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xen-devel
Re: [Xen-devel] More network tests with xenoprofile this time
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To: |
"Santos, Jose Renato G" <joserenato.santos@xxxxxx> |
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Subject: |
Re: [Xen-devel] More network tests with xenoprofile this time |
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From: |
Andrew Theurer <habanero@xxxxxxxxxx> |
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Date: |
Tue, 21 Jun 2005 21:22:20 -0500 |
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Cc: |
Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, "Turner, Yoshio" <yoshio_turner@xxxxxx>, Aravind Menon <aravind.menon@xxxxxxx>, G John Janakiraman <john@xxxxxxxxxxxxxxxxxxx>, William Cohen <wcohen@xxxxxxxxxx> |
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Wed, 22 Jun 2005 02:21:24 +0000 |
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FWIW, I took a look at find_domain_by_id() and swapped out the rw lock
with a spin lock for domlist_lock. The time spent in the this function
was reduced by 18%. This function was certainly not the "hottest" one I
recorded while running netperf, but every little bit helps I suppose.
Below are before/after xenoprofile snippets:
before:
547036 6.32 xen-unstable-syms mask_and_ack_level_ioapic_irq
510448 5.90 xen-unstable-syms end_level_ioapic_irq
463386 5.35 vmlinux-2.6.11-xen0-up net_tx_action
371072 4.29 tg3.ko tg3_interrupt
261341 3.02 xen-unstable-syms find_domain_by_id
237601 2.75 xen-unstable-syms hypercall
228649 2.64 vmlinux-2.6.11-xen0-up nf_iterate
215634 2.49 xen-unstable-syms do_update_va_mapping
214077 2.47 vmlinux-2.6.11-xen0-up net_rx_action
after:
549276 6.35 xen-unstable-syms mask_and_ack_level_ioapic_irq
511693 5.91 xen-unstable-syms end_level_ioapic_irq
466873 5.39 vmlinux-2.6.11-xen0-up net_tx_action
375702 4.34 tg3.ko tg3_interrupt
239219 2.76 xen-unstable-syms hypercall
230641 2.67 vmlinux-2.6.11-xen0-up nf_iterate
220480 2.55 xen-unstable-syms do_update_va_mapping
217472 2.51 tg3.ko tg3_rx
217029 2.51 vmlinux-2.6.11-xen0-up net_rx_action
214271 2.48 xen-unstable-syms find_domain_by_id
Has anyone thought about using read-copy-update in Xen?
I plan on looking at the two irq functions next.
-Andrew
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