):
      
      000015a0 <ei_irq_wrapper>:
          15a0:       55                      push   %ebp
          15a1:       89 e5                   mov    %esp,%ebp
          15a3:       53                      push   %ebx
          15a4:       8d 9a c0 02 00 00       lea    0x2c0(%edx),%ebx
          15aa:       e8 fc ff ff ff          call   15ab <ei_irq_wrapper+0xb>
          15af:       83 f8 01                cmp    $0x1,%eax
          15b2:       74 03                   je     15b7 <ei_irq_wrapper+0x17>
          15b4:       5b                      pop    %ebx
          15b5:       5d                      pop    %ebp
          15b6:       c3                      ret
          15b7:       31 d2                   xor    %edx,%edx
          15b9:       89 93 c0 00 00 00       mov    %edx,0xc0(%ebx)
          15bf:       eb f3                   jmp    15b4 <ei_irq_wrapper+0x14>
          15c1:       eb 0d                   jmp    15d0 <ei_watchdog>
          15c3:       90                      nop
          15c4:       90                      nop
          15c5:       90                      nop
          15c6:       90                      nop
          15c7:       90                      nop
          15c8:       90                      nop
          15c9:       90                      nop
          15ca:       90                      nop
          15cb:       90                      nop
          15cc:       90                      nop
          15cd:       90                      nop
          15ce:       90                      nop
          15cf:       90                      nop
      
      000015d0 <ei_watchdog>:
      
      new asm result:
      
      000015a0 <ei_irq_wrapper>:
          15a0:       55                      push   %ebp
          15a1:       89 e5                   mov    %esp,%ebp
          15a3:       53                      push   %ebx
          15a4:       89 d3                   mov    %edx,%ebx
          15a6:       e8 fc ff ff ff          call   15a7 <ei_irq_wrapper+0x7>
          15ab:       83 f8 01                cmp    $0x1,%eax
          15ae:       74 03                   je     15b3 <ei_irq_wrapper+0x13>
          15b0:       5b                      pop    %ebx
          15b1:       5d                      pop    %ebp
          15b2:       c3                      ret
          15b3:       31 d2                   xor    %edx,%edx
          15b5:       89 93 80 03 00 00       mov    %edx,0x380(%ebx)
          15bb:       eb f3                   jmp    15b0 <ei_irq_wrapper+0x10>
          15bd:       8d 76 00                lea    0x0(%esi),%esi
      
      000015c0 <ei_watchdog>:
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      93ad4fb0
  14. 16 5月, 2005 1 次提交
  15. 17 4月, 2005 1 次提交
    • L
      Linux-2.6.12-rc2 · 1da177e4
      Linus Torvalds 提交于
      Initial git repository build. I'm not bothering with the full history,
      even though we have it. We can create a separate "historical" git
      archive of that later if we want to, and in the meantime it's about
      3.2GB when imported into git - space that would just make the early
      git days unnecessarily complicated, when we don't have a lot of good
      infrastructure for it.
      
      Let it rip!
      1da177e4