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| author | Elliott Hughes <enh@google.com> | 2014-05-30 19:00:03 -0700 |
|---|---|---|
| committer | Elliott Hughes <enh@google.com> | 2014-06-02 10:32:55 -0700 |
| commit | 5d9a7ba0dc9c24ed4e4efa9cac0e796fd524b308 (patch) | |
| tree | 4674df3b5064cb38211453b6e887c364f0c66f05 /libc/arch-x86/syscalls | |
| parent | 831405b749d15a11fb947a40d61fd858e952d860 (diff) | |
| download | bionic-5d9a7ba0dc9c24ed4e4efa9cac0e796fd524b308.zip bionic-5d9a7ba0dc9c24ed4e4efa9cac0e796fd524b308.tar.gz bionic-5d9a7ba0dc9c24ed4e4efa9cac0e796fd524b308.tar.bz2 | |
Avoid a system call in 'gettid'.
System calls can be pretty slow. This is mako, which has one of our
lowest latencies:
iterations ns/op
BM_unistd_getpid 10000000 209
BM_unistd_gettid 200000000 8
Bug: 15297299 (kernel panic from too many gettid calls)
Bug: 15315766 (excessive gettid overhead in liblogd)
Change-Id: I49656c0fc5b5d092390264a59e4f2c0d8a8b1aeb
Diffstat (limited to 'libc/arch-x86/syscalls')
| -rw-r--r-- | libc/arch-x86/syscalls/gettid.S | 17 |
1 files changed, 0 insertions, 17 deletions
diff --git a/libc/arch-x86/syscalls/gettid.S b/libc/arch-x86/syscalls/gettid.S deleted file mode 100644 index 1f264b1..0000000 --- a/libc/arch-x86/syscalls/gettid.S +++ /dev/null @@ -1,17 +0,0 @@ -/* Generated by gensyscalls.py. Do not edit. */ - -#include <private/bionic_asm.h> - -ENTRY(gettid) - movl $__NR_gettid, %eax - int $0x80 - cmpl $-MAX_ERRNO, %eax - jb 1f - negl %eax - pushl %eax - call __set_errno - addl $4, %esp - orl $-1, %eax -1: - ret -END(gettid) |