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profiler: Reenable built-in profiler

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2ed1ebcf6 "timer: replace time() with QEMU_CLOCK_HOST" broke compile
when configured with --enable-profiler. Turned out the profiler has been
broken for a while.

This does s/qemu_time/tcg_time/ as the profiler only works in a TCG mode.
This also fixes the compile error.

This changes profile_getclock() to return nanoseconds rather than
CPU ticks as the "profile" HMP command prints seconds and there is no
platform-independent way to get ticks-per-second rate.
Since TCG is quite slow and get_clock() returns nanoseconds (fine
enough), this should not affect precision much.

This removes unused qemu_time_start and tlb_flush_time.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Message-Id: <1426478258-29961-1-git-send-email-aik@ozlabs.ru>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Alexey Kardashevskiy 2015-03-16 14:57:38 +11:00 • committed by Paolo Bonzini
parent b680c5ba54
commit 89d5cbddee
3 changed files with 6 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

6
monitor.c
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@ -1975,7 +1975,7 @@ static void hmp_info_numa(Monitor *mon, const QDict *qdict)
#ifdef CONFIG_PROFILER
int64_t qemu_time;
int64_t tcg_time;
int64_t dev_time;
static void hmp_info_profile(Monitor *mon, const QDict *qdict)
@ -1983,8 +1983,8 @@ static void hmp_info_profile(Monitor *mon, const QDict *qdict)
monitor_printf(mon, "async time %" PRId64 " (%0.3f)\n",
dev_time, dev_time / (double)get_ticks_per_sec());
monitor_printf(mon, "qemu time %" PRId64 " (%0.3f)\n",
qemu_time, qemu_time / (double)get_ticks_per_sec());
qemu_time = 0;
tcg_time, tcg_time / (double)get_ticks_per_sec());
tcg_time = 0;
dev_time = 0;
}
#else